WO2011152055A1 - 構造体 - Google Patents
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- WO2011152055A1 WO2011152055A1 PCT/JP2011/003110 JP2011003110W WO2011152055A1 WO 2011152055 A1 WO2011152055 A1 WO 2011152055A1 JP 2011003110 W JP2011003110 W JP 2011003110W WO 2011152055 A1 WO2011152055 A1 WO 2011152055A1
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- 239000004020 conductor Substances 0.000 claims abstract description 367
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- -1 for example Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/28—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0236—Electromagnetic band-gap structures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0237—High frequency adaptations
- H05K1/024—Dielectric details, e.g. changing the dielectric material around a transmission line
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0141—Liquid crystal polymer [LCP]
Definitions
- the present invention relates to a structure showing characteristics as a metamaterial.
- the propagation characteristics of electromagnetic waves can be controlled by periodically arranging conductor patterns having a specific structure (hereinafter referred to as metamaterials).
- metamaterials For example, the antenna can be reduced in size and thickness.
- Metamaterials include the so-called right-handed system, left-handed system, and combined right-handed / left-handed system.
- Patent Document 1 there is a technique described in Patent Document 1 as a technique of using a right-hand / left-hand composite metamaterial as an array antenna (leakage wave antenna).
- a liquid crystal layer is disposed between two conductors constituting a capacity component of a metamaterial unit cell. It is described that when the voltage applied between the two conductors is changed, the dielectric constant of the liquid crystal layer changes, and as a result, the directivity of the electromagnetic wave changes.
- An object of the present invention is to provide a structure having a simple wiring structure and capable of easily changing the directivity of leakage waves.
- a first conductor A plurality of second conductors facing the first conductor and arranged repeatedly; A plurality of third conductors facing each of the plurality of second conductors; A dielectric constant variable layer provided between at least one of the plurality of third conductors and the plurality of second conductors and between at least one of the plurality of third conductors and the first conductor; A fourth conductor connecting the first second conductor and the second second conductor located next to the first second conductor; A structure is provided.
- FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. It is a top view which shows the pattern of a 3rd conductor.
- FIG. 3 is an equivalent circuit diagram of the unit cell shown in FIG. 2. It is a figure for demonstrating the effect
- It is sectional drawing which shows the structure of the structure which concerns on 2nd Embodiment.
- It is sectional drawing which shows the structure of the structure which concerns on 3rd Embodiment.
- FIG. 1 ist Embodiment.
- FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.
- It is a top view which shows the pattern of a 3rd conductor.
- FIG. 3 is an equivalent circuit diagram of the unit cell shown in FIG. 2. It is a
- FIG. 10 is a cross-sectional view taken along the line AA ′ of FIG. It is sectional drawing which shows the structure of the structure which concerns on 6th Embodiment. It is a top view which shows the structure of the structure which concerns on 7th Embodiment. It is a top view which shows the structure of the structure which concerns on 8th Embodiment. It is AA 'sectional drawing of FIG. FIG. 15 is an equivalent circuit diagram of a unit cell of the structure shown in FIGS. 13 and 14. It is a top view which shows the structure of the structure which concerns on 9th Embodiment. It is AA 'sectional drawing of FIG. FIG. 18 is an equivalent circuit diagram of a unit cell of the structure shown in FIGS. 16 and 17. It is sectional drawing which shows the structure of the structure which concerns on 10th Embodiment.
- FIG. 1 is a perspective view showing the configuration of the structure according to the first embodiment
- FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.
- FIG. 2 shows power supply conductors 220 and 240 and vias 400 described later.
- the structure includes a first conductor 100, a plurality of second conductors 200, a plurality of third conductors 410, a dielectric constant variable layer (insulating layer 620), and a fourth conductor 300.
- the plurality of second conductors 200 face the first conductor 100 and are repeatedly arranged, for example, periodically.
- the third conductor 410 is provided at a position facing each of the plurality of second conductors 200.
- the dielectric constant variable layer is formed of a dielectric constant variable material whose dielectric constant varies depending on voltage, for example, liquid crystal, and between the plurality of second conductors 200 and the plurality of third conductors 410, and between the plurality of third conductors 410 and the second conductors. It is provided between at least one of the conductors 100.
- the dielectric constant variable layer is the insulating layer 620 and is located between the second conductor 200 and the third conductor 410.
- the fourth conductor 300 is connected to the first second conductor 200 and each of the second second conductors 200 located adjacent thereto via vias 500.
- the fourth conductor 300 forms a transmission line having the second conductor 200 as a return path by facing the second conductor 200. Details will be described below.
- the first conductor 100 is a metal film such as a Cu film, for example, and extends in a sheet shape in the first conductor layer.
- An insulating layer 610 is provided on the first conductor 100.
- a second conductor layer is formed on the insulating layer 610.
- a third conductor 410 is formed on the second conductor layer.
- An insulating layer 620 is formed on the second conductor layer.
- a third conductor layer is formed on the insulating layer 620.
- a second conductor 200 is formed on the third conductor layer.
- An insulating layer 630 is formed on the third conductor layer.
- a fourth conductor layer is formed on the insulating layer 630.
- a fourth conductor 300 is formed on the fourth conductor layer.
- the second conductor 200 is located on the opposite side of the first conductor 100 via the third conductor 410
- the fourth conductor 300 is the third conductor 410 via the second conductor 200.
- the second conductor 200, the third conductor 410, and the fourth conductor 300 are metal films such as a Cu film, for example, and are repeatedly provided, for example, periodically along the first direction (X direction in the drawing). .
- the fourth conductor 300 has one end electrically connected to the first second conductor 200 and the other end connected to the second second conductor 200. For this reason, the fourth conductor 300 forms a microstrip line with the second second conductor 200 as a return path, and functions as a short stub.
- three or more second conductors 200 are provided, and the fourth conductor 300 is provided between at least one pair of adjacent second conductors 200. In the example illustrated in FIGS. 1 and 2, the fourth conductor 300 is provided between all the second conductors 200 adjacent to each other.
- the plurality of second conductors 200 are connected to each other in a direct current manner via the fourth conductor 300 and the via 500.
- the via 500 penetrates the insulating layer 630, one end is connected to the second conductor 200, and the other end is connected to the end of the fourth conductor 300.
- the via 500 is connected to the second conductor 200 at an end portion of the second conductor 200 in the X direction in the drawing, that is, at a place not overlapping with a via 400 described later.
- the third conductor 410 is a wiring-like conductor pattern.
- the third conductor 410 has one end connected to the other end of the via 400 and the other end being an open end.
- the third conductor 410 forms a microstrip line with the second conductor 200 as a return path, and functions as an open stub.
- the third conductor 410 is connected to the first conductor 100 via the via 400 that penetrates the insulating layer 610.
- the number of the fourth conductors 300 is not limited to this.
- the 4th conductor 300 is a conductor pattern extended
- feeding conductors 220 and 240 are formed in the third conductor layer, that is, the same layer as the second conductor 200.
- the power feeding conductor 220 is electrically connected to the second conductor 200 positioned at one end of the second conductor 200 array, and the power feeding conductor 240 is the second conductor positioned at the other end of the second conductor 200 array. It is electrically connected to the conductor 200.
- the power feeding conductors 220 and 240 may be directly connected to the second conductor 200 or may be capacitively coupled. Since the power supply conductors 220 and 240 are opposed to the first conductor 100, the power supply conductor path is configured together with the first conductor 100.
- the structure according to this embodiment functions as an array antenna (leakage wave antenna). However, the feeding conductors 220 and 240 are not necessarily required at both ends of the arrangement of the second conductors 200, and only one of them may be provided.
- the unit cells 10 are repeatedly arranged, for example, periodically.
- the unit cell 10 includes a first conductor 100, a via 400, a third conductor 410, a half of the first second conductor 200, a half of the second second conductor 200, a via 500, and a fourth conductor 300. Yes.
- portions of the structure other than the power supply conductor paths 220 and 240 function as metamaterials.
- 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 10. When the unit cell 10 has a two-dimensional array, “repetition” includes a case where the unit cell 10 is partially missing. Further, “periodic” includes a case where some of the constituent elements are deviated in some unit cells 10 and a case where the arrangement of some unit cells 10 themselves is deviated.
- FIG. 3 is a plan view showing a pattern of the third conductor 410.
- the third conductor 410 extends in a spiral shape.
- the third conductor 410 has an end located at the center of the spiral connected to the via 400. The entire surface of the spiral formed by the third conductor 410 faces the second conductor 200.
- FIG. 4 is an equivalent circuit diagram of the unit cell 10 shown in FIG. Since the first conductor 100 and the second conductor 200 are opposed to each other, a capacitor CR is formed between them.
- a third conductor 410 is located between the first conductor 100 and the second conductor 200. The third conductor 410 forms an open stub together with the second conductor 200. Since the third conductor 410 is connected to the first conductor 100 by a via 400, between the first conductor 100 and the open stub, the inductance L L due to a via 400 is formed.
- the shunt circuit S having the capacitance C R , the inductance L L , and the open stub is configured between the first conductor 100 and the second conductor 200.
- the first second conductors 200a has an inductance L R. Therefore, during the first second conductor 200a and the second second conductor 200b, the series circuit D with a capacity C L and the inductance L R is formed.
- the leaky wave antenna of the present embodiment is preferably designed so as to satisfy a so-called “balance condition” in which the resonance frequencies of the shunt circuit S and the series circuit D are matched. This is because it is usually difficult to achieve impedance matching near the resonance frequency because the antenna's input impedance changes abruptly.
- the resonance frequency of the shunt circuit S can be controlled by the stub length of the open stub, and the resonance frequency of the series circuit D can be controlled by the stub length of the short stub. And easy. However, even if the balance condition is not satisfied, the essential effect of the present invention is not affected at all.
- FIG. 5 is a diagram showing the radiation direction of leakage waves when power is input from the power supply conductor 220 in the structure shown in FIGS.
- the structure according to the present embodiment is known to cause zero-order resonance in which the wavelength of the electromagnetic wave in the structure becomes infinite at the resonance frequency of the shunt circuit S or the resonance frequency of the series circuit D.
- the leaky wave is refracted and radiated in a direction perpendicular to the structure.
- the structure according to the present embodiment operates as a left-handed metamaterial on the lower frequency side than the zeroth-order resonance frequency, and has a negative refractive index. For this reason, the leaky wave is refracted and radiated backward with respect to the traveling direction of power.
- the structure according to the present embodiment operates as a right-handed metamaterial at a frequency higher than the zeroth-order resonance frequency, and has a positive refractive index. Therefore, the leakage wave is refracted forward with respect to the traveling direction of power. Is emitted.
- the insulating layer 620 is a capacitance variable layer, and has a dielectric constant depending on a potential difference between the potential of the third conductor 410 and the second conductor 200, that is, a voltage applied between the first conductor 100 and the second conductor 200. Changes. Therefore, by changing the voltage applied between the first conductor 100 and the second conductor 200, the dielectric constant of the layer (insulating layer 620) between the third conductor 410 and the second conductor 200, that is, between the open stubs. As a result, the propagation constant of the transmission line formed by the third conductor 410 can be changed. Thereby, the zero-order resonance frequency of the structure can be changed within a certain frequency region. And when the frequency input into an antenna is located in the variable range of the 0th-order resonance frequency of a structure, the radiation direction of a leaky wave can be changed.
- the zeroth-order resonance frequency can be positioned on either the high frequency side or the low frequency side of the frequency input to the antenna. It is also possible to match the frequency input to the antenna.
- the zeroth-order resonance frequency is positioned higher than the frequency input to the antenna, the leaky wave is refracted and radiated backward with respect to the traveling direction of power.
- the zero-order resonance frequency is positioned on the lower frequency side than the frequency input to the antenna, the leaky wave is refracted forward and radiated in the traveling direction of power.
- the zeroth-order resonance frequency is made to coincide with the frequency input to the antenna, the leaky wave is refracted and radiated in a direction perpendicular to the traveling direction of power.
- the plurality of second conductors 200 are connected to each other via the fourth conductor 300 and the via 500 in terms of direct current. For this reason, as shown in FIG. 5, all the second conductors 200 are connected by connecting a DC variable voltage source 710 between any of the second conductors 200 and the first conductors 100 via, for example, a switch 720. On the other hand, the same voltage based on the first conductor 100 can be applied. Therefore, the wiring structure is simplified.
- FIG. 6 is a cross-sectional view showing the structure of the structure according to the second embodiment, and corresponds to FIG. 2 in the first embodiment.
- the structure according to the present embodiment has the same configuration as the structure according to the first embodiment except for the following points.
- the layers in which the third conductor 410 and the fourth conductor 300 are formed are interchanged. That is, the third conductor 410 is formed on the insulating layer 630, and the fourth conductor 300 is formed on the insulating layer 610. That is, in the present embodiment, the second conductor 200 is located on the opposite side of the first conductor 100 with the fourth conductor 300 interposed therebetween, and the third conductor 410 has the fourth conductor 300 interposed with the second conductor 200 interposed therebetween. It is located on the opposite side.
- the via 500 is provided in the insulating layer 620.
- the second conductor 200 has an opening 202, and the via 400 passes through the insulating layers 610, 620, and 630 through the opening 202. Therefore, the via 400 can be connected to the third conductor 410 without being electrically connected to the second conductor 200.
- the insulating layer 630 is not the insulating layer 620 but is a variable dielectric constant layer. That is, the insulating layer 630 is formed of a material whose dielectric constant changes with voltage, such as liquid crystal.
- FIG. 7 is a cross-sectional view showing the structure of the structure according to the third embodiment, and corresponds to FIG. 2 in the first embodiment.
- the structure according to the present embodiment has the same configuration as the structure according to the first embodiment except for the following points.
- the fourth conductor 300 is formed on the same layer as the third conductor 410, that is, on the insulating layer 610.
- the via 500 is formed in the insulating layer 620.
- the insulating layer 630 is not formed.
- the same effect as that of the first embodiment can be obtained. Further, since there is no need to provide the insulating layer 630, the number of layers can be reduced. Further, since the layer between the fourth conductor 300 and the second conductor 200 is also a variable dielectric constant layer, the propagation constant of the short stub in the series circuit D can be changed. As a result, it is possible to change the zero-order resonance frequency while satisfying the balance condition, that is, while maintaining impedance matching.
- FIG. 8 is a cross-sectional view showing the structure of the structure according to the fourth embodiment, and corresponds to FIG. 7 in the third embodiment.
- the layer in which the second conductor 200 and the power feeding conductors 220 and 240 are formed and the layer in which the third conductor 410 and the fourth conductor 300 are formed are interchanged. Except for this, the structure is the same as that of the structure according to the third embodiment.
- the second conductor 200 and the power feeding conductors 220 and 240 are formed on the insulating layer 610.
- the third conductor 410 and the fourth conductor 300 are formed on the insulating layer 620.
- the insulating layer 630 is not formed.
- the second conductor 200 has an opening 202, and the via 400 passes through the insulating layers 610 and 620 through the opening 202. Therefore, the via 400 can be connected to the third conductor 410 without being electrically connected to the second conductor 200.
- FIG. 9 is a plan view showing a configuration of a structure according to the fifth embodiment.
- 10 is a cross-sectional view taken along the line AA ′ of FIG.
- the structure according to the present embodiment has the same configuration as the structure according to the first embodiment except for the following points.
- the fourth conductor 300 is formed on the same layer as the second conductor 200, that is, on the insulating layer 620. Also, the via 500 and the insulating layer 630 are not formed.
- the plurality of second conductors 200 have recesses 204 except for the second conductor 200 connected to the power feeding conductor 220.
- the second conductor 200 has a rectangular shape, and the recess 204 is formed on the side of the second conductor 200 that is closer to the power feeding conductor 220.
- the fourth conductor 300 is formed integrally with the second conductor 200, and the bottom side of the recess 204 of the second conductor 200 located next to the side of the second conductor 200 far from the power feeding conductor 220. Connected to. That is, the fourth conductor 300 forms a coplanar line with the side of the recess 204 as a return path, and functions as a short stub.
- the second conductor 200 of FIG. 9 includes a recess on one side facing the adjacent second conductor 200 and a fourth conductor 300 on the other side, but a pair of adjacent second conductors 200.
- a concave portion is provided on one side of the sides facing each other and the fourth conductor 300 is provided on the other side and a coplanar line is formed, it is not necessary to limit to the configuration of FIG.
- the position where the recess 204 and the fourth conductor 300 are formed may be switched with respect to the example shown in FIG. 9, the second conductor 200 provided with a recess on both sides, or the fourth conductor 300 provided on both sides.
- the same effect as that of the first embodiment can also be obtained by this embodiment. Further, since the fourth conductor 300 is formed in the same layer as the second conductor 200, it is not necessary to form the via 500 and the insulating layer 630, and the number of layers required for the structure can be reduced. Therefore, the manufacturing cost of the structure can be further reduced.
- FIG. 11 is a cross-sectional view showing the structure of the structure according to the sixth embodiment, which corresponds to FIG. 10 in the fifth embodiment.
- the layer in which the second conductor 200 and the fourth conductor 300 (not shown in the drawing) are formed and the layer in which the third conductor 410 is formed are interchanged.
- the structure is the same as that of the structure according to the fifth embodiment.
- the second conductor 200 and the fourth conductor 300 are formed on the insulating layer 610, and the third conductor 410 is formed on the insulating layer 620.
- the second conductor 200 has an opening 202, and the via 400 passes through the insulating layers 610 and 620 through the opening 202. Therefore, the via 400 can be connected to the third conductor 410 without being electrically connected to the second conductor 200.
- FIG. 12 is a plan view showing the structure of the structure according to the seventh embodiment.
- the structure according to the present embodiment has the same configuration as the structure according to the fifth embodiment except for the following points.
- the second conductor 200 does not have the recess 204.
- the second conductors 200 are arranged in the X direction in the figure.
- the fourth conductor 300 extends from the side of the first second conductor 200 facing the second second conductor in a direction intersecting with the X direction in the drawing.
- the second conductor 200 has a rectangular shape.
- the fourth conductor 300 is formed integrally with the second conductor 200 on the side of the second conductor 200 farther from the power feeding conductor 220.
- the fourth conductor 300 extends in a direction substantially parallel to the above-described side of the second conductor 200, that is, a direction orthogonal to the X direction.
- the second conductor 200 has a fifth conductor 310 on the side close to the power feeding conductor 220.
- the fifth conductor 310 extends to face the fourth conductor 300 of the second conductor 200 located adjacent to the fifth conductor 310, and the fourth conductor 300 and the fifth conductor 310 form a balanced transmission line.
- the fourth conductor 300 and the fifth conductor 310 are preferably parallel to each other and have the same length.
- the ends of the fourth conductor 300 and the fifth conductor 310 are connected to each other, and the balanced transmission line formed by these functions as a short stub.
- FIG. 13 is a plan view showing a configuration of a structure according to the eighth embodiment.
- 14 is a cross-sectional view taken along the line AA ′ of FIG.
- the structure according to the present embodiment has the same configuration as the structure according to the fifth embodiment except for the following points.
- the second conductor 200 is provided with an opening 206.
- a third conductor 410 is formed in the opening 206. That is, the third conductor 410 is formed in the same layer as the second conductor 200 and the fourth conductor 300 and faces the first conductor 100.
- One end of the third conductor 410 is connected to the second conductor 200 at the edge of the opening 206, and the other end is an open end. That is, the third conductor 410 forms a microstrip line with the first conductor 100 as a return path, and functions as an open stub.
- the insulating layer 610 is a dielectric constant variable layer.
- the via 400 and the insulating layer 620 are not provided.
- FIG. 15 is an equivalent circuit diagram of the unit cell 10 of the structure shown in FIGS. 13 and 14.
- the equivalent circuit shown in this figure is equivalent to the unit cell 10 shown in FIG. 4 except that there is no inductance L L derived from the via 400, that is, the unit cell 10 and the fifth implementation according to the first embodiment. This is the same as the equivalent circuit of the unit cell 10 according to the embodiment.
- the same effect as that of the first embodiment can be obtained.
- the structure body can be formed using two wiring layers and one insulating layer 610, the manufacturing cost of the structure body can be reduced.
- the layer between the second conductor 200 and the first conductor 100 is also a dielectric constant variable layer, the propagation constant of the short stub in the series circuit D can be changed. As a result, it is possible to change the zero-order resonance frequency while satisfying the balance condition, that is, while maintaining impedance matching.
- FIG. 16 is a plan view showing a configuration of a structure according to the ninth embodiment. 17 is a cross-sectional view taken along the line AA ′ of FIG.
- the structure according to the present embodiment has the same configuration as the structure according to the first embodiment except for the following points.
- the second conductor 200 and the power feeding conductors 220 and 240 are formed on the insulating layer 610.
- the third conductor 210 is provided instead of the third conductor 410, and the inductance element 212 is provided instead of the via 400.
- the third conductor 210 and the inductance element 212 are formed on the same layer as the second conductor 200, that is, on the first conductor 610.
- the third conductor 210 is arranged side by side with the second conductor 200 in the Y direction in the drawing, that is, in a direction perpendicular to the arrangement direction of the second conductors 200. In the example shown in the drawing, the third conductor 210 is disposed on both sides of the second conductor 200.
- the inductance element 212 is a wiring-like conductor pattern, and connects the second conductor 200 and the third conductor 210.
- the fourth conductor 300 is formed on the insulating layer 620, and the via 500 is formed in the insulating layer 620.
- the insulating layer 610 instead of the insulating layer 620 is a dielectric constant variable layer.
- the insulating layer 630 is not formed.
- FIG. 18 is an equivalent circuit diagram of the unit cell 10 of the structure shown in FIGS. As shown in the figure, the unit cell 10 in the present embodiment, except that the shunt circuit S has a capacitance C G instead of the short stubs are the same as the equivalent circuit shown in FIG.
- the capacitance CG is a capacitance formed between the first conductor 100 and the third conductor 210, and is located between the inductance L L caused by the inductance element 212 and the first conductor 100 in the equivalent circuit. .
- the dielectric layer of the capacitor C G formed with the third conductor 210 by a first conductor 100 (insulating layer 610) the dielectric constant can be changed the dielectric constant of the dielectric layer (insulating layer 610) of the capacitance C R which is formed by the first conductor 100 and second conductor 200.
- the propagation constant of the shunt circuit S can be changed. Therefore, the same effect as the first embodiment can be obtained.
- FIG. 19 is a cross-sectional view showing the structure of the structure according to the tenth embodiment, and corresponds to FIG. 2 in the first embodiment.
- the structure according to the present embodiment has the same configuration as the structure according to the first embodiment except for the following points.
- the via 400 connects the third conductor 410 to the second conductor 200 instead of the first conductor 100. For this reason, the return path of the third conductor 410 is not the second conductor 200 but the first conductor 100.
- the insulating layer 610, not the insulating layer 620, is formed of a dielectric constant variable material.
- the insulating layer 610 may be a variable dielectric constant layer.
- the insulating layer 620 may be a dielectric constant variable layer.
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Abstract
Description
前記第1導体に対向し、繰り返し配置されている複数の第2導体と、
前記複数の第2導体それぞれに対向している複数の第3導体と、
前記複数の第3導体と前記複数の第2導体の間と、前記複数の第3導体と前記第1導体の間の少なくとも一方に設けられ、電圧によって誘電率が変わる誘電率可変層と、
第1の前記第2導体と、当該第1の第2導体の隣に位置する第2の前記第2導体とを互いに接続する第4導体と、
を備える構造体が提供される。
Claims (18)
- 第1導体と、
前記第1導体に対向し、繰り返し配置されている複数の第2導体と、
前記複数の第2導体それぞれに対向している複数の第3導体と、前記複数の第3導体と前記複数の第2導体の間と、前記複数の第3導体と前記第1導体の間と、の少なくとも一方に設けられ、電圧によって誘電率が変わる誘電率可変層と、
第1の前記第2導体と、当該第1の第2導体の隣に位置する第2の前記第2導体とを互いに接続する第4導体と、
を備える構造体。 - 請求項1に記載の構造体において、
前記第4導体は、前記第2の第2導体をリターンパスとする伝送線路を形成する構造体。 - 請求項2に記載の構造体において、
前記伝送線路はマイクロストリップラインである構造体。 - 請求項2に記載の構造体において、
前記伝送線路はコプレナー線路である構造体。 - 請求項2に記載の構造体において、
前記伝送線路は平衡型伝送線路である構造体。 - 請求項1~5のいずれか一項に記載の構造体において、
前記第2導体および前記第3導体は3つ以上設けられており、
前記第4導体は、全ての互いに隣り合う前記第2導体の間に設けられている構造体。 - 請求項1~6のいずれか一項に記載の構造体において、
前記誘電率可変層は、少なくとも前記複数の第3導体と前記複数の第2導体の間に設けられており、
前記第3導体は、前記第2導体をリターンパスとする伝送線路を形成している構造体。 - 請求項7に記載の構造体において、
前記複数の第3導体それぞれに少なくとも一つずつ設けられ、前記第1導体と前記第3導体とを接続するインダクタンス要素をさらに備える構造体。 - 請求項1~6のいずれか一項に記載の構造体において、
前記誘電率可変層は、少なくとも前記複数の第3導体と前記第1導体の間に設けられており、
前記第3導体は、前記第1導体をリターンパスとする伝送線路を形成している構造体。 - 請求項9に記載の構造体において、
前記複数の第3導体それぞれに少なくとも一つずつ設けられ、前記第2導体と前記第3導体とを接続するインダクタンス要素をさらに備える構造体。 - 請求項1~10のいずれか一項に記載の構造体において、
前記第2導体は、前記第3導体を介して前記第1導体とは反対側に位置しており、
前記第4導体は、前記第2導体を介して前記第3導体とは反対側に位置している構造体。 - 請求項1~10のいずれか一項に記載の構造体において、
前記第2導体は、前記第4導体を介して前記第1導体とは反対側に位置しており、
前記第3導体は、前記第2導体を介して前記第4導体とは反対側に位置している構造体。 - 請求項1~10のいずれか一項に記載の構造体において、
前記第4導体は、前記第3導体と同一層に形成されている構造体。 - 請求項1~10のいずれか一項に記載の構造体において、
前記第4導体は前記第2導体と同一層に形成されており、
前記第2の第2導体は、前記第1の第2導体に対向する辺に凹部を有しており、
前記第4導体は、前記第1の第2導体から前記凹部の内側までに延伸している構造体。 - 請求項14に記載の構造体において、
前記第1の第2導体と前記第2の第2導体は、第1の方向に並んでおり、
前記第4導体は、前記第1の第2導体のうち前記第2の第2導体に対向する辺から、前記第1の方向と交わる方向に延伸している構造体。 - 請求項1~10のいずれか一項に記載の構造体において、
前記第3導体は前記第2導体と同一層に形成されている構造体。 - 請求項1に記載の構造体において、前記第3導体は、前記第1導体との間に容量を形成する構造体。
- 請求項1~17のいずれか一項に記載の構造体において、
前記構造体はアンテナの少なくとも一部であり、
前記第1導体及び端部に位置する前記第3導体に接続する給電用導体路をさらに備える構造体。
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US8922455B2 (en) | 2014-12-30 |
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