WO2010100932A1 - 共振器アンテナ及び通信装置 - Google Patents
共振器アンテナ及び通信装置 Download PDFInfo
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- WO2010100932A1 WO2010100932A1 PCT/JP2010/001511 JP2010001511W WO2010100932A1 WO 2010100932 A1 WO2010100932 A1 WO 2010100932A1 JP 2010001511 W JP2010001511 W JP 2010001511W WO 2010100932 A1 WO2010100932 A1 WO 2010100932A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/064—Two dimensional planar arrays using horn or slot aerials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
- H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
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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
Definitions
- the present invention relates to a resonator antenna and a communication device suitable for microwaves and millimeter waves.
- Resonator antennas such as patch antennas and wire antennas operate when the element size corresponds to half the wavelength of electromagnetic waves propagating in a medium such as a dielectric.
- the relationship between the wavelength and frequency of electromagnetic waves has a dispersion relationship specific to the medium, and this medium depends on the permittivity and permeability in a normal insulating medium. Therefore, if the operating band and the substrate material to be used are determined, the size of the resonator antenna is also determined.
- metamaterials have been proposed in which conductor patterns and conductor structures are periodically arranged to artificially control the dispersion relation of electromagnetic waves propagating through the structure. And it is anticipated that a resonator antenna will be reduced in size by using a metamaterial.
- a metamaterial is formed by a conductor plane, a conductor patch arranged in parallel with the conductor plane, and a conductor via that connects the conductor patch to the conductor plane, and an antenna is manufactured using the metamaterial. It is described.
- An object of the present invention is to provide a resonator antenna that does not need to form a conductor via and can be miniaturized by using a metamaterial, and a communication device using the resonator antenna.
- a first conductor A second conductor that is at least partially opposed to the first conductor; A first opening provided in the first conductor; Wiring provided in the first opening and having one end connected to the first conductor; A feed line connected to the first conductor or the second conductor; A resonator antenna is provided.
- a first conductor A second conductor that is at least partially opposed to the first conductor; A first opening provided in the first conductor; An island-shaped third conductor provided separately from the first conductor in the first opening; A chip inductor provided on the third conductor and connecting the third conductor to the first conductor; A feed line connected to the first conductor or the second conductor; A resonator antenna is provided.
- a resonator antenna A communication processing unit connected to the resonator antenna; With The resonator antenna is A first conductor; A second conductor that is at least partially opposed to the first conductor; A first opening provided in the first conductor; Wiring provided in the first opening and having one end connected to the first conductor; A feed line connected to the first conductor or the second conductor; A communication device is provided.
- a resonator antenna A communication processing unit connected to the resonator antenna; With The resonator antenna is A first conductor; A second conductor that is at least partially opposed to the first conductor; A first opening provided in the first conductor; An island-shaped third conductor provided separately from the first conductor in the first opening; A chip inductor provided on the third conductor and connecting the third conductor to the first conductor; A feed line connected to the first conductor or the second conductor; A communication device is provided.
- a resonator antenna that does not require formation of a conductor via and can be miniaturized by using a metamaterial, and a communication device using the resonator antenna.
- (A) is a perspective view of the resonator antenna according to the first embodiment
- (b) is a sectional view of the resonator antenna
- (c) is a plan view of the resonator antenna.
- (A) is a top view of the layer in which the 1st conductor pattern used for the resonator antenna shown in FIG. 1 is formed
- (b) decomposes
- 2 is a graph showing dispersion curves comparing electromagnetic wave propagation characteristics of a medium in which unit cells shown in FIG. 1 are periodically arranged and a parallel plate waveguide. It is a figure explaining the modification of FIG.
- FIG. (A) is a perspective view of the resonator antenna which concerns on 2nd Embodiment
- (b) is sectional drawing which shows the structure of the resonator antenna shown to (a).
- (A) is a top view of the 2nd conductor pattern of the resonator antenna shown to Fig.7 (a)
- (b) is the plane which saw through the unit cell of the resonator antenna shown to Fig.7 (a) from the upper surface.
- (c) is a perspective view of this unit cell. It is a figure explaining the modification of FIG. It is a figure explaining the modification of 1st and 2nd embodiment.
- FIG. 11 It is a perspective view of the resonator antenna which concerns on 3rd Embodiment.
- A is sectional drawing of the resonator antenna shown in FIG. 11,
- (b) is a top view of the layer in which the 1st conductor pattern is provided.
- (A) is an equivalent circuit diagram of the unit cell shown in FIG. 12, and
- (b) is an equivalent of the unit cell when the unit cell shown in FIG. 12 is shifted by a half cycle a / 2 in the x direction in FIG. It is a circuit diagram. It is a figure for demonstrating the modification of the resonator antenna which concerns on 3rd Embodiment. It is a figure for demonstrating the modification of the resonator antenna which concerns on 3rd Embodiment.
- FIG. 1A is a perspective view of the resonator antenna 110 according to the first embodiment
- FIG. 1B is a cross-sectional view of the resonator antenna 110
- FIG. FIG. 2A is a plan view of a layer on which the first conductor pattern 121 used in the resonator antenna 110 shown in FIG. 1 is formed
- FIG. 2B is a layer shown in FIG. It is the figure which decomposed
- the resonator antenna 110 includes two conductive layers facing each other through a dielectric layer (for example, a dielectric plate).
- the first conductive pattern 121 as a first conductor and the second conductive layer as a second conductor.
- a two-conductor pattern 111, a plurality of first openings 104, a plurality of wirings 106, and a feeder line 115 are provided.
- the first conductor pattern 121 has a sheet shape, for example.
- the second conductor pattern 111 has, for example, a sheet shape, and at least a part (but may be substantially the whole) of the first conductor pattern 121 faces the first conductor pattern 121.
- the plurality of first openings 104 are provided in the first conductor pattern 121.
- the wiring 106 is provided in each of the plurality of first openings 104, and one end 119 is connected to the first conductor pattern 121.
- the feeder line 115 is connected to the first conductor pattern 121.
- the unit cells 107 including the first openings 104 and the wirings 106 are repeatedly arranged, for example, periodically. By repeatedly arranging the unit cells 107, portions other than the feeder line 115 of the resonator antenna 110 function as a metamaterial.
- the dielectric layer 116 is located between the conductor layer in which the first conductor pattern 121 is formed and the conductor layer in which the second conductor pattern 111 is formed.
- the dielectric layer 116 is a dielectric plate such as an epoxy resin substrate or a ceramic substrate.
- the first conductor pattern 121, the wiring 106, and the feeder line 115 are formed on the first surface of the dielectric plate
- the second conductor pattern 111 is formed on the second surface of the dielectric layer 116.
- the region where the unit cell 107 is provided is located inside the outer edge of the second conductor pattern 111.
- the first opening 104 is square or rectangular
- the first conductor pattern 121 is square or rectangular
- the length of each side is an integral multiple of the arrangement period of the first openings 104.
- the interval between the same vias is within 1 ⁇ 2 of the wavelength ⁇ of the electromagnetic wave assumed as noise. It is preferable to do so.
- “Repetition” includes a case where a part of the configuration is missing in any unit cell 107.
- “repetition” includes a case where the unit cell 107 is partially missing.
- “periodic” includes a case where some of the constituent elements are deviated in some unit cells 107 and a case where the arrangement of some unit cells 107 themselves is deviated.
- the unit cell 107 of the resonator antenna 110 further includes a third conductor pattern 105 as a third conductor.
- the third conductor pattern 105 is an island-like pattern provided separately from the first conductor pattern 121 in the first opening 104, and the other end 129 of the wiring 106 is connected.
- the unit cell 107 is constituted by a rectangular parallelepiped space including the first conductor pattern 121, the first opening 104, the wiring 106, the third conductor pattern 105, and the second conductor pattern 111, each of the regions facing each other. Yes.
- the unit cell 107 has a two-dimensional array. More specifically, the unit cell 107 is arranged at each lattice point of a square lattice having a lattice constant a. Therefore, the plurality of first openings 104 have the same center distance. The same applies to the examples shown in FIGS. 5A to 5D and FIGS. 6A and 6B described later. However, the unit cell 107 may be a one-dimensional array. The plurality of unit cells 107 have the same structure and are arranged in the same direction. In the present embodiment, the first opening 104 and the third conductor pattern 105 are square, and are arranged in the same direction so that their centers overlap each other.
- the wiring 106 has one end 119 connected to the center of one side of the first opening 104 and extends linearly perpendicular to the one side. The wiring 106 functions as an inductance element.
- one side of the lattice formed by the array of unit cells 107 has an integer number of unit cells 107.
- the unit cells 107 are arranged in a 3 ⁇ 3 two-dimensional array.
- the feeder line 115 is connected to the unit cell 107 located at the center of this side.
- a method for feeding power to the resonator antenna 110 using the feed line 115 is the same as that for the microstrip antenna. That is, a microstrip line is formed by the feeder line 115 and the second conductor pattern 111. Note that other power feeding methods may be employed.
- a communication device can be configured by connecting the feeder 115 to the communication processing unit 140.
- a capacitance C is generated between the third conductor pattern 105 and the second conductor pattern 111.
- a wiring 106 inductance L as a planar inductance element is electrically connected between the third conductor pattern 105 and the first conductor pattern 121. Therefore, the series resonant circuit 118 is shunted between the second conductor pattern 111 and the first conductor pattern 121, and the circuit is equivalent to the structure shown in FIG.
- FIG. 4 shows dispersion curves comparing electromagnetic wave propagation characteristics of a medium in which infinite unit cells shown in FIG. 1 are periodically arranged and a parallel plate waveguide.
- the solid line indicates the dispersion relationship when the unit cell 107 is periodically arranged in the resonator antenna 110 illustrated in FIG. 1.
- a broken line indicates a dispersion relation in a parallel plate waveguide formed by replacing the first conductor pattern 121 in FIG. 1 with a conductor pattern without the first opening 104 and the wiring 106.
- the resonator antenna 110 shown in FIG. 1 As the frequency increases, the wave number rapidly increases as compared with the parallel plate waveguide indicated by the broken line. Band gap appears. And when the frequency goes up again, the path span appears again. For the passband appearing on the lowest frequency side, the phase velocity is smaller than the phase velocity of the parallel plate waveguide indicated by the dotted line. For this reason, the resonator antenna 110 can be reduced in size.
- the frequency band of the stop band (band gap) is determined by the series resonance frequency of the series resonance circuit 118 due to inductance and capacitance.
- the inductance can be greatly increased by providing the wiring 106, so that the capacitance can be kept small. Therefore, since the third conductor pattern 105 can be downsized, the length a of the opening 104 and the unit cell 107 can be reduced as a result, and the resonator antenna 110 can be downsized.
- the band gap is shifted to the low frequency side, and the phase velocity in the passband appearing on the lowest frequency side is reduced.
- the number of necessary conductor layers is two, and no via is used. Therefore, the structure can be simplified and thinned, and the manufacturing cost can be reduced.
- the resonator antenna 110 uses the wiring 106, the inductance can be greatly increased as compared with the case where the inductance is formed by vias.
- the wiring 106 is linear, but the wiring 106 may have a meander shape as shown in FIG. 5 (a) or a spiral shape as shown in FIG. 5 (b). May be. Further, as shown in FIGS. 5C and 5D, the wiring 106 may be formed in a broken line shape.
- FIG. 2 shows an example in which one third conductor pattern 105 and one wiring 106 are formed in each first opening 104, but two or more third conductor patterns 105 are formed in each first opening 104.
- the wiring 106 can also be formed.
- the example shown in FIG. 6A is a plan view showing a layout of the first conductor pattern 121 when two third conductor patterns 105 and two wirings 106 are formed in the first opening 104.
- two sets of the third conductor pattern 105 and the wiring 106 are arranged in the first opening 104 so as to be line-symmetric.
- the first opening 104 is square, and the two third conductor patterns 105 are rectangular.
- the sides of the first opening 104 and the third conductor pattern 105 are parallel to each other.
- the two third conductor patterns 105 are arranged in line with each other about a straight line connecting the center of the first opening 104 and the center of one side of the first opening 104.
- the wiring 106 has one end 119 extending linearly from the center of one side of the first opening 104 perpendicularly to the one side, and the other end 129 connected to the center of the long side of the third conductor pattern 105. Yes.
- FIG. 6B is a plan view showing a layout of the first conductor pattern 121 when four third conductor patterns 105 and four wirings 106 are formed in the first opening 104.
- four sets of third conductor patterns 105 and wirings 106 are arranged at 90 ° intervals in the first opening 104 so as to be point-symmetric about the center of the first opening 104.
- the first opening 104 is square, and the four third conductor patterns 105 are also square.
- the sides of the first opening 104 and the third conductor pattern 105 are parallel to each other.
- the four third conductor patterns 105 are arranged in a point manner with the center of the first opening 104 as an axis.
- the wiring 106 has one end 119 extending straight from the corner of the first opening 104 in a direction of 45 ° with respect to one side of the first opening 104, and the other end 129 is connected to the corner of the third conductor pattern 105. is doing.
- the equivalent circuit per unit cell 107 has a plurality of series resonant circuits 118 connected in parallel as shown in FIG. 6 (c). become.
- the circuit is equivalent to the circuit shown in FIG. 3, and therefore one third conductor pattern 105 and one wiring 106 are formed in each first opening 104. The same characteristics can be obtained.
- the stop band can be widened or multi-banded.
- the layout of the first openings 104 is not limited to the square in FIG. 2A.
- the square first opening 104 may be a polygon such as a regular hexagon or a circle.
- the first openings 104 may be arranged in a triangular lattice shape.
- a conductive film is formed on both surfaces of a sheet-like dielectric layer. Then, a mask pattern is formed on one conductive film, and the conductive film is etched using the mask pattern as a mask. As a result, the conductive film is selectively removed, and the first conductor pattern 121, the plurality of first openings 104, the plurality of wirings 106, and the feeder line 115 are integrally formed.
- the other conductive film can be used as the second conductor pattern 111 as it is.
- the resonator antenna 110 may also be manufactured by sequentially forming a first conductor pattern 121, a dielectric film such as a silicon oxide film, and a second conductor pattern 111 on a glass substrate or a silicon substrate using a thin film process. Is possible. Alternatively, nothing may be provided in the space where the layers of the second conductor pattern 111 and the first conductor pattern 121 face each other (air may be used).
- FIG. 7A is a perspective view of the resonator antenna 110 according to the second embodiment
- FIG. 7B is a cross-sectional view showing the configuration of the resonator antenna 110 shown in FIG.
- the resonator antenna 110 according to the present embodiment has the same configuration as the resonator antenna 110 according to the first embodiment, except that the second conductor pattern 111 has a plurality of second openings 114. .
- the second opening 114 overlaps each of the plurality of wirings 106 in plan view.
- the second opening 114 is square or rectangular.
- the first conductor pattern 121 is square or rectangular, and the length of each side is an integral multiple of the arrangement period of the first openings 104.
- FIG. 8A is a plan view of the second conductor pattern 111 of the resonator antenna 110 shown in FIG.
- the second openings 114 are periodically arranged in the second conductor pattern 111.
- the period of the second opening 114 is a, which is equal to the length of one side of the unit cell 107 and the period of the first opening 104.
- FIG. 8 (b) is a plan view of the unit cell 107 of the resonator antenna 110 shown in FIG. 7 (a) seen through from above
- FIG. 8 (c) is a perspective view of the unit cell 107.
- all the wirings 106 are located in the second opening 114 in a plan view.
- the inductance per unit length of the wiring 106 can be increased.
- the wiring 106 can be made small in designing to a desired inductance value, the area occupied by the wiring 106 can be reduced, and as a result, the unit cell 107 can be miniaturized.
- FIG. 8B shows an example in which all of the wiring 106 is included in the second opening 114 when the unit cell 107 is seen through from above, but part of the wiring 106 is in the second opening 114 in plan view. It is also possible to design it so that it is located inside.
- FIGS. 9A and 9B are plan views showing an example in which a part of the wiring 106 is included in the second opening 114 when the unit cell 107 is seen through from above. Such a structure is effective in reducing the size of the second opening 114 and increasing the inductance.
- a chip inductor 500 is used instead of the wiring 106 as shown in the plan view of FIG. 10A and the cross-sectional view of FIG. Also good.
- FIG. 11 is a perspective view of the resonator antenna 110 according to the third embodiment, but the illustration of the feeder line 115 is omitted.
- 12A is a cross-sectional view of the resonator antenna 110 shown in FIG. 11, and
- FIG. 12B is a plan view of a layer in which the first conductor pattern 121 is provided.
- the resonator antenna 110 does not have the third conductor pattern 105 and is the same as the resonator antenna 110 according to the first embodiment except that the other end 129 of the wiring 106 is an open end. It is the composition.
- the wiring 106 functions as an open stub, and the portion of the second conductor pattern 111 facing the wiring 106 and the wiring 106 form a transmission line 101, for example, a microstrip line.
- the manufacturing method of the resonator antenna 110 according to this embodiment is the same as that of the first embodiment.
- a unit cell 107 including a region facing the first opening 104, the wiring 106, and the second conductor pattern 111 is configured.
- the unit cell 107 has a two-dimensional array in plan view. More specifically, the unit cell 107 is arranged at each lattice point of a square lattice having a lattice constant a. For this reason, the plurality of first openings 104 are arranged such that the distance between the centers is the same.
- the plurality of unit cells 107 have the same structure and are arranged in the same direction.
- the first opening 104 is square.
- the wiring 106 extends straight from the center of one side of the first opening 104 perpendicularly to the one side.
- FIG. 13A is an equivalent circuit diagram of the unit cell 107 shown in FIG.
- a parasitic capacitance CR is formed between the first conductor pattern 121 and the second conductor pattern 111.
- an inductance LR is formed in the first conductor pattern 121.
- the first conductor pattern 121 is divided into two equal parts by the first opening 104 and the wiring 106 is arranged at the center of the first opening 104 when viewed from the unit cell 107, so that the inductance L R is also divided into two equal parts around the wiring 106.
- the wiring 106 functions as an open stub, and the portion of the second conductor pattern 111 facing the wiring 106 and the wiring 106 form a transmission line 101, for example, a microstrip line.
- the other end of the transmission line 101 is an open end.
- FIG. 13B is an equivalent circuit diagram of the unit cell 107 when the unit cell 107 shown in FIG. 12 is shifted by a half cycle a / 2 in the x direction in FIG.
- the inductance LR is not divided by the wiring 106.
- the characteristics of the resonator antenna 110 shown in FIG. 11 do not change due to the difference in how the unit cells 107 are taken.
- the characteristics of the electromagnetic wave propagating in the resonator antenna 110 comprises a series impedance Z based on the inductance L R, determined by the admittance based on the transmission line 101 and the parasitic capacitance C R.
- the band gap is shifted to the low frequency side by increasing the line length of the transmission line 101.
- the band gap band shifts to the high frequency side.
- the unit cell 107 can be downsized without changing the lower limit frequency of the band gap. It becomes possible.
- the phase velocity in the passband that appears on the lowest frequency side also decreases.
- the unit cell 107 shown in FIG. 12 propagates through the medium in which the infinite number of unit cells 107 are periodically arranged rather than the wave number of the electromagnetic wave in the parallel plate waveguide.
- the condition that the wave number of electromagnetic waves is larger is satisfied.
- the wavelength of the electromagnetic wave in the resonator antenna 110 shown in FIG. 11 is shorter than the wavelength of the electromagnetic wave in the parallel plate waveguide. That is, by using the resonator antenna 110 shown in FIG. 11, the resonator can be miniaturized.
- the admittance Y is determined from the input admittance and capacitance C R of the transmission line 101.
- the input admittance of the transmission line 101 is determined by the line length of the transmission line 101 (that is, the length of the wiring 106) and the effective dielectric constant of the transmission line 101.
- the input admittance of the transmission line 101 at a certain frequency is capacitive or inductive depending on the length of the transmission line 101 and the effective dielectric constant.
- the effective dielectric constant of the transmission line 101 is determined by the dielectric material constituting the waveguide.
- the transmission line 101 has a degree of freedom, and the transmission line 101 can be designed so that the admittance Y is inductive in a desired band. In this case, the resonator antenna 110 shown in FIG. 11 behaves so as to have a band gap in the desired band.
- the line lengths of the wirings 106 in the respective first openings 104 are equal and one end 119 of the wiring 106 is used.
- the connection portions between the first conductor pattern 121 and the first conductor pattern 121 are repeatedly arranged, for example, periodically, and the position of the one end 119 in each unit cell 107 may be the same.
- the line length of the transmission line 101 that is, the length of the wiring 106 can be adjusted by appropriately changing the extending shape of the wiring 106.
- the wiring 106 is extended to form a meander.
- the wiring 106 extends so as to form a loop along the edge of the first opening 104.
- the wiring 106 extends so as to form a spiral.
- the design is easy if the periodic arrangement of the unit structure has the same shape, size and orientation of the wiring 106 in the first opening 104.
- at least one of the plurality of wirings 106 may be different from the others.
- the shapes of the wirings 106 are different from each other, and one of them is a polygonal line shape.
- the lengths of the wirings 106 are equal to each other.
- the position of the one end 119 of the wiring 106 is the same in each unit cell 107, the position of the one end 119 maintains periodicity.
- the first opening 104 does not have to be a square, and may be another polygon.
- the first opening 104 may be rectangular as shown in FIG. 18, or may be a regular hexagon as shown in FIG.
- the wiring 106 extends from the corner of the first opening 104 in a direction of 60 ° with respect to the side of the first opening 104.
- one end 119 of the wiring 106 may be connected to a corner of the first opening 104 having a square shape.
- the wiring 106 extends from the corner of the first opening 104 in a direction of 45 ° with respect to the side of the first opening 104.
- the width of the wiring 106 may change midway.
- one end 119 connected to the first conductor pattern 121 after the wiring 106 is wider than the other end 129 which is an open end.
- one end 119 is narrower than the other end 129.
- a plurality of wirings 106 may be provided in the first opening 104. In this case, it is preferable that the wirings 106 located in the same first opening 104 have different lengths.
- a branch wiring 109 branched from the wiring 106 may be provided in the first opening 104. In this case, the length from one end of the wiring 106 to the open end of the branch wiring 109 and the length of the wiring 106 are preferably different from each other.
- the unit cells 107 preferably have the same configuration and face the same direction.
- the shapes of the plurality of first openings 104 may be different from each other.
- the position of the one end 119 of the wiring 106 needs to have periodicity.
- the resonator antenna 110 that can be configured with two conductor layers without requiring vias and that can reduce the size of the unit cell 107.
- the equivalent circuit of the unit cell 107 has a plurality of transmission paths having different lengths. You will have in parallel. For this reason, the resonator antenna 110 has a band gap in a frequency band corresponding to the length of each transmission path, and thus can have a plurality of band gaps (multiband).
- FIG. 23 is a plan view showing a configuration of a resonator antenna 110 according to the fourth embodiment.
- the resonator antenna 110 is the same as the resonator antenna 110 shown in any of the first to third embodiments, except that the unit cells 107 are linearly arranged in a one-dimensional manner. It is a configuration.
- FIG. 23 shows a case where the configuration of the unit cell 107 is the same as that of the first embodiment.
- the resonator antenna 110 may have only one unit cell 107.
- FIG. 25 is a diagram for explaining the configuration of the resonator antenna 110 according to the fifth embodiment.
- the resonator antenna 110 according to this embodiment is the same as any one of the first to third embodiments except for the following points.
- FIG. 25 shows a case similar to that of the first embodiment.
- the lattice indicating the arrangement of the unit cells 107 has lattice defects.
- This lattice defect is located at the center of the side of the lattice to which the feeder line 115 is connected.
- the feeder line 115 extends through the lattice defect and is connected to the unit cell 107 located inside the outermost periphery.
- the same effect as any of the first to third embodiments can be obtained.
- the impedance of the resonator antenna 110 can be adjusted by adjusting the position and number of lattice defects. For this reason, the radiation efficiency of the resonator antenna 110 can be improved by matching the impedance of the feeder line 115 with the impedance of the resonator antenna 110.
- FIG. 26 is a diagram for explaining the configuration of the resonator antenna 110 according to the sixth embodiment.
- the resonator antenna 110 according to this embodiment is the same as any one of the first to third embodiments except for the feeding method.
- FIG. 26 shows the same case as in the first embodiment.
- the feeder line 115 is not provided, and a coaxial cable 117 is provided instead.
- the coaxial cable 117 is connected to the surface of the resonator antenna 110 where the second conductor pattern 111 is provided.
- the second conductor pattern 111 is provided with an opening, and a coaxial cable 117 is attached to the opening.
- the inner conductor of the coaxial cable 117 is connected to the first conductor pattern 121 via a through via provided in a region overlapping with the opening.
- the outer conductor of the coaxial cable 117 is connected to the second conductor pattern 111.
- power can be supplied to the resonator antenna 110 using a highly versatile coaxial cable 117.
- FIG. 27A is a perspective view showing the configuration of the resonator antenna 110 according to the seventh embodiment
- FIG. 27B is a cross-sectional view of the resonator antenna 110 shown in FIG.
- the resonator antenna 110 according to the present embodiment is the first except that the first opening 104, the third conductor pattern 105, and the wiring 106 are formed in the second conductor pattern 111 instead of the first conductor pattern 121. This is similar to any one of the sixth embodiment.
- FIG. 27 illustrates a case similar to that of the first embodiment.
- FIG. 28A is a perspective view showing a modification of the resonator antenna 110 shown in FIG. 27A
- FIG. 28B is a cross-sectional view of the resonator antenna 110 shown in FIG. is there.
- the resonator antenna 110 according to this modification has the same configuration as that of the resonator antenna 110 shown in FIG. 27A except that the second opening 114 is provided in the first conductor pattern 121.
- the configuration of the second opening 114 is the same as that of the second embodiment.
- the resonator antenna 110 according to this embodiment is the same as that of any of the first to sixth embodiments including an equivalent circuit, except that the layer structure is turned upside down. Therefore, the same effect as in any of the first to sixth embodiments can be obtained.
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Abstract
Description
d=λ0/(2×(εr×μr)1/2)
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に設けられ、一端が前記第1導体に接続している配線と、
前記第1導体又は前記第2導体に接続している給電線と、
を備える共振器アンテナが提供される。
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に前記第1導体から分離して設けられている島状の第3導体と、
前記第3導体に設けられ、前記第3導体を前記第1導体に接続するチップインダクタと、
前記第1導体又は前記第2導体に接続している給電線と、
を備える共振器アンテナが提供される。
前記共振器アンテナに接続している通信処理部と、
を備え、
前記共振器アンテナは、
第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に設けられ、一端が前記第1導体に接続している配線と、
前記第1導体又は前記第2導体に接続している給電線と、
を備える通信装置が提供される。
前記共振器アンテナに接続している通信処理部と、
を備え、
前記共振器アンテナは、
第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に前記第1導体から分離して設けられている島状の第3導体と、
前記第3導体に設けられ、前記第3導体を前記第1導体に接続するチップインダクタと、
前記第1導体又は前記第2導体に接続している給電線と、
を備える通信装置が提供される。
図1(a)は、第1の実施形態に係る共振器アンテナ110の斜視図であり、図1(b)は共振器アンテナ110の断面図であり、図1(c)は共振器アンテナ110の平面図である。図2(a)は図1に示した共振器アンテナ110に用いられる第1導体パターン121が形成されている層の平面図であり、図2(b)は図2(a)に示した層の各構成を分解して示した図である。
f/β=c/(2π・(εr・μr)1/2)・・・(1)
図7(a)は第2の実施形態に係る共振器アンテナ110の斜視図であり、図7(b)は図7(a)に示した共振器アンテナ110の構成を示す断面図である。本実施形態に係る共振器アンテナ110は、第2導体パターン111が複数の第2開口114を有している点を除いて、第1の実施形態に係る共振器アンテナ110と同様の構成である。第2開口114は、平面視において複数の配線106それぞれと重なっている。第2開口114を設けることにより、配線106と第2導体パターン111の間を鎖交する磁束が増加するため、これによって配線106の単位長さ当たりのインダクタンスが増加する。また第2開口114は正方形又は長方形である。そして第1導体パターン121は、正方形又は長方形であり、かつ各辺の長さが第1開口104の配列周期の整数倍である。
図11は、第3の実施形態に係る共振器アンテナ110の斜視図であるが、給電線115の図示は省略している。図12(a)は、図11に示した共振器アンテナ110の断面図であり、図12(b)は第1導体パターン121が設けられている層の平面図である。この共振器アンテナ110は、第3導体パターン105を有しておらず、配線106の他端129が開放端になっている点を除いて、第1の実施形態に係る共振器アンテナ110と同様の構成である。そして本実施形態では、配線106はオープンスタブとして機能しており、第2導体パターン111のうち配線106に対向する部分及び配線106が、伝送線路101、例えばマイクロストリップ線路を形成している。本実施形態に係る共振器アンテナ110の製造方法は、第1の実施形態と同様である。
図23は、第4の実施形態に係る共振器アンテナ110の構成を示す平面図である。本実施形態において、共振器アンテナ110は単位セル107が直線状に一次元に配列されている点を除いて、第1~第3の実施形態のいずれかに示した共振器アンテナ110と同様の構成である。なお図23は、単位セル107の構成が第1の実施形態と同様の場合を示している。
図25は、第5の実施形態に係る共振器アンテナ110の構成を説明するための図である。本実施形態に係る共振器アンテナ110は、以下の点を除いて第1~第3の実施形態のいずれかと同様である。なお図25は第1の実施形態と同様の場合を示している。
図26は、第6の実施形態に係る共振器アンテナ110の構成を説明するための図である。本実施形態に係る共振器アンテナ110は、給電方法を除いて第1~第3の実施形態のいずれかと同様である。なお図26は第1の実施形態と同様の場合を示している。
図27(a)は第7の実施形態に係る共振器アンテナ110の構成を示す斜視図であり、図27(b)は図27(a)に示した共振器アンテナ110の断面図である。本実施形態に係る共振器アンテナ110は、第1導体パターン121ではなく第2導体パターン111に第1開口104、第3導体パターン105、及び配線106が形成されている点を除いて、第1~第6の実施形態のいずれかと同様である。図27は、第1の実施形態と同様の場合を図示している。
Claims (24)
- 第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に設けられ、一端が前記第1導体に接続している配線と、
前記第1導体又は前記第2導体に接続している給電線と、
を備える共振器アンテナ。 - 請求項1に記載の共振器アンテナにおいて、
前記配線の他端は開放端である共振器アンテナ。 - 請求項2に記載の共振器アンテナにおいて、
前記配線、前記第1開口、及び前記第1導体は、一体的に形成されている共振器アンテナ。 - 請求項2又は3に記載の共振器アンテナにおいて、
前記配線と前記第2導体のうち前記配線に対向する部分が伝送線路を形成している共振器アンテナ。 - 請求項4に記載の共振器アンテナにおいて、
前記伝送線路はマイクロストリップ線路である共振器アンテナ。 - 請求項1~5のいずれか一つに記載の共振器アンテナにおいて、
前記第1開口内に位置し、前記配線から分岐している分岐配線を備える共振器アンテナ。 - 請求項1に記載の共振器アンテナにおいて、
前記第1開口の中に前記第1導体から分離して設けられ、前記配線の他端が接続している島状の第3導体を備える共振器アンテナ。 - 請求項7に記載の共振器アンテナにおいて、
前記第1導体、前記第1開口、前記配線、及び前記第3導体は一体的に形成されている共振器アンテナ。 - 請求項7又は8に記載の共振器アンテナにおいて、
前記第1開口内に複数の前記第3導体を有しており、かつ、前記複数の第3導体毎に前記配線を有している共振器アンテナ。 - 請求項7~9のいずれか一つに記載の共振器アンテナにおいて、
前記第2導体に設けられ、平面視において前記配線と重なっている第2開口を備える共振器アンテナ。 - 請求項1~10のいずれか一つに記載の共振器アンテナにおいて、
前記第1開口及び前記配線は複数設けられ、
前記第1開口及び前記配線を含む単位セルが繰り返し配列されている共振器アンテナ。 - 請求項11に記載の共振器アンテナにおいて、
前記複数の配線の長さが互いに等しい共振器アンテナ。 - 請求項11又は12に記載の共振器アンテナにおいて、
前記複数の配線は、前記一端が周期的な配列を有している共振器アンテナ。 - 請求項11~13のいずれか一つに記載の共振器アンテナにおいて、
前記複数の第1開口は互いに同一の形状を有していて同じ向きを向いており、かつ周期的に配置されている共振器アンテナ。 - 請求項14に記載の共振器アンテナにおいて、
前記単位セルは互いに同一の構成を有しており、かつ同じ向きを向いている共振器アンテナ。 - 請求項11~15のいずれか一つに記載の共振器アンテナにおいて、
前記第1開口は正方形又は長方形であり、
前記第1導体及び前記第2導体のいずれか一方は、正方形又は長方形であり、かつ各辺の長さが前記第1開口の配列周期の整数倍である共振器アンテナ。 - 請求項11~16のいずれか一つに記載の共振器アンテナにおいて、
前記複数の単位セルが2次元配列を有している共振器アンテナ。 - 請求項11~16のいずれか一つに記載の共振器アンテナにおいて、
前記複数の単位セルが1次元配列を有している共振器アンテナ。 - 請求項1~18のいずれか一つに記載の共振器アンテナにおいて、
前記配線は直線状又は折れ線形状に延伸している共振器アンテナ。 - 請求項1~19のいずれか一つに記載の共振器アンテナにおいて、
前記配線はミアンダ、ループ、又はスパイラルを形成するように延伸している共振器アンテナ。 - 第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に前記第1導体から分離して設けられている島状の第3導体と、
前記第3導体に設けられ、前記第3導体を前記第1導体に接続するチップインダクタと、
前記第1導体又は前記第2導体に接続している給電線と、
を備える共振器アンテナ。 - 請求項1~21のいずれか一つに記載の共振器アンテナにおいて、
前記開口は、多角形を有している共振器アンテナ。 - 共振器アンテナと、
前記共振器アンテナに接続している通信処理部と、
を備え、
前記共振器アンテナは、
第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に設けられ、一端が前記第1導体に接続している配線と、
前記第1導体又は前記第2導体に接続している給電線と、
を備える通信装置。 - 共振器アンテナと、
前記共振器アンテナに接続している通信処理部と、
を備え、
前記共振器アンテナは、
第1導体と、
前記第1導体に少なくとも一部が対向している第2導体と、
前記第1導体に設けられた第1開口と、
前記第1開口の中に前記第1導体から分離して設けられている島状の第3導体と、
前記第3導体に設けられ、前記第3導体を前記第1導体に接続するチップインダクタと、
前記第1導体又は前記第2導体に接続している給電線と、
を備える通信装置。
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US20110304521A1 (en) | 2011-12-15 |
JP5617836B2 (ja) | 2014-11-05 |
US8773311B2 (en) | 2014-07-08 |
CN102341961B (zh) | 2015-05-27 |
JPWO2010100932A1 (ja) | 2012-09-06 |
CN102341961A (zh) | 2012-02-01 |
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