CN100555748C - Radio frequency IC tag and manufacture method thereof - Google Patents
Radio frequency IC tag and manufacture method thereof Download PDFInfo
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- CN100555748C CN100555748C CNB2005100068575A CN200510006857A CN100555748C CN 100555748 C CN100555748 C CN 100555748C CN B2005100068575 A CNB2005100068575 A CN B2005100068575A CN 200510006857 A CN200510006857 A CN 200510006857A CN 100555748 C CN100555748 C CN 100555748C
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Abstract
The invention provides radio frequency IC tag and manufacture method thereof.Can provide a kind of small size antenna that can utilize obtaining reading information under the situation that the wide while communication distance of directionality do not reduce, and cheap radio frequency IC tag with small-sized thin type structure.The H type antenna (1) of radio frequency IC tag is that middle body in length L attenuates the antenna width D and makes the structure that IC chip (2) are set on the central taper portion of so-called H type shape of antenna width D broadening in the two side portions (peripheral part) of length L.Like this, because become the shape of broadening in the both sides of length L direction by the antenna width D that makes H type antenna (1), IC chip (2) can obtain maximum current at the middle body (taper portion promptly) of the antenna that is connected with H type antenna (1), concentrates and the raising antenna efficiency in the antenna peripheral part electromagnetic energy of surrounding IC chip (2).In addition, also can be consistent with the shape of the housing that holds H type antenna (1) by making, in the middle of making taper portion to end direction move or radiating surface at antenna on peristome and otch are set.
Description
Technical field
The present invention relates to the radio frequency IC tag of the information that in the IC chip, writes down with wireless transmission etc., particularly given radio frequency IC tag and the wireless manufacture method improved with label to the antenna that sends radio wave from the IC chip.
Background technology
In recent years, use radio frequency IC tag widely at aspects such as the information management of article and logistics managements.In addition, in definite or management animal etc., also bring into use these radio frequency IC tags.This radio frequency IC tag is to constitute by the small IC chip of recorded information with the small size antenna that wireless mode sends the information of IC chip.In other words, this radio frequency IC tag, such as, near the small IC chip installing the middle body of elongate antenna about wide 0.4mm * dark 0.4mm * high 0.1mm pastes on article and the animal etc. and uses.So, if reading device is placed on the radio frequency IC tag, just can be with the information (information of the attribute of promptly relevant each article and animal etc.) of noncontact mode reading and recording on the IC chip.For this radio frequency IC tag is pasted on article and animal or the like, preferably make radio frequency IC tag as far as possible little.Therefore, the antenna of radio frequency IC tag must be made very for a short time.
Figure 12 is the dipole antenna of existing radio frequency IC tag.Shown in Figure 12 (a), at the central portion of dipole antenna 21 IC chip 22 is installed, be that λ/2 o'clock can obtain maximum antenna efficient in the length L of dipole antenna 21.Wherein, λ represents the wavelength of frequency of utilization.So, diminish in order to make radio frequency IC tag, such as, shown in Figure 12 (b), can consider that the part of dipole antenna 21 is cut off the back to be used.
In addition, known also have middle body with antenna part to attenuate and make the direction that electric current flows through two end portions the width broadening so-called H type shape antenna and obtain the technology of the microstrip antenna of miniaturization.This technology, be by making magnetic field concentration impedance be increased in the tiny middle taper portion of H type antenna, resonance frequency reduced and reach antenna miniaturization (such as, the Japan Patent spy opens 2001-53535 communique (with reference to segment number 0015～0023, Fig. 1 and Fig. 2).Below be called patent documentation 1).In addition, the known technology of using the non-contact type IC tag of H type shape antenna in addition.This technology, be that coupling part with H type antenna makes ohmic contact and realize that the technology of the miniaturization of non-contact type IC tag (opens 2003-243918 communique (being called patent documentation 2 with reference to below the segment number 0012～0027, Fig. 1～Fig. 4)) such as, Japan Patent spy.
Summary of the invention
The invention provides a kind of radio frequency IC tag, have the IC chip of the information that write down and will be recorded in the antenna that the information in this IC chip sends with wireless mode, described radio frequency IC tag is characterised in that: above-mentioned antenna, the direction that its power pack that above-mentioned IC chip is set flows along electric current is elongated shape and extends, the radiant section of the above-mentioned antenna that exists on the both direction that flows of above-mentioned power pack at above-mentioned electric current is an axle with the length direction of above-mentioned power pack, width forms than above-mentioned power pack widelyer, between above-mentioned power pack and above-mentioned radiant section, accompany insulating element, above-mentioned power pack and the coupling of above-mentioned radiant section electrostatic capacitance.
The invention provides a kind of manufacture method of making radio frequency IC tag, described radio frequency IC tag has the IC chip of the information that write down and will be recorded in the antenna that the information in this IC chip sends with wireless mode, and described manufacture method is characterised in that and comprises: in the step that is formed antenna by metallic conductor pattern on the surface of insulating properties substrate; Power pack at above-mentioned antenna is provided with above-mentioned IC chip, the step that each terminal of above-mentioned IC chip is connected with above-mentioned antenna; Insulating element is coated on the step of above-mentioned antenna surface; In the broad range that comprises above-mentioned insulating element on above-mentioned antenna, the above-mentioned IC chip of clamping forms the step of the 1st auxiliary antenna and the 2nd auxiliary antenna; And the step that coats with insulating cover of the whole surface that will comprise above-mentioned the 1st auxiliary antenna, above-mentioned the 2nd auxiliary antenna and above-mentioned IC chip.
Yet, because at the antenna length L of dipole antenna is that λ/2 o'clock can obtain maximum antenna efficient, in order to make the radio frequency IC tag miniaturization, shown in Figure 12 (b), when antenna is cut off in the longitudinal direction, the antenna efficiency reduction can make communication distance shorten, and the result is difficult communication and the information of IC chip can't be read sometimes.Figure 13 is the performance plot that the relation of the length of antenna of dipole antenna of shape shown in Figure 12 and communication distance is shown.As shown in figure 13, when antenna length L (mm) shortened, communication distance S (mm) sharply reduced, such as, when the antenna width D is fixed as 1.5mm antenna length L smaller or equal to 25mm, just can not communicate.
In addition, H type antenna shown in the above-mentioned patent documentation 1, it is the so-called microstrip antenna that constitutes by the pellet electrode of the H shape that forms on dielectric surface and the grounding electrode that on inner surface, forms, be as the small size antenna on the pocket telephone, can not intactly use for the microstrip antenna that does not have grounding electrode.In addition, antenna shown in the above-mentioned patent documentation 2, be to adopt H type shape antenna to realize reaching the non-contact type IC tag of miniaturization, utilizing the big antenna pattern of left-right symmetric forms on substrate two width and be the IC tag of intermediary when constituting H type shape antenna with these antenna figure, antenna pattern and IC tag are ohmic contact.
In other words, in the manufacturing step of non-contact type IC tag, the substrate that forms antenna pattern is not being implemented under the state of film lining, IC tag directly is set on antenna pattern becomes ohmic contact.So, in the technology of patent documentation 2, in the manufacturing step of H type antenna, at the big antenna pattern of two width be used for can not implementing the film lining between the antenna pattern that the IC chip is set of intermediary.In other words, can not be coupled in the electrostatic capacitance of intactly utilizing by the manufacturing step that will always carry out and constitute H type antenna and make the non-contact type IC tag.
The present invention is the invention of finishing in view of the above problems, its purpose is to provide a kind of small size antenna to read information under the communication distance situation about not reducing in wide obtaining directionality, and cheap manufacture method with radio frequency IC tag and this radio frequency IC tag of small-sized thin type structure.In addition, its purpose also is to provide a kind of and can makes the antenna pattern radio frequency IC tag consistent with the shape of holding shell.
Radio frequency IC tag of the present invention is the invention for the intention that achieves the above object, be to have the IC chip of recorded information and the radio frequency IC tag of the antenna that the information in this IC chip that will be recorded in sends with wireless mode, the direction that flows along electric current at the power pack that above-mentioned IC chip is set is the elongated shape extension, the radiant section that the both direction that flows from above-mentioned power pack towards above-mentioned electric current exists is an axle with the length direction of above-mentioned power pack, forms than power pack with the wideer above-mentioned antenna of width.
In addition, radio frequency IC tag of the present invention, the position configuration of power pack that can be by the IC chip will be set obtains maximum antenna power in the position of radiant section symmetry on above-below direction and left and right directions.Yet, when the shape to the shell that holds radio frequency IC tag has restriction, also can be with position configuration that power pack is set in the asymmetrical position of radiant section among at least one of above-below direction and left and right directions.In addition, when the shape to shell has restriction, also can form the peristome of one or more arbitrary shapes in the optional position of radiant section.Perhaps, also can form the otch of one or more arbitrary shapes in the optional position of the periphery of radiant section.By making this distortion antenna antenna efficiency is slightly reduced, but, when being preferential, also can use this distortion antenna with convenience to the installation of non-installation object because efficient is better than the antenna efficiency of dipole antenna.
Description of drawings
Fig. 1 is the plane graph of H type antenna of execution mode 1 that the radio frequency IC tag of embodiments of the present invention is shown.
Fig. 2 is the antenna performance figure of relation that sky line width and the communication distance of H type antenna shown in Figure 1 are shown.
Fig. 3 is the diagrammatic sketch of an example of manufacturing step that the H type antenna of execution mode shown in Figure 11 is shown.
Fig. 4 is the figure of manufacturing step that the H type antenna of another way is shown.
Fig. 5 is the plane graph of O type antenna of execution mode 2 that the radio frequency IC tag of embodiments of the present invention is shown.
Fig. 6 is the figure of asymmetrical shape modification that the H type antenna of embodiments of the present invention 3 is shown.
Fig. 7 is the figure of asymmetrical shape modification that the O type antenna of embodiments of the present invention 3 is shown.
Fig. 8 is the outline drawing that is illustrated in an embodiment of the O type antenna of the asymmetrical shape of application in the execution mode 3.
Fig. 9 is the figure of opening modification that the H type antenna of embodiments of the present invention 3 is shown.
Figure 10 is the figure of opening modification that the O type antenna of embodiments of the present invention 3 is shown.
Figure 11 is the figure of periphery otch modification that the H type antenna of embodiments of the present invention 3 is shown.
Figure 12 is the pie graph that the dipole antenna of existing radio frequency IC tag is shown.
Figure 13 is the performance plot that the relation of the antenna length of dipole antenna of shape shown in Figure 12 and communication distance is shown.
Embodiment
Enumerate preferred embodiment illustrated at the radio frequency IC tag that is used for implementing preferred forms of the present invention (below be called " execution mode ") with reference to the accompanying drawings.Relate to radio frequency IC tag of the present invention, the width of the middle body by making the power pack that is set to the IC chip attenuates, and make in becoming the peripheral part of radiant section the width of broadening antenna pattern symmetrically, such as, by becoming the antenna pattern of H type, reach the efficient that makes energy focus on the periphery of IC chip efficiently and improve antenna.In view of the above, even because communication distance is reduced the contraction in length of antenna, the result can seek the miniaturization of radio frequency IC tag.
" execution mode 1 "
Fig. 1 is the plane graph of H type antenna that the execution mode 1 of radio frequency IC tag of the present invention is shown.As shown in Figure 1, the formation of the H type antenna 1 of radio frequency IC tag is on the middle body that H type shape attenuates IC chip 2 to be set.Described H type shape is meant that the middle body in the length L direction attenuates the antenna width D and makes antenna width D broadening in the two side portions (peripheral part) of length L direction.H type antenna 1 as stripline antenna, prevents countermeasure and impedance matching in order to carry out electrostatic breakdown, forms continuous hook-shaped slit 5 at the middle body that IC chip 2 is set, and IC chip 2 is across slit, and each terminal is connected with the both sides of slit 5.Therefore, the middle body in early stage becomes the power pack that antenna current is flow through, and two side portions (peripheral part) becomes the radiant section of radiating antenna electric wave.
Like this, because become the shape of broadening in the both sides of length L direction by the antenna width D that makes H type antenna 1, IC chip 2 can obtain maximum current at the middle body (taper portion promptly) of the antenna that is connected with H type antenna 1, concentrate in the antenna peripheral part electromagnetic energy of surrounding IC chip 2, when the antenna width D that makes H type antenna 1 is got setting, even length L shortens, also can improve antenna efficiency and communication distance is strengthened.In other words, as existing situation, in the microstrip antenna that constitutes by grounding electrode and pellet electrode, even pellet electrode is made H type shape, owing on pellet electrode, the IC chip can not be set, final result is though can obtain because the concentrated effect that impedance increase and resonance frequency are reduced in magnetic field is not contributed for strengthening communication distance.Relative therewith, in the present embodiment, because H type antenna 1 is as not needing the stripline antenna of grounding electrode, can IC chip 2 be set at the middle body of the most concentrated antenna of electromagnetic energy, its result can improve antenna efficiency and strengthens communication distance.
Fig. 2 is the antenna performance figure of relation that sky line width and the communication distance of H type antenna shown in Figure 1 are shown.In addition, in Fig. 2, transverse axis is represented antenna width D (mm), and the longitudinal axis is represented communication distance S (mm).In other words, Fig. 2 is illustrated in the H type antenna 1 shown in Figure 1, is fixed as 20mm, 2mm and 1.5mm respectively and the experimental data of the relation of resulting antenna width D and communication distance S when the antenna width D being changed experimentize in the width D 1 with the middle taper portion of the length L 1 of the middle taper portion of length L, length direction and Width.
As shown in Figure 2, be 20mm when constant at antenna length L, if the antenna width D is changed, during smaller or equal to 40mm, can communicate by letter, and when the antenna width D was 24mm, communication distance S became maximum communication distance 119mm in the antenna width D.In other words, in Fig. 1, on the middle taper portion of the middle body of H type antenna 1, IC chip 2 is set, the direction of antenna current from the middle taper portion of H type antenna 1 along length L is when the width dwell portion of both sides flows, the electric current maximum of middle taper portion, and towards the width dwell portion of both sides, electric current disperses.At this moment, be the center with the middle taper portion (part of IC chip 2 promptly is set) of the central authorities of H type antenna 1, because the electromagnetic energy of the width dwell portion of both sides is concentrated, antenna efficiency is improved.
By the concentrated effect of this electromagnetic energy, be that small-sized H type antenna about 20mm also can make antenna efficiency improve communication distance is strengthened even the length L of H type antenna 1 is 20mm, antenna width D.In addition, be that 20mm, antenna width D are about 20mm but do not have in the foursquare antenna of middle taper portion in length L, because can not concentrate electromagnetic energy, antenna efficiency is improved, so be difficult to make communication distance to strengthen.In addition, be under the situation of antenna of the U font (shape that promptly only comprises the middle taper portion top of H type shown in Figure 1) that attenuates at middle body, because electromagnetic energy is loose to the wide part of width, so be that the concentrated effectively electromagnetic energy in center is difficult with middle taper portion (part of IC chip promptly is set).So,,, can not strengthen communication distance fully though can obtain the effect of certain increasing communication distance because can not as H type antenna, improve antenna efficiency.
Fig. 3 is the figure of an example that the manufacturing step of H type antenna shown in Figure 1 is shown.
Manufacture method at the radio frequency IC tag of this explanation comprises: as " when the forming antenna by metallic conductor on the surface of insulating properties substrate; make middle body be elongated shape by being patterned into, and make the peripheral part that exists on the both direction of the length direction of middle body be the graphical step that the axle center width launches with the length direction of this middle body " of step 1; " at middle body the IC chip being set, the step that each terminal of above-mentioned IC chip is connected with above-mentioned metallic conductor " as step 2; And as " forming middle body and the metallic conductor of peripheral part and the step of IC chip " of step 3 with insulating cover lining.
In addition, as step 1 " when on the surface of insulating properties substrate, forming antenna; make middle body be elongated shape by being patterned into by metallic conductor; and to make the peripheral part that exists on the both direction of the length direction of middle body be the graphical step that the axle center width launches with the length direction of this middle body " in, also can as the axle center peripheral part be carried out graphically symmetrically with the length direction of middle body.
At first, shown in Fig. 3 (b), on the surface of antenna substrate 1a, metallic patterns such as copper and silver are turned to the H type.Such as, can be metal pastes such as copper to be patterned into the H type print and fire, form H type metal pattern layer or be patterned into the H type by thin metal film is carried out etching by plating.At this moment, shown in Fig. 3 (a), on the middle taper portion of the middle body of H type antenna 1, continuous hook-type slit 5 is set.In addition, as mentioned above, this slit 5, for the electrostatic breakdown of IC chip 2 prevents that countermeasure and impedance matching are provided with, also have, stride slit 5 with respect to the length direction mould of H type antenna 1 IC chip 2 is set, each electrode of IC chip 2 be connected with the metal part branch of the both sides of slit 5 (IC chip 2 is connected across slit 5).In addition, Fig. 3 (b) is the profile along the A-A line of Fig. 3 (a).
Below, shown in Fig. 3 (b), in antenna substrate 1a side configuration adhesive sheet 3, the covering sealant 4 that also has insulating properties when lining has water proofing property on the surface of H type antenna 1.Thus, shown in Fig. 3 (c), form radio frequency IC tag 10 with water proofing property.In other words, forming length direction is that 22mm, Width are that 22mm and thickness are the slim foursquare micro radio IC tag 10 about 1mm.
Below, the manufacturing step of the H type antenna of another execution mode is illustrated.Fig. 4 is the figure of manufacturing step that the H type antenna of another way is shown.Wherein, the peripheral part that exists in the both sides of middle body (middle taper portion) is formed as auxiliary antenna, auxiliary antenna is connected by the electrostatic capacitance coupling with middle body.
This manufacturing step comprises: as " in the graphical step that is formed antenna 6a by metallic conductor on the surface of antenna substrate 6b " of step 11; " middle body at antenna 6a is provided with IC chip 2, makes be connected with the antenna 6a step of (being connected with antenna across slit) of each terminal of IC chip 2 " as step 12; " with the step on the surface of dielectric film 7 lining antenna 6a " as step 13; " clamping IC chip 2 forms the step of the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b in the middle of in the broad range of the above-mentioned dielectric film 7 on comprising antenna 6a " as step 14; And as " the whole surface of the 1st auxiliary antenna 8a, the 2nd auxiliary antenna 8b and IC chip 2 is with the step of insulating cover lining " of step 15.
At first, shown in Fig. 4 (b), utilize the graphical in the longitudinal direction elongated antenna 6a of metallic conductors such as copper and silver on the surface of antenna substrate 6b.Antenna 6a's graphically can be metal pastes such as copper graphically to be printed fire, carry out by plating formation metal pattern layer or by thin metal film being carried out methods such as etching.At this moment, shown in Fig. 4 (a), on the middle taper portion of the middle body of antenna 6a, continuous hook-type slit 5 is set.In addition, on the length direction of antenna 6a, IC chip 2 is set, makes each electrode of IC chip 2 be connected with antenna 6a (IC chip 2 is connected with antenna across slit 5) across slit 5.In addition, Fig. 4 (b) is the profile along the B-B line of Fig. 4 (a).
In addition, shown in Fig. 4 (b), lining dielectric film 7 on the surface of antenna 6a.Thus, dielectric film 7 be can obtain comprising and antenna substrate 6b, antenna 6a and IC chip 2 incorporate insertion sections (Inlet) 6 made.
So, adhesive sheet 3 is disposed at the antenna substrate 6b side of insertion section 6, in the broad range of the dielectric film 7 on comprising antenna 6a, form the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b by clamping IC chip 2 in the middle of graphical printing, plating processing and the etching etc.Thus, can form the H type antenna shown in Fig. 4 (a).
After forming this H type antenna, shown in Fig. 4 (b), the lining insulation covers sealant 4 on the whole surface of the adhesive sheet 3 that comprises insertion section the 6, the 1st auxiliary antenna 8a, the 2nd auxiliary antenna 8b.Thus, the radio frequency IC tag 11 of formation shown in Fig. 4 (c).In other words, the same with the occasion of Fig. 3, forming length direction is that 22mm, Width are that 22mm and thickness are the slim foursquare micro radio IC tag 11 about 1mm.
In addition, wherein antenna substrate 6b is used for reinforcement antenna 6a, also can omit antenna substrate 6b as required and directly form antenna 6a on adhesive sheet 3.
In the step 14 shown in Fig. 4 (b), because on the surface of the antenna 6a of insertion section 6, form the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b through dielectric film 7, antenna 6a and the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b are not ohmic contact, but the electrostatic capacitance coupling.Because in the H type antenna that forms like this, flow through high-frequency current,, also can be electrically connected fully even antenna 6a and the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b are the electrostatic capacitance couplings.
In addition, so-called ohmic contact does not have diode (rectification) characteristic, but has the knot of the current-voltage characteristic of so-called Ohm's law establishment.So-called electrostatic capacitance coupling is the coupling that forms capacitor through dielectric between metal and metal.
In the occasion of ohmic contact, flow through in order to make electric current, must between antenna and IC chip, use the bonding material of anisotropic conductive (Anisotropic Conductive) by joint.Relative therewith, in execution mode, because antenna 6a and the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b be coupled by electrostatic capacitance, as mentioned above, dielectric film 7 as dielectric (insulating element), can be formed for the capacitor of electrostatic capacitance coupling.Thus, between antenna 6a and the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b, can apply flexibly the material of the erosion resistant that in other steps, uses, sticky material, adhesives etc., form capacitor used as dielectric.
Its result does not need the adhesives of anisotropic conductive of high price, can accomplish to simplify manufacturing step and reduce material cost, thereby reduce the goods cost.
In addition, in Fig. 4 (a), the otch that antenna 6a uses is to be arranged on the 1st auxiliary antenna 8a, but also can be arranged on the 2nd auxiliary antenna 8b, and also can be arranged at the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b on both.Be arranged at the 1st auxiliary antenna 8a and the 2nd auxiliary antenna 8b occasion on both at otch, making the also orientation of tube antenna 6a not of radio frequency IC tag.
" execution mode 2 "
Fig. 5 is the plane graph of O type (dumbbell shape) antenna that the execution mode 2 of radio frequency IC tag of the present invention is shown.As shown in Figure 5, adopting round-shaped O type antenna 9 is structures that the middle body of two semicircle metal formings of radius R is formed by connecting with the long and thin metal paper tinsel of width D 2.So, IC chip 2 is set and the formation radio frequency IC tag on the part of elongated metal forming.When the direction of arrow of IC chip 2 towards figure from the O type antenna 9 of this shape flows through electric current, flow through and flow to the semi-circular portions of both sides at middle body (IC chip 2 be provided with part) maximum current.Thus,, the electromagnetic energy of the semi-circular portions of both sides concentrates, even the little O type antenna of radius R also can improve antenna efficiency and strengthens communication distance because surrounding IC chip 2.By means of radio frequency IC tag with this O type antenna 9, such as, even being installed on bolt head, radio frequency IC tag also can strengthen communication distance.
" execution mode 3 "
In the present embodiment, the several modification to the radio frequency IC tag of the warpage that makes above-mentioned H type antenna or O type antenna are illustrated.In other words, in the radio frequency IC tag of execution mode 3, the width than the length direction middle body of antenna narrows the shape that makes antenna becomes H type or O type, for the radio frequency IC tag that the IC chip is set at middle body, make the H type antenna or the O type antenna of the deformed shape that position that the IC chip is set (taper portion promptly) moves to desirable position from the antenna middle body.Perhaps, make H type antenna or O type antenna about or shape up and down become the H type antenna or the O type antenna of asymmetrical deformed shape.Perhaps be H type antenna or the O type antenna that the deformed shape of peristome is set on the part of aerial radiation face.
In other words, as mentioned above, when the IC chip configuration is become supply terminals on the middle taper portion of the middle body of H type antenna or O type antenna (becoming power pack), electromagnetic energy is concentrated effect performance function and is obtained maximum antenna efficient in middle taper portion.Yet according to the difference of the shape of the installed object that is used for installing radio frequency IC tag etc., the shape of holding the framework (housing) of radio frequency IC tag is restricted sometimes.Such as, near the middle body of the housing that holds radio frequency IC tag, be provided with and be used for housing being installed on the peristome, pillar of installed object and being provided for housing is installed on the occasion of the location of installed object with peristome, must will be contained in the H type antenna in the housing or be out of shape consistent of shape of O type antenna with it in the housing periphery.
In other words, the position that is provided with of IC chip be not defined in the core of H type antenna or O type antenna but makes under the situation of radio frequency IC tag of the above-below direction that position relative H type antenna and O type antenna are set of IC chip or the deformed shape that left and right directions becomes asymmetric position, though antenna efficiency reduces slightly, but compare with existing rectangle shape antenna (dipole antenna), the radio frequency IC tag of deformed shape can obtain high antenna efficiency.Therefore, preferential to the property easy for installation of installed object if in the time can guaranteeing enough communication distances, preferably adopt the deformed shape of the H type antenna or the O type antenna of radio frequency IC tag.Below the H type antenna of deformed shape in the execution mode 3 or several modification of O type antenna are illustrated.
The modification of the asymmetrical shape of＜H type antenna 〉
Fig. 6 is the diagrammatic sketch of asymmetrical shape modification that the H type antenna of embodiments of the present invention 3 is shown.Shown in Fig. 6 (a), for as the radio frequency IC tag of middle taper portion 1a in the antenna symmetry type of the basic model of the H of middle body type antenna 1, also can become as the distortion 1 shown in the figure (b), make middle taper portion 1a (or top) skew downwards of H type antenna 1, form on the taper portion 1a of this centre in the slit 5, the supply terminals that IC chip 2 is set across slit 5 is the radio frequency IC tag of eccentrically arranged type up and down.
In addition, also can become the distortion 2 shown in (c) as figure, the middle body that makes middle the taper portion 1a of H type antenna 1 is intactly fixed on above-below direction and is made the swept area of the left and right sides antenna of H type antenna 1 become the radio frequency IC tag of asymmetrical supply terminals left and right sides eccentrically arranged type.In addition, also can become as the distortion 3 shown in the figure (d), make the middle taper portion 1a of H type antenna 1 make the swept area of the left and right sides antenna of H type antenna 1 become the asymmetrical supply terminals up and down radio frequency IC tag of eccentrically arranged type when (or top) is offset downwards.Under the situation of the H type antenna that becomes the such asymmetrical shape of Fig. 6 (b), (c), (d), compare with the H type antenna of the such symmetric shape of Fig. 6 (a), antenna efficiency reduces slightly, but in the scope that can guarantee essential communication distance, can make antenna pattern distortion and the convenience of seeking on installed object, to install.
The modification of the asymmetrical shape of＜O type antenna 〉
Fig. 7 is the diagrammatic sketch of asymmetrical shape modification that the O type antenna of embodiments of the present invention 3 is shown.Shown in Fig. 7 (a), for as the radio frequency IC tag of middle taper portion 9a in the antenna symmetry type of the basic model of the O of middle body type antenna 9, also can become as the distortion 1 shown in the figure (b), make middle taper portion 9a (or top) skew downwards of O type antenna 9, form on the taper portion 9a of this centre in the slit 5, the supply terminals that IC chip 2 is set across slit 5 is the radio frequency IC tag of eccentrically arranged type up and down.
In addition, also can become the distortion 2 shown in (c) as figure, the middle body that makes middle the taper portion 9a of O type antenna 9 is intactly fixed on above-below direction and is made the swept area of the left and right sides antenna of O type antenna 9 become the radio frequency IC tag of asymmetrical supply terminals left and right sides eccentrically arranged type.In addition, also can become as the distortion 3 shown in the figure (d), make the middle taper portion 9a of O type antenna 9 make the swept area of the left and right sides antenna of O type antenna 9 become the asymmetrical supply terminals up and down radio frequency IC tag of eccentrically arranged type when (or top) is offset downwards.Under the situation of the O type antenna that becomes the such asymmetrical shape of Fig. 7 (b), (c), (d), compare with the O type antenna of the symmetric shape of Fig. 7 (a), antenna efficiency reduces slightly, but in the scope that can guarantee essential communication distance, can make antenna pattern distortion and the convenience of seeking on installed object, to install.
The embodiment of the O type antenna of＜asymmetrical shape 〉
Fig. 8 is the outline drawing that is illustrated in an embodiment of the O type antenna of the asymmetrical shape of application in the execution mode 3.As shown in Figure 8, the external diameter of O type antenna 9 is 24mm, at the middle body of O type antenna 9, in order to place the pillar of above-mentioned housing, the blank parts of diameter 6mm is set.So, in the position of the center 6mm of distance O type antenna 9, the radiant section of the antenna about the middle taper portion 9a that width is set is 1.5mm, length and be 2.0mm connects.In addition, forming width near the central authorities of middle taper portion 9a is the hook-shaped slit of 0.15mm.In addition, confirmed by experiment, utilized the O type antenna of shape shown in Figure 8 can obtain the communication distance of 100mm.
The opening modification of＜H type antenna 〉
Fig. 9 is the diagrammatic sketch of opening modification that the H type antenna of embodiments of the present invention 3 is shown.Shown in Fig. 9 (a), for as the radio frequency IC tag of middle taper portion 1a in the antenna symmetry type of the basic model of the H of middle body type antenna 1, also can become as the distortion 1 shown in the figure (b), make middle taper portion 1a (or top) skew downwards of H type antenna 1, when on the taper portion 1a of this centre, forming slit 5 and IC chip 2 be set, near the radio frequency IC tag of eccentrically arranged type about the supply terminals of formation peristome 22 middle body of H type antenna.
In addition, also can become as the distortion 2 shown in the figure (c), make the middle body of middle taper portion 1a of H type antenna 1 intactly fixing and make the swept area of the left and right sides antenna of H type antenna 1 become the asymmetrical while, form the radio frequency IC tag of the supply terminals left and right sides eccentrically arranged type of peristome 22 at the wide antenna side of the swept area of H type antenna 1 (the left antenna side among the figure).In addition, also can become as the distortion 3 shown in the figure (d), make the middle taper portion 1a of H type antenna 1 make the swept area of the left and right sides antenna of H type antenna 1 become asymmetric when (or top) is offset downwards, in addition, also at the supply terminals that forms peristome 22 at the wide antenna side of the swept area of H type antenna 1 (the left antenna side among the figure) radio frequency IC tag of eccentrically arranged type up and down.
In other words, when having peristome 22 in H type antenna 1, the position that is provided with of IC chip 2 also is according to the position that is provided with shown in the asymmetrical shape modification of the H type antenna of Fig. 6.In addition, the shape of peristome 22 is not limited to circle shown in Figure 9, also can be polygon arbitrarily.In addition, preferably according to the difference of peristome 22, supply terminals position (position of taper portion 1a promptly) is suitably moved.In addition, the allocation position of peristome 22 can change arbitrarily.In addition, formed peristome also can exist identical shaped or difform a plurality of on antenna.
Become the such asymmetrical shape of Fig. 9 (b), (c), (d) and having the occasion of the H type antenna of peristome, compare with the H type antenna of the such symmetric shape of Fig. 9 (a), antenna efficiency reduces slightly, but in the scope that can guarantee essential communication distance the convenience by peristome being set or making antenna pattern distortion seek on installed object, to install.
The opening modification of＜O type antenna 〉
Figure 10 is the diagrammatic sketch of opening modification that the O type antenna of embodiments of the present invention 3 is shown.Shown in Figure 10 (a), for as the radio frequency IC tag of middle taper portion 9a in the antenna symmetry type of the basic model of the O of middle body type antenna 9, also can become as the distortion 1 shown in the figure (b), make middle taper portion 9a (or top) skew downwards of O type antenna 9, when on the taper portion 9a of this centre, forming slit 5 and IC chip 2 be set, near the radio frequency IC tag of eccentrically arranged type about the supply terminals of formation peristome 22 middle body of O type antenna.
In addition, also can become as the distortion 2 shown in the figure (c), make the middle body of middle taper portion 9a of O type antenna 9 intactly fixing and make the swept area of the left and right sides antenna of O type antenna 9 become the asymmetrical while, form the radio frequency IC tag of the supply terminals left and right sides eccentrically arranged type of peristome 22 at the wide antenna side of the swept area of O type antenna 9 (the left antenna side among the figure).In addition, also can become as the distortion 3 shown in the figure (d), make the middle taper portion 9a of O type antenna 9 make the swept area of the left and right sides antenna of O type antenna 9 become asymmetric when (or top) is offset downwards, in addition, also at the supply terminals that forms peristome 22 at the wide antenna side of the swept area of O type antenna 9 (the left antenna side among the figure) radio frequency IC tag of eccentrically arranged type up and down.
In other words, when having peristome 22 in O type antenna 9, the position that is provided with of IC chip 2 also is according to the position that is provided with shown in the asymmetrical shape modification of the O type antenna of Fig. 7.In addition, the shape of peristome 22 is not limited to circle shown in Figure 10, also can be polygon arbitrarily.In addition, preferably according to the difference of peristome 22, supply terminals position (position of taper portion 9a promptly) is suitably moved.In addition, the allocation position of peristome 22 can change arbitrarily.In addition, the peristome that forms on antenna also can exist identical shaped or difform a plurality of.
Become the such asymmetrical shape of Figure 10 (b), (c), (d) and having the occasion of the O type antenna of peristome, compare with the O type antenna of the such symmetric shape of Figure 10 (a), antenna efficiency reduces slightly, but in the scope that can guarantee essential communication distance the convenience by peristome being set or making antenna pattern distortion seek on installed object, to install.
The periphery otch modification of＜H type antenna 〉
Figure 11 is the diagrammatic sketch of periphery otch modification that the H type antenna of embodiments of the present invention 3 is shown.Shown in Figure 11 (a), as middle taper portion 1a in the basic model of the H type antenna 1 of the antenna symmetry type of middle body, about periphery on also can form the otch of arbitrary shape.Such as, can form semicircular otch 23a on the periphery top of the left side antenna of the H type antenna 1 of Figure 11 (a), and, the otch 23c of rectangle also can be formed in the periphery bottom of the right side of figure antenna.In addition, also can become as the distortion 1 shown in the figure (b), the middle taper portion 1a of H type antenna 1 is offset downwards, when forming slit 5 and IC chip 2 is set on the taper portion 1a of this centre, near the supply terminals that forms semicircular otch 23a, 23b the periphery middle body of the left and right sides antenna of H type antenna 1 respectively is the radio frequency IC tag of eccentrically arranged type up and down.
In addition, also can become as the distortion 2 shown in the figure (c), make the middle body of middle taper portion 1a of H type antenna 1 intactly fixing and make the area of the left and right sides antenna of H type antenna 1 become the asymmetrical while, near the supply terminals that forms semicircular peristome 23a, 23b the periphery bottom of the left and right sides antenna of H type antenna 1 respectively is the radio frequency IC tag of eccentrically arranged type up and down.In addition, also can become the distortion 3 shown in (d), make the swept area of the left and right sides antenna of H type antenna 1 become near supply terminals asymmetric and formation otch 23a, 23b the periphery middle body of the left and right sides antenna of H type antenna 1 the radio frequency IC tag of eccentrically arranged type up and down downwards when middle the taper portion 1a of H type antenna 1 is offset as figure.
In other words, when having otch on the neighboring of H type antenna 1, the position that is provided with of IC chip 2 also is according to the position that is provided with shown in the asymmetrical shape modification of the H type antenna of Fig. 8.In addition, the shape of otch is not limited to circle, also can be polygon arbitrarily.In addition, preferably according to the difference of the position of otch, supply terminals position (position of taper portion 1a promptly) is suitably moved.In addition, scalloping allocation position can change arbitrarily.In addition, otch also can exist a plurality of, and otch also can mix existence with peristome.In addition, on the left and right sides antenna of H type antenna 1, both can there be difform otch, also can on the antenna of the left and right sides, has a plurality of difform otch.In addition, the position of the otch on the antenna of the left and right sides also might not need symmetry.In addition, the number of the otch on the antenna of the left and right sides is arbitrarily.
The summary of the distortion antenna of＜execution mode 3 〉
As mentioned above, realize at the distortion antenna that uses H type antenna or O type antenna under the situation of radio frequency IC tag, with respect to the basic model that in H type antenna and O type antenna, middle taper portion is disposed at centre, the efficient of antenna reduces slightly, but can improve the convenience when radio frequency IC tag is contained in housing.Such as, by necessary peristomes such as framework is installed being set near the middle body of radio frequency IC tag or, can further improving the fitting operation of radio frequency IC tag to installed object for the installation site of determining radio frequency IC tag is provided with otch in the antenna periphery.
Under the situation of the distortion antenna of realizing being used to seeking this convenience of installing, circular or polygonal peristome be can form at the radiant section of antenna, asymmetrical H type antenna or O type antenna that the antenna supply terminals is moved to end direction from middle body become.Perhaps, when also can form otch in the periphery of antenna, form circular or polygonal peristome in the optional position of the radiant section of antenna as required, become asymmetrical H type antenna or O type antenna that the antenna supply terminals is moved to end direction from middle body.In addition, do not need at the otch that only needs the antenna periphery preferably supply terminals to be disposed at middle body under the situation of peristome of antenna inside so that improve antenna efficiency as much as possible.
Enumerate above-mentioned several modification above the shape of H type antenna or O type antenna is illustrated, but the shape of antenna is not limited to these shapes, and the distortion of wide variety of shapes can be arranged.Such as, for H type antenna 1 shown in Figure 1, also can be the quadrangle form that cuts away four bights.In addition, all the same with O type antenna for H type antenna, middle taper portion 1a shown in Figure 6 not necessarily must be vertical with middle taper portion 9a shown in Figure 7 with respect to two side portions, also can be oblique.
In addition, more than Shuo Ming the present invention can implement all changes in the reached scope of its technological thought.Such as, radio frequency IC tag both can be the ROM type, also can be the RAM type.Being applied to which kind of purposes in addition can.
Radio frequency IC tag according to above embodiment, the power pack of the antenna middle body by the IC chip will be set makes the elongated centre shape that attenuates, and the radiant section of both sides is made the antenna of the wide shape of width, such as, the antenna of H type shape can make electromagnetic energy efficient more concentrate on the antenna periphery that surrounds the IC chip in the highland.Thus, even because shorten antenna length, the communication distance of IC chip also can prolong, and its result can not reduce communication performance and makes the radio frequency IC tag miniaturization.In addition, radio frequency IC tag according to above embodiment, the attenuate power pack of shape of the centre of the antenna by the IC chip will be set moves, makes the shape of H type antenna or O type antenna asymmetric up and down or at the radiating surface (radiant section) of antenna peristome is set and add otch to the optional position from the antenna middle body, can have the bigger degree of freedom on the method that radio frequency IC tag is installed to housing case.Its result, because the housing that it is optimum shape that radio frequency IC tag is contained in various mounting object things easily, so can when the number of assembling steps that makes radio frequency IC tag is simplified, further improve radio frequency IC tag convenience in the use.
In addition, can make this radio frequency IC tag simply.
Claims (17)
1. a radio frequency IC tag has the IC chip of the information that write down and will be recorded in the antenna that the information in this IC chip sends with wireless mode, and described radio frequency IC tag is characterised in that:
Above-mentioned antenna, the direction that its power pack that above-mentioned IC chip is set flows along electric current is elongated shape and extends, the radiant section of the above-mentioned antenna that exists on the both direction that flows of above-mentioned power pack at above-mentioned electric current is an axle with the length direction of above-mentioned power pack, width forms than above-mentioned power pack widelyer
Between above-mentioned power pack and above-mentioned radiant section, accompany insulating element, above-mentioned power pack and the coupling of above-mentioned radiant section electrostatic capacitance.
2. radio frequency IC tag as claimed in claim 1 is characterized in that:
Above-mentioned antenna constitutes H type shape by above-mentioned power pack and above-mentioned radiant section.
3. radio frequency IC tag as claimed in claim 1 is characterized in that:
Above-mentioned antenna, its above-mentioned radiant section that is present in above-mentioned power pack both sides forms on semicircular in shape ground respectively, constitutes round-shaped by above-mentioned power pack and above-mentioned radiant section.
4. radio frequency IC tag as claimed in claim 1 is characterized in that:
Above-mentioned power pack is configured in the position of above-mentioned radiant section symmetry on above-below direction and left and right directions.
5. radio frequency IC tag as claimed in claim 1 is characterized in that:
Above-mentioned power pack is configured in asymmetrical position on above-mentioned radiant section at least one direction in above-below direction and left and right directions.
6. radio frequency IC tag as claimed in claim 4 is characterized in that:
On the optional position of above-mentioned radiant section, form at least one peristome.
7. radio frequency IC tag as claimed in claim 5 is characterized in that:
On the optional position of above-mentioned radiant section, mix and form difform peristome.
8. radio frequency IC tag as claimed in claim 5 is characterized in that:
On the optional position of above-mentioned radiant section, form circular or polygonal peristome.
9. radio frequency IC tag as claimed in claim 8 is characterized in that:
The position of above-mentioned power pack is set according to the position that forms above-mentioned peristome on above-mentioned radiant section.
10. radio frequency IC tag as claimed in claim 4 is characterized in that:
On the optional position of the periphery of above-mentioned radiant section, form at least one otch.
11. radio frequency IC tag as claimed in claim 4 is characterized in that:
On the optional position of the periphery of above-mentioned radiant section, mix and form difform otch.
12. radio frequency IC tag as claimed in claim 10 is characterized in that:
Above-mentioned otch be shaped as circle or polygon.
13. radio frequency IC tag as claimed in claim 10 is characterized in that:
The position of above-mentioned power pack is set according to above-mentioned otch formed position on the periphery of above-mentioned radiant section.
14. radio frequency IC tag as claimed in claim 5 is characterized in that:
On the optional position of above-mentioned radiant section, form at least one peristome, and on the optional position of the periphery of above-mentioned radiant section, form at least one otch.
15. radio frequency IC tag as claimed in claim 14 is characterized in that:
Above-mentioned peristome is identical with above-mentioned kerf.
16. radio frequency IC tag as claimed in claim 14 is characterized in that:
Above-mentioned peristome is different with above-mentioned kerf.
17. a manufacture method of making radio frequency IC tag, described radio frequency IC tag have the IC chip of the information that write down and will be recorded in the antenna that the information in this IC chip sends with wireless mode, described manufacture method is characterised in that and comprises:
In the step that forms antenna by metallic conductor pattern on the surface of insulating properties substrate;
Power pack at above-mentioned antenna is provided with above-mentioned IC chip, the step that each terminal of above-mentioned IC chip is connected with above-mentioned antenna;
Insulating element is coated on the step of above-mentioned antenna surface;
In the broad range that comprises above-mentioned insulating element on above-mentioned antenna, the above-mentioned IC chip of clamping forms the step of the 1st auxiliary antenna and the 2nd auxiliary antenna; And
To comprise the step that the whole surface of above-mentioned the 1st auxiliary antenna, above-mentioned the 2nd auxiliary antenna and above-mentioned IC chip coats with insulating cover.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004173566 | 2004-06-11 | ||
| JP2004173566 | 2004-06-11 | ||
| JP2004345335 | 2004-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1707855A CN1707855A (en) | 2005-12-14 |
| CN100555748C true CN100555748C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100068575A Expired - Fee Related CN100555748C (en) | 2004-06-11 | 2005-01-28 | Radio frequency IC tag and manufacture method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP4755698B2 (en) |
| CN (1) | CN100555748C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195136A (en) * | 2010-03-01 | 2011-09-21 | 日立电线株式会社 | Antenna and electrical equipment with same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4998463B2 (en) * | 2006-04-10 | 2012-08-15 | 株式会社村田製作所 | Wireless IC device |
| WO2008118771A1 (en) * | 2007-03-23 | 2008-10-02 | Zih Corp. | Rfid tag with reduced detuning characteristics |
| CN102197537B (en) * | 2008-10-29 | 2014-06-18 | 株式会社村田制作所 | Wireless IC device |
| CN101814157B (en) * | 2009-02-23 | 2013-01-09 | 株式会社日立系统 | RFID label,a communication method thereof, and a RFID label testing device |
| CN103138045B (en) * | 2011-11-25 | 2016-03-30 | 刘智佳 | Microband paste formula RFID label antenna |
| CN106022436A (en) * | 2016-05-12 | 2016-10-12 | 安徽晶太信息科技有限公司 | Butterfly transponder and production method thereof |
| CN108577986B (en) * | 2018-05-21 | 2024-04-23 | 赛斐信息科技(南通)有限公司 | Radio frequency tag installation assembly, installation method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6107920A (en) * | 1998-06-09 | 2000-08-22 | Motorola, Inc. | Radio frequency identification tag having an article integrated antenna |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19703864A1 (en) * | 1997-02-03 | 1998-06-25 | Markus Dr Ing Thieme | Stripline conductor antenna element |
| US6018299A (en) * | 1998-06-09 | 2000-01-25 | Motorola, Inc. | Radio frequency identification tag having a printed antenna and method |
| JP2002135029A (en) * | 2000-10-25 | 2002-05-10 | Hitachi Ltd | Responder of mobile body identification device |
| JP2002164731A (en) * | 2000-11-24 | 2002-06-07 | Mitsubishi Electric Corp | Antenna device |
| JP2003108961A (en) * | 2001-09-28 | 2003-04-11 | Hitachi Ltd | Electronic tag and its manufacturing method |
| JP2003309418A (en) * | 2002-04-17 | 2003-10-31 | Alps Electric Co Ltd | Dipole antenna |
-
2005
- 2005-01-28 CN CNB2005100068575A patent/CN100555748C/en not_active Expired - Fee Related
-
2009
- 2009-01-08 JP JP2009002653A patent/JP4755698B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6107920A (en) * | 1998-06-09 | 2000-08-22 | Motorola, Inc. | Radio frequency identification tag having an article integrated antenna |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195136A (en) * | 2010-03-01 | 2011-09-21 | 日立电线株式会社 | Antenna and electrical equipment with same |
| CN102195136B (en) * | 2010-03-01 | 2014-10-01 | 日立金属株式会社 | Antenna and electrical equipment with same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009153146A (en) | 2009-07-09 |
| JP4755698B2 (en) | 2011-08-24 |
| CN1707855A (en) | 2005-12-14 |
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