CN1543011A - Independently tunable multiband meanderline loaded antenna - Google Patents
Independently tunable multiband meanderline loaded antenna Download PDFInfo
- Publication number
- CN1543011A CN1543011A CNA2003101025281A CN200310102528A CN1543011A CN 1543011 A CN1543011 A CN 1543011A CN A2003101025281 A CNA2003101025281 A CN A2003101025281A CN 200310102528 A CN200310102528 A CN 200310102528A CN 1543011 A CN1543011 A CN 1543011A
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- ground plane
- top board
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
Abstract
An antenna for transmitting and receiving radio frequency energy. The antenna comprises a conductive top plate formed in the shape of a spiral. In one embodiment a sidewall meanderline extends from an edge of the top plate in the direction of a ground plane. A shorting meanderline connects the top plate and the ground plane. A first region of the top plate overlies the ground plane. A second region of the top plate extends beyond the ground plane. Tuning is provided by adjusting the length and other dimensions of the meanderlines.
Description
The application number that the application requires on October 22nd, 2002 to submit to is the priority of 60/420,214 provisional application.
Technical field
The present invention relates generally to a kind of antenna that is used to receive and dispatch radiofrequency signal, particularly is operated in the antenna on the multiband.
Background technology
As everyone knows, the performance of antenna depends on the relation between the signal wavelength of the physical parameter (as the length of linear antenna and the diameter of coil antenna) of the material composition of element of its size, shape, composition antenna and some antenna and antenna receiving-sending.Above-mentioned relation determines the running parameter of some antennas, comprises that input impedance, gain, direction, polarizations direction are with antenna pattern.Usually for the antenna that can work, minimum physical antenna size (or electric effective minimum dimension) must be similar to the quarter-wave of operating frequency, this will greatly suppress the energy loss in the resistive loss, and make the energy that transmits and receives realize maximum.The most frequently used is quarter-wave aerial and half-wavelength antenna.
Developing rapidly of wireless telecommunications system and system caused (lessobtrusive), more high efficiency can being operated on broadband or the multiband undersized, that do not give prominence to, and/or in the following very big demand of the antenna of work of multimode (that is, optional radiation diagram or optional polarizations direction) state.The communication apparatus of the present art as hand-held set, can not provide enough spaces for traditional quarter-wave aerial and half-wavelength antenna element.Therefore be operated in the frequency range of expectation and provide the antenna of less physical size of operating characteristic (input impedance, antenna pattern, polarizations direction etc.) of other expectation especially welcome.
As is known to the person skilled in the art, at least for unary antenna, between the physical size of antenna and antenna gain, there is directly relation, its relational expression is: gain=(β R) ^2+2 β R, wherein R is the radius that comprises the ball of antenna, and β is a propagation factor.Therefore the increase of gain requires the bigger antenna of physical size, and the user always requires the less antenna of physical size.As another restraining factors, for simplified system designs and strives for minimum cost, device designer and Systems Operator tend to use the antenna that can realize multiband efficiently and/or broadband operation, thereby allow the communication apparatus can be in this type of service that realizes on the multiple different frequency range on various wireless service functions or the broadband.Finally, gain is owing to the known relationship between above-mentioned operating frequency of antenna and the effective antenna length (being represented by wavelength) is restricted.That is, all have particular geometric configuration, and promptly effective antenna length is that the antenna gain of the quarter-wave quarter-wave aerial of operating frequency is a constant on operating frequency.
Basic antenna a kind of commonly used in current many application is the half wavelength dipoles sub antenna.Its radiation diagram is common annular (donut shape), and wherein most energy is all along the azimuth direction radiation, and the radiation on elevation direction of energy seldom.The desired frequency band of some communication apparatus is 1710 to 1990MHz and 2110 to 2200MHz.The half wavelength dipoles sub antenna is about 3.11 inches long at 1900MHz, is 3.45 inches long at 1710MHz, is about 2.68 inches long at 2200MHz.The feature yield value is about 2.15dBi.
/ 4th unipole antennas that are installed on the ground plane are derived from half wavelength dipole.The physical size of antenna is a quarter-wave, but antenna is worked as the half wavelength dipoles sub antenna because of ground plane.Therefore, the antenna pattern that is installed in 1/4th unipole antennas on the ground plane is identical with the half wavelength dipoles sub antenna, and has the feature yield value that is about 2dBi.
Public free space (promptly not on ground plane) loop aerial (diameter is about 1/3rd wavelength) also presents the identical annular antenna pattern along radial axis, has the yield value that is about 3.1dBi.At 1900MHz, this antenna has about 2 inches diameter.The input impedance of typical loop antenna is 50 ohm, and good matching properties is provided.
Well-known patch antenna (patch antenna) provides the hemisphere overlay area of the orientation that yield value is about 4.7dBi.Though it is less to compare 1/4th antennas or half-wavelength antenna, patch antenna has narrow relatively bandwidth.
Because the favourable performance of 1/4th antennas and half-wavelength antenna, traditional antenna is usually configured to make the length of antenna similar to the quarter-wave of radiation frequency, and antenna is operated on the ground plane.These sizes allow antenna to be easy to be energized and moving on the resonance frequency or near it, have suppressed the energy loss in the resistive loss (resistive loss) and have made emittance realize maximum.Yet, when operating frequency increase/when reducing, operation wavelength increases/reduces, thereby the size of antenna increases pro rata/reduces.
Therefore, Antenna Design person has begun to efforts be made so that the so-called slow wave structure (slow wave structure) that is not equal to effective electric size with structure physical size wherein.With the elimination is to obtain above-mentioned favourable radiation to require the effective dimensions of antenna to need and the similar restriction of half-wavelength (perhaps being quarter-wave on ground plane) with low loss characteristic.Usually, slow wave structure is meant the structure of wherein capable phase velocity of wave less than the light velocity of free space.Velocity of wave is to consider the wavelength of material dielectric constant and magnetic permeability and the product of frequency, i.e. c/ ((sqrt (ε
r) sqrt (μ
r))=λ f.Because the frequency of transmitting in slow wave structure remains unchanged, if velocity of wave is lower than (being that phase velocity is lower than) light velocity, the wavelength in this structure just is lower than the wavelength in the free space.Therefore, for example, a half-wavelength slow wave structure is just short than the half-wavelength structure with the ripple of the light velocity (c) propagation.This slow wave structure does not have the relation between traditional physical size and resonance frequency and the wavelength.This slow wave structure can be used as antenna element or aerial radiation structure.
Because the phase velocity of wave of propagating in slow wave structure is lower than the light velocity of free space, effective electrical length of these structures (electrical length) is greater than the effective electrical length with the light velocity propagation wave structure.Therefore, the resonance frequency of slow wave structure has correspondingly been increased.Like this, if two arrangement works in same resonance frequency, as half wavelength dipole, the structure of transmitting slow wave so will be less than the physical size with light velocity transmission wave structure as all.
Summary of the invention
In a specific embodiment, antenna of the present invention is configured to be connected with ground plane with the relation of apart, is used to receive and dispatch radio-frequency (RF) energy.This antenna comprises by one or more edge limited spiral-shaped top board; The short-circuit component (comprising a meander line conductor in a preferred embodiment) of top board and ground plane is extended, is used to be electrically connected to direction from top board along ground plane; With the sidewall that extends along the ground plane direction from the edge of top board.
Description of drawings
Hereinafter will disclose aforementioned and other characteristics of the present invention better for more detailed description of the present invention.As shown in drawings, wherein in each accompanying drawing identical Reference numeral represent components identical.Accompanying drawing does not need designated size, but focuses on representing principle of the present invention.
Accompanying drawing 1 is the perspective view of the antenna that forms of instruction according to the present invention;
Accompanying drawing 2 and accompanying drawing 3 are respectively according to another embodiment of the invention and the top view and the end view of the antenna that forms;
Accompanying drawing 4 shows the profile of the meander line in the antenna of describing in the accompanying drawing 2,3;
Accompanying drawing 5 is equivalent circuit diagrams of antenna shown in the accompanying drawing 2,3;
Accompanying drawing 6-8 is according to a second embodiment of the present invention and the various views of the antenna that forms.
Embodiment
Before specific antenna equipment of the present invention is described in detail, at first should clear and definite the present invention carry out creative and non-obvious combination to element.Therefore, element of the present invention is represented by element traditional in the accompanying drawing, details related to the present invention only is shown, and does not provide architectural feature well known by persons skilled in the art, in order to avoid influence disclosure of an invention.
Antenna of the present invention comprises that one is connecting one or more meander line design of mini (compact) spiral type radiator on it, thereby so that best running parameter to be provided less than the volume that is installed in the quarter-wave structure on the ground plane.Can easily make described antenna by printing blank metallic plate.The shape of the printing area that some is specific can be made as required and meander line is pasted in place.The small size of antenna allows it to be installed in the application that hand-hold communication appliance and other space be of great rarity.In another specific embodiment, antenna of the present invention can be by a conductor layer on the medium substrate connects up or etching forms to being placed in.
Accompanying drawing 1 shows the perspective view of the antenna 10 in one embodiment of the present of invention.Antenna 10 is made by the conductor material with relative thin (as: copper) thin slice and is comprised a top board 11 that further comprises inside spin section 12 and external spiral section 13.Select as another kind, top board 11 comprises wherein have been removed near the conductor material layer of thin slice center to the material of conductor material chip edge.In a specific embodiment, described material is removed, on top board 11, to form spiral slit.
By feeder line track 30 (being formed on the medium substrate 14) and 32 pairs of antenna 10 feed signals of antenna feed or from its received signal.Usually, physical connection is to medium substrate on zone 33 for feed connector (not shown in figure 1), and wherein said feed connector comprises feed pin (feed pin) that is used to be connected electrically to feeder line track 30 and the grounding pin that is connected electrically to ground plane 16.The embodiment of Fig. 1 lacks the meander line structure among some embodiment described hereinafter.
Fig. 2 and 3 is respectively top view and the front view of antenna 10 another embodiment, comprises meander line element 22 and 40 (latter is not shown in Figure 1).This meander line 40 is electrically connected between the zone 41 and ground plane 16 of top board 11.As 3 fine explanations of accompanying drawing, meander line 22 comprises vertical component 43 and by wherein extending and being configured to the support arm 44 (arm) of physical connection to the zone 23 of medium substrate; This support arm 44 is not electrically connected with ground plane 16.
Accompanying drawing 4 shows along the profile of the preferred structure of the meander line 40 of Fig. 2 midplane 4-4.As shown in the figure, top 42 ground connection of meander line 40.In a specific embodiment, distance ' ' d ' ' is about 1 inch.
Fig. 5 shows the equivalent circuit diagram of antenna 10.Electric capacity between capacitor 50 expression external spiral sections 13 and the ground plane 16.Electric capacity between capacitor 52 expression inside spin sections 12 and the ground plane 16.Capacitor 50 and 52 all is subjected to the influence of the distance between top board 11 and the ground plane 16.Simultaneously, when border 20 (participation Fig. 1) with respect to antenna edge 18 (or edge 24) when being conditioned, capacitor 50 and 52 numerical value also change thereupon.Therefore change a kind of technology of these electric capacity and antenna performance usually, regulate the distance between border 20 and the antenna edge 18 (or border 24) exactly.
Electric capacity between capacitor 54 expression inside spin sections 12 and the external spiral section 13.Reference numeral 56 expression meander lines 40 short dots to ground.Meander line element 22 is by Reference numeral 58 expressions, and it is earth-free, but shows as open circuit.Usually, as shown in Figure 5, the element on antenna feed 32 right sides influences the low-frequency range performance, and the element in antenna feed 32 left sides influences the high band performance.
In one embodiment, antenna 10 is worked or is carried out resonance at the cellular band of about 880-960MHz (low frequency) and in the person communication system frequency range (high frequency) of 1.710-1.990Ghz.The antenna pattern of low-frequency range is omnidirectional's (identical doughnut), and mainly is level at high frequency, that is, energy is radiation in the horizontal direction mainly.By regulating the physical characteristic of meander line 40, as its length, realization is tuning to high band, so that near for example frequency range the 1.5GHz of global positioning system frequency range is realized resonance.The shape and size that can also change meander line 22 comprise the change of the operating characteristic of operating frequency to realize antenna 10.
In one embodiment, the size of antenna is about and is about 0.4 inch, and wide about 0.4 inch.
The top view of accompanying drawing 6 shows the resonance condition of antenna 70 three frequency ranges.Usually, antenna 70 comprises the inside spin section 12 and the external spiral section 13 of the antenna 10 shown in the accompanying drawing 1.Yet antenna 70 is compared with antenna 10 and is also comprised additional and improved meander line.
Accompanying drawing 7 shows the front view of antenna 70.Antenna 70 comprises meander line 40 and antenna feed 32, and it is with the antenna 10 same way as work above to illustrate basically.Antenna 70 also comprises the meander line element 71 with the section 72 and 73 that is electrically connected.This section 72 is extended from top board 11, and section 73 is set on the medium substrate 14 or near medium substrate 14, still be free of attachment to ground plane 16 on electric.
The profile along accompanying drawing 6 midplane 8-8 of accompanying drawing 8 further illustrates meander line 71.As shown in the figure, meander line 71 is set on the medium substrate 14, but is not electrically connected with ground plane 16.Distances dd is about 0.3 inch in one embodiment.
Usually, according to instruction of the present invention, the antenna shown in the accompanying drawing 1 can be by increasing the meander line element, and/or the length of regulating illustrated meander line element, and by tuning to be operated on a plurality of frequency ranges.Can generate additional working frequency range by increasing the meander line element.Can be by regulating some specific meander line element in the operation that improves under the situation of the operation that does not influence other frequency range on the frequency range.Therefore antenna provides the adjustable operating frequency of separating.Physical characteristic or size that well-known antenna of the prior art changes antenna can influence all resonance frequencys of antenna usually.Antenna of the present invention is not limited.Simultaneously, the size (for example: length, width, apart from the height of ground plane) of demarcating (scaling) antenna of the present invention influences all resonance frequencys usually.
A kind of antenna structure of working on one or more frequency ranges of being used for has been described.Concrete application of the present invention and example are illustrated also and illustrate that the principle of Pi Luing provides in many ways and realized principle of the present invention with multiple antenna structure here.May have various versions within the scope of the invention.The present invention is only defined by the appended claims.
Claims (48)
1. one kind is connected to ground plane, is used to send and the antenna of received RF energy, comprising:
By one or more edge limited spiral top board;
The short-circuit component that extend, that be used to be electrically connected top board and ground plane along the ground plane direction from this top board; And
At the sidewall of ground plane direction from the extension of top board edge.
2. antenna according to claim 1, wherein, when antenna was worked with ground plane, the part of this top board was on ground plane.
3. antenna according to claim 2, wherein, the area of the top plate portion on ground plane is adjustable, to change the performance of antenna.
4. antenna according to claim 2, wherein, the top plate portion on ground plane comprises the first area of top board, short-circuit component extends from this first area, and described top plate portion does not comprise the second area of sidewall from the top board of its extension.
5. antenna according to claim 1, wherein, ground plane comprises the conductor material on the first area that is arranged on substrate, and conductor material breaks away from from the second area of substrate, and sidewall is set on the second area.
6. antenna according to claim 1, wherein, top board has the inside spin section that is connected to the external spiral section.
7. antenna according to claim 1, wherein, top board comprises the continuous helical of being made by conductor material.
8. antenna according to claim 1, wherein, short-circuit component comprises the meander line conductor.
9. antenna according to claim 8, wherein, the meander line conductor comprises the transmission line of the elongation with curved structure.
10. antenna according to claim 8, wherein, the meander line conductor comprises a transmission line that further comprises the elongation of first section and second section, wherein first and second sections are electrically connected and are arranged essentially parallel to top board and are provided with.
11. antenna according to claim 10, described antenna is installed on the ground plane, and wherein, first and second sections are arranged essentially parallel to ground plane, and are set between top board and the ground plane.
12. antenna according to claim 1 also comprises the electricity supply element that is connected to top board.
13. antenna according to claim 1 also comprises electricity supply element, wherein top board has inside spin section and external spiral section, and wherein electricity supply element is set at the top of external spiral section.
14. antenna according to claim 13, described antenna be set at one further comprise ground plane and with the medium substrate of the metal feeder section of ground plane insulation on, wherein feeder section and electricity supply element are electrically connected.
15. antenna according to claim 14, wherein, electricity supply element comprises the conductor belt that extends to the conductor feeder section on the medium substrate from top board.
16. antenna according to claim 1, wherein, the edge of sidewall and top board forms the right angle basically.
17. an antenna comprises:
Ground plane;
Comprise the spiral top board in first and second zones, wherein the first area is positioned on the ground plane;
Electricity supply element with the electric communication of top board;
The first tortuous conductor from the top board extension; And
The second tortuous conductor from the top board extension.
18. antenna according to claim 17, wherein, ground plane comprises the medium substrate of the conductor material on the first area with the substrate of being arranged on; And conductor material breaks away from from the second area of substrate; And the first area of top board is substantially on the first area of substrate.
19. antenna according to claim 18, wherein, the first meander line conductor extends from the first area of top board, and comprises the conductor of the meander-shaped of elongation, and wherein the first tortuous conductor is electrically connected top board and ground plane.
20. antenna according to claim 17, wherein, top board also comprises the second area at the edge that extends beyond ground plane, and the second meander line conductor is included in first conductor element that the edge of second area extends and second conductor element that extends from first conductor element.
21. antenna according to claim 20, wherein, the angle that forms between the second area of first conductor element and top board is about 90 °.
22. antenna according to claim 20, wherein, the angle between first conductor element and second conductor element is about 90 °.
23. a ground plane that is connected to apart, be used to transmit and receive the antenna of radio-frequency (RF) energy, comprise:
Spiral top board with one or more edges;
From the top board edge along the sidewall that extends towards the direction of ground plane; And
Wherein, the ground plane setting is faced in the first area of top board when working together with ground plane, and the second area of top board extends the edge of ground plane.
24. antenna according to claim 23, wherein, sidewall extends the edge of ground plane.
25. antenna according to claim 24 also comprises the short-circuit component that is used to be electrically connected top board and ground plane.
26. antenna according to claim 25, wherein, short-circuit component comprises the meander line conductor that extends from top board.
27. antenna according to claim 23 also comprises the medium substrate with first and second areas of dielectric, wherein, ground plane is set on first areas of dielectric, and first top panel area is in the face of the first areas of dielectric setting.
28. antenna according to claim 27, wherein, sidewall is on second areas of dielectric.
29. an antenna that is connected to ground plane, is used to transmit and receive radio-frequency (RF) energy comprises:
Spiral top board;
The first meander line element, its direction at ground plane is extended from top board, to connect top board and ground plane;
The second meander line element from the top board extension; And
The sidewall that extends from the edge of top board.
30. antenna according to claim 29, wherein, the distance between top board and the ground plane is selected as realizing the performance parameter of the antenna expected.
31. antenna according to claim 29, wherein, one of top board zone covers ground plane when antenna is designed to work with ground plane.
32. antenna according to claim 31 wherein, is regulated the area of described overlay area, to change the performance characteristics of antenna.
33. antenna according to claim 32, wherein, the first meander line element is set at this overlay area.
34. antenna according to claim 29, wherein, top board has the inside spin section that is electrically connected with the external spiral section.
35. antenna according to claim 29, wherein, top board has the continuous helical of being made by conductor material.
36. antenna according to claim 29, wherein, the second meander line element extends from top board on the direction of ground plane, and has the basic L shaped meander line element that is.
37. antenna according to claim 36, wherein, the second meander line element also comprises first section of extending from top board and from second section of first section extension, wherein second section length is less than the length and the width of top board.
38. antenna according to claim 29, wherein, the first meander line element comprises the tortuous transmission line of an elongation, and this complications transmission line comprises the section that is arranged essentially parallel to top board.
39. antenna according to claim 29, wherein, the first meander line element comprises the transmission line of an elongation, and this transmission line comprises at least two sections that are arranged essentially parallel to the connection of top board.
40. antenna according to claim 29, this antenna are configured to and the ground plane apart, wherein the first meander line element comprises the section of two substantially parallel elongations, and the section of described elongation is arranged essentially parallel to ground plane and is arranged essentially parallel to top board.
41. antenna according to claim 29 also comprises electricity supply element.
42. according to the described antenna of claim 41, wherein, electricity supply element extends from top board on the direction of ground plane, and wherein ground plane is set on the medium substrate, and wherein medium substrate comprises and ground plane metal feeder section insulation, that be used to be connected electrically to electricity supply element.
43. antenna according to claim 29, wherein, the second meander line element is positioned between the sidewall and the first meander line element.
44. antenna according to claim 29, wherein, sidewall comprises and meet at right angles substantially first section of being provided with and be connected to first section and basic and first section rectangular second section of top board.
45. a ground plane that is connected to apart, be used to transmit and receive the antenna of radio-frequency (RF) energy, comprise:
Wherein limit the conductor sheet in a slit, this conductor sheet also comprises the one or more edges and first and second zones;
When antenna and ground plane are worked together from this conductor sheet edge at the sidewall that extends towards the direction of ground plane; And
Wherein, when working with ground plane, the first area is in the face of the ground plane setting, and second area extends the edge of ground plane.
46. according to the described antenna of claim 45, wherein sidewall extends from second area.
47. antenna according to claim 24 also comprises from the first area and extending to be electrically connected the short-circuit component of top board and ground plane.
48. according to the described antenna of claim 46, wherein, this slit-shaped is helically shaped.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42021402P | 2002-10-22 | 2002-10-22 | |
| US60/420,214 | 2002-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1543011A true CN1543011A (en) | 2004-11-03 |
| CN100570948C CN100570948C (en) | 2009-12-16 |
Family
ID=32176534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101025281A Expired - Fee Related CN100570948C (en) | 2002-10-22 | 2003-10-22 | Self-tuning multiband meander line loaded antenna |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4431360B2 (en) |
| KR (1) | KR101049724B1 (en) |
| CN (1) | CN100570948C (en) |
| TW (1) | TWI338411B (en) |
| WO (1) | WO2004038859A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740857A (en) * | 2008-11-17 | 2010-06-16 | 财团法人车辆研究测试中心 | Dual-frequency miniaturized antenna and design method thereof |
| CN102593583A (en) * | 2011-01-18 | 2012-07-18 | 致伸科技股份有限公司 | Plane-type double-frequency antenna |
| CN101471484B (en) * | 2007-12-27 | 2012-07-18 | 耀登科技股份有限公司 | Multi-frequency antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI118872B (en) * | 2005-10-10 | 2008-04-15 | Pulse Finland Oy | Built-in antenna |
| KR100788283B1 (en) * | 2005-11-24 | 2007-12-27 | 엘지전자 주식회사 | Broadband antenna and electronic equipment comprising it |
| US20100109968A1 (en) * | 2007-03-29 | 2010-05-06 | Panasonic Corporation | Antenna device and portable terminal device |
| JPWO2009031229A1 (en) * | 2007-09-06 | 2010-12-09 | パナソニック株式会社 | Antenna element |
| KR100901496B1 (en) * | 2007-10-19 | 2009-06-08 | 한양대학교 산학협력단 | Ultra Wide Band Monopole Internal Antenna |
| US8514138B2 (en) | 2011-01-12 | 2013-08-20 | Mediatek Inc. | Meander slot antenna structure and antenna module utilizing the same |
| US20120214424A1 (en) * | 2011-02-23 | 2012-08-23 | Mediatek Inc. | Single Input/Multiple Output (SIMO) or Multiple Input/Single Output (MISO) or Multiple Input/Multiple Output (MIMO) Antenna Module |
| TWI581506B (en) * | 2013-03-20 | 2017-05-01 | 群邁通訊股份有限公司 | Antenna structure |
| CN104994460B (en) * | 2015-07-08 | 2018-04-24 | 中国电子科技集团公司第五十四研究所 | A kind of method for measuring Feed Horn mouth diaphragm seal transmission loss |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6408190B1 (en) * | 1999-09-01 | 2002-06-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Semi built-in multi-band printed antenna |
| KR100368939B1 (en) * | 2000-10-05 | 2003-01-24 | 주식회사 에이스테크놀로지 | An internal antenna having high efficiency of radiation and characteristics of wideband and a method of mounting on PCB thereof |
| US6573869B2 (en) * | 2001-03-21 | 2003-06-03 | Amphenol - T&M Antennas | Multiband PIFA antenna for portable devices |
| US6922172B2 (en) * | 2001-04-23 | 2005-07-26 | Yokowo Co., Ltd. | Broad-band antenna for mobile communication |
| KR100533624B1 (en) * | 2002-04-16 | 2005-12-06 | 삼성전기주식회사 | Multi band chip antenna with dual feeding port, and mobile communication apparatus using the same |
| KR20030064717A (en) * | 2003-07-15 | 2003-08-02 | 학교법인 한국정보통신학원 | An internal triple-band antenna |
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2003
- 2003-10-21 WO PCT/KR2003/002211 patent/WO2004038859A1/en active Search and Examination
- 2003-10-22 JP JP2003362181A patent/JP4431360B2/en not_active Expired - Fee Related
- 2003-10-22 TW TW092129338A patent/TWI338411B/en not_active IP Right Cessation
- 2003-10-22 CN CNB2003101025281A patent/CN100570948C/en not_active Expired - Fee Related
- 2003-10-22 KR KR1020030073834A patent/KR101049724B1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471484B (en) * | 2007-12-27 | 2012-07-18 | 耀登科技股份有限公司 | Multi-frequency antenna |
| CN101740857A (en) * | 2008-11-17 | 2010-06-16 | 财团法人车辆研究测试中心 | Dual-frequency miniaturized antenna and design method thereof |
| CN102593583A (en) * | 2011-01-18 | 2012-07-18 | 致伸科技股份有限公司 | Plane-type double-frequency antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4431360B2 (en) | 2010-03-10 |
| KR20040035581A (en) | 2004-04-29 |
| TWI338411B (en) | 2011-03-01 |
| JP2004147327A (en) | 2004-05-20 |
| WO2004038859A1 (en) | 2004-05-06 |
| CN100570948C (en) | 2009-12-16 |
| TW200409402A (en) | 2004-06-01 |
| KR101049724B1 (en) | 2011-07-19 |
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