WO2013168377A1

WO2013168377A1 - Waveguide structure having ebg characteristic

Info

Publication number: WO2013168377A1
Application number: PCT/JP2013/002716
Authority: WO
Inventors: 嘉晃笠原; 博鳥屋尾
Original assignee: 日本電気株式会社
Priority date: 2012-05-10
Filing date: 2013-04-23
Publication date: 2013-11-14
Also published as: JP6176242B2; JPWO2013168377A1

Abstract

Provided is a waveguide structure having an EBG characteristic, mountable in a small area, when viewed in plan. The waveguide structure includes a printed circuit board, a first conductor plane and a second conductor plane provided on the printed circuit board so as to be substantially parallel to each other, and a divided-ring-shaped resonator. The divided-ring-shaped resonator has a ring part and at least a pair of open ends where the ring part is disconnected. The open ends constituting the pair of open ends are disposed close. At least a part of the ring part of the divided-ring-shaped resonator is disposed in an area sandwiched by the first conductor plane and the second conductor plane. The ring part is provided substantially not parallel to the main surfaces of the first conductor plane and the second conductor plane.

Description

Waveguide structure having EBG characteristics

The present invention relates to a waveguide structure, and more particularly to a waveguide structure having an electromagnetic band gap (EBG) characteristic for suppressing electromagnetic noise propagating in a printed circuit board.

In an electronic device having a plurality of conductor planes, for example, a magnetic field is induced by a current flowing into a circuit at the time of switching of a digital circuit, or an electric field is induced by a voltage fluctuation generated at the time of switching, thereby generating an electromagnetic wave. This becomes electromagnetic noise transmitted through the conductor plane. This electromagnetic noise causes problems such as destabilizing the operation of other circuits and degrading the wireless performance of the device. That is, by establishing a technique for suppressing this electromagnetic noise, the stability of the circuit and the wireless performance of the device can be improved.

As background art for such electromagnetic noise countermeasures, there are a method of inserting a decoupling capacitor between conductor planes, a method of avoiding the creation of a large island conductor plane, and the like. However, the background technique has the following problems. In the method using a decoupling capacitor, it is difficult to make the self-resonance frequency as high as several GHz due to the inevitable parasitic inductance of the capacitor. Therefore, the method using the decoupling capacitor is usually applicable only to the frequency band up to about 1 GHz. That is, it cannot cope with a high frequency band such as that used in wireless communication in recent years, for example, the 2.4 GHz band. The technique for avoiding the creation of a large island-shaped conductor plane is based on the principle that an unintended resonance frequency is pressed to the high frequency side by reducing the conductor plane. However, conductor planes with the same potential need to be connected in a DC (direct current) manner. If the connecting portion is made too thin, the self-inductance of the connecting portion increases, and the voltage drop at the time of current inflow during switching cannot be ignored. Therefore, there is a practical limit to reducing the conductor plane.

There is a technique listed in Patent Document 1 as a technique for solving the problems of the background art. The structure described in Patent Document 1 is a structure having an EBG (Electromagnetic Bandgap) characteristic, and is intended to suppress propagation of electromagnetic noise between power planes. 36A is a perspective view showing a structure having an EBG characteristic proposed in Patent Document 1, FIG. 36B is a sectional view of the structure having the EBG characteristic, and FIG. 36B is an equivalent circuit of the structure having the EBG characteristic. FIG. As shown in FIGS. 36A and 36B, conductor patches 203 are periodically arranged in a layer between the

power planes

201 and 202, and each conductor patch 203 is connected to the power plane 201 and the conductor rod 204. Yes. As shown in FIG. 36C, an equivalent circuit of this structure has a configuration in which a parallel plate waveguide composed of two power supply planes is shunted by a series resonance portion composed of a capacitance C of a conductor patch and an inductance L of a conductor rod. In the frequency band in which the impedance of the series circuit portion composed of the capacitance C of the conductor patch and the inductance L of the conductor rod behaves as an inductance, it has an electromagnetic noise suppressing effect.

According to the structure having the EBG characteristic of Patent Document 1, an electromagnetic noise suppressing effect can be provided in the GHz band, and the power supply plane is not crafted like the technique of dividing the conductor plane into small islands. There is no fear of increasing the inductance unlike the technique of separating the conductor planes described as the technology.

Also, there is a technique cited in Patent Document 2 as another form of a structure having another EBG characteristic that solves the problems of the background art. Since the structure described in Patent Document 2 is a modified example of the structure described as the background art in Patent Document 3, the principle is simply described with reference to FIGS. 38A and 38B which are the drawings described in Patent Document 3. To do. As shown in FIG. 38A, the waveguide structure described as the background art in Patent Document 3 is a structure in which conductor planes are divided by slits, and each conductor patch formed by being divided by the slits is connected by a thin connection portion. ing. As shown in FIG. 38B, the equivalent circuit diagram of this structure is shown in FIG. The parallel resonant circuit is added as a series branch. In the waveguide structure described by such an equivalent circuit, a series branch portion (a portion formed by an inductance Lp of a parallel plate waveguide, a capacitance Cg of a slit portion, and an inductance Lb of a connection portion connecting the slit portions) behaves as a capacitance. In the frequency band, the electromagnetic noise suppression effect can be achieved even in a high frequency such as the GHz band, which has been difficult to achieve with the method using the decoupling capacitor described in the background art.

The structure described in Patent Document 2 is a structure in which the connecting portion for connecting the slit portion described as the background art in Patent Document 3 is realized by using a layer different from the conductor plane provided with the slit. A cross-sectional view of the waveguide structure described in Patent Document 2 is shown in FIG. As can be seen from FIG. 37, the

metal plates

304 and 305 are connected using the first via 301, the second via 302, and the connection pattern 303. The first via 301, the second via 302, and the connection pattern 303 correspond to the thin connection portion of the background art of Patent Document 3, and the

metal plates

304 and 305 correspond to the conductor plane divided by the slit of the background technology of Patent Document 3. is doing. In other words, the thin connection portion of the background art of Patent Document 3 is formed using a layer different from the conductor plane (in Patent Document 2, the metal plates 304 and 305) by using vias. For this reason, the equivalent circuit is the same as the structure described in the background art of Patent Document 3, and an electromagnetic noise suppression effect can be expected based on the same principle as the structure described in the background art of Patent Document 3.

US Patent No. 7,215,007 JP 2010-10647 A US2007 / 0090398A1

However, the following problems exist in the structure having the EBG characteristic that is the electromagnetic noise suppression technology of the background art of Patent Document 1, Patent Document 2, and Patent Document 3.

First, the problem of Patent Document 1 will be described. The problem is that the area of the structure for realizing the EBG characteristics in a desired frequency band occupies a large area. For example, in Patent Document 1, in order to realize an electromagnetic band gap starting from 2 GHz, the area of one conductor patch 106 occupies 200 mm × 200 mm in plan view. In order to reduce the occupied area in plan view, it is necessary to reduce the area of the conductor patch. However, if the conductor patch is simply made smaller, the capacitance value between the conductor patch and the conductor plane is reduced, and the frequency band having the EBG characteristic is increased in frequency, so that the desired frequency band is deviated. In order to avoid this high frequency, the decrease in capacitance must be compensated by increasing the inductance of the conductor rod. In order to increase the inductance of the conductor rod, a prescription such as reducing the diameter of the rod or increasing the length of the rod is necessary. However, the former has a limit due to manufacturable conditions, and the latter is not practically desirable because the layer spacing of the substrate is limited by the structure having EBG characteristics. That is, it is possible in principle to reduce the area in plan view, but in that case, a new problem arises. *

The problem of the background art of Patent Document 2 and Patent Document 3 is that the conductor plane divided by the slit is connected by a thin connection portion, so that the inductance value of the corresponding portion becomes large and causes a voltage drop. The waveguide structure having the EBG characteristic described in the background art of Patent Document 2 and Patent Document 3 is assumed to be used for a power plane as understood from the fact that the divided conductor patches are connected in a DC manner. . However, in the structures described in the background arts of Patent Document 2 and Patent Document 3, there are many places that are connected only by thin connection portions in a conductor plane that is assumed as a power plane. In this case, a large voltage drop occurs when a current flows through the corresponding portion, and it is difficult to use it as a power plane in practical use.

Therefore, the present invention takes into consideration the above-mentioned problems and does not cause a voltage drop. Therefore, the present invention provides a waveguide structure having an EBG characteristic that can be mounted in a small area when viewed in a plan view without a large work on the conductor plane. The purpose is to provide.

To achieve the above object, a waveguide structure having EBG characteristics according to the present invention includes a substrate, first and second conductor planes provided on the substrate so as to be substantially parallel to each other, and a split ring. The split ring resonator has an annular portion and at least one pair of open end pairs in which the annular portion is interrupted, and constitutes the one set of open end pairs. At least a part of the annular portion of the split ring resonator in a region sandwiched between the first and second conductor planes. The annular portion is provided in a direction that is not substantially parallel to the main surface of the second conductor plane.

The present invention can provide a waveguide structure having EBG characteristics that can be mounted in a small area.

It is a top view for demonstrating the waveguide structure which has EBG characteristic of 1st Embodiment of this invention. It is sectional drawing along the II line | wire of FIG. It is sectional drawing along the II line of FIG. 1 for demonstrating another example of the waveguide structure of 1st Embodiment of this invention. It is sectional drawing along the II line of FIG. 1 for demonstrating another example of the waveguide structure of 1st Embodiment of this invention. It is a top view of the printed circuit board with which the division | segmentation ring-shaped resonator was arranged in multiple numbers. It is an equivalent circuit diagram of the waveguide structure of the embodiment of the present invention. It is an equivalent circuit diagram of the waveguide structure of the embodiment of the present invention. It is a circuit diagram which shows a one-dimensional transmission line model. It is a graph for demonstrating the effect of the waveguide structure of 1st Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 2nd Embodiment of this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the II-II line of FIG. 10 for demonstrating another example of the waveguide structure of 2nd Embodiment of this invention. It is sectional drawing for demonstrating the waveguide structure of 3rd Embodiment of this invention. It is sectional drawing for demonstrating another example of the waveguide structure of 3rd Embodiment of this invention. It is sectional drawing for demonstrating another example of the waveguide structure of 3rd Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 4th Embodiment of this invention. It is a top view for demonstrating another example of the waveguide structure of 4th Embodiment of this invention. It is sectional drawing along the III-III line of FIG. It is sectional drawing along the IV-IV line of FIG. It is sectional drawing for demonstrating another example of the waveguide structure of 4th Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 5th Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 6th Embodiment of this invention. It is a top view for demonstrating another example of the waveguide structure of 6th Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 7th Embodiment of this invention. FIG. 25 is a sectional view taken along line VV in FIG. 24. It is sectional drawing along the VI-VI line of FIG. It is a graph for demonstrating the effect of the waveguide structure of 7th Embodiment of this invention. It is a top view for demonstrating the waveguide structure of 8th Embodiment of this invention. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing along the VIII-VIII line of FIG. It is a top view for demonstrating the other example of the waveguide structure of 8th Embodiment of this invention. FIG. 32 is a cross-sectional view taken along line IX-IX in FIG. 31. FIG. 32 is a cross-sectional view taken along line XX in FIG. 31. It is a top view for demonstrating the other example of the waveguide structure of embodiment of this invention. It is a top view for demonstrating the other example of the waveguide structure of embodiment of this invention. It is sectional drawing of the waveguide structure for demonstrating another example of the waveguide structure of 2nd Embodiment of this invention. It is a perspective view for demonstrating the structure which has the EBG characteristic proposed by patent document 1. FIG. FIG. 36B is a cross-sectional view of the structure having the EBG characteristic of FIG. 36A. FIG. 36B is an equivalent circuit diagram of the structure having the EBG characteristic of FIG. 36A. It is sectional drawing of the structure which has the EBG characteristic proposed by patent document 2. FIG. FIG. 11 is a plan view of a structure having EBG characteristics described in the background art of Patent Document 3. FIG. 38B is an equivalent circuit diagram of the structure having the EBG characteristic of FIG. 38A.

Before describing the preferred embodiment of the present invention in detail, the concept of the present invention will be described.

The electromagnetic wave noise to be a problem is an electromagnetic wave propagating between parallel plate conductor planes. In the present invention, a split ring resonator is arranged in a parallel plate waveguide composed of a plurality of conductor planes so that the magnetic field component of the electromagnetic wave propagating in the parallel plate waveguide penetrates the ring. . The split ring resonator has an annular portion and at least one open end pair in which the annular portion is interrupted, and each open end constituting the open end pair is adjacent to form a capacitance. Yes. That is, the split ring-shaped resonator constitutes an LC resonator by having at least one open end pair of the annular portion behave as capacitance and the other annular portion behave as inductance. When described by an equivalent circuit model, the parallel plate waveguide is described by an inductance which is a series impedance part and a capacitance which is a parallel admittance part. A structure in which a split ring-shaped LC resonator is coupled to the parallel plate waveguide by a magnetic field is an equivalent circuit of the present invention. This equivalent circuit model can be expressed more simply as an equivalent circuit model in which a parallel LC resonator is added as a series impedance to the equivalent circuit model of the parallel plate waveguide. At this time, the coupling between the parallel plate line and the split ring LC resonator due to the magnetic field is pushed into the values of the inductance L and the capacitance C of the simplified parallel LC resonator. The amplitude of the electromagnetic wave propagating in such an equivalent circuit attenuates as it progresses in a frequency band in which the series impedance portion is capacitive. That is, it has an EBG characteristic in such a frequency band. Thereby, the electromagnetic wave which propagates between the parallel plate conductor planes as a problem can be suppressed by arranging the split ring resonator. As a result, the present invention can provide a waveguide structure having EBG characteristics.

In the mushroom type EBG structure described in Patent Document 1, the area of the conductor patch directly affects the capacitance value because the mushroom type structure must form a capacitance with the conductor plane. Here, in order to increase the inductance of the conductor rod, prescriptions such as reducing the diameter of the rod and increasing the length of the rod are necessary, and considering that these are difficult in practice, the inductance value is It is difficult to use as a design parameter, and the size of the conductor patch and the frequency band with the EBG characteristic correspond one-to-one (however, the distance between the conductor patch and the conductor plane and the relative dielectric constant of the material are fixed). if you did this). That is, when the frequency band having the EBG characteristic is determined, the size of the conductor patch, that is, the area occupied in plan view is determined. On the other hand, in the present invention, each open end constituting one open end pair of the split ring resonator is close to form a capacitance. Unlike the structure described in Patent Document 1, a capacitance is not formed between the conductor plane and the capacitance forming method has a great degree of freedom, and the capacitance value is not necessarily divided in a plan view. There is no one-to-one correspondence with the area occupied by the resonators. In addition, in the annular portion constituting the split ring resonator, the entire annular portion behaves as an inductance. In the structure described in Patent Document 1, only the rod portion behaves as an inductance. However, in the present invention, since the entire annular portion behaves as an inductance, it is possible to easily obtain a large inductance value. For the above reasons, according to the present invention, a waveguide structure having EBG characteristics in a desired frequency band can be realized in a region having a smaller area in plan view than the structure described in Patent Document 1.

Further, in the EBG structure described in Patent Document 2, since the conductor plane divided by the slit is connected by a thin connection portion, the inductance value of the corresponding portion becomes large, and when the conductor plane is used as a power plane, A large voltage drop occurs at the relevant location. On the other hand, in the waveguide structure having the EBG characteristic of the present invention, such a voltage drop does not occur because the conductor plane is not processed to have a thin connection portion. That is, it is possible to provide a structure having EBG characteristics in which a large voltage drop does not occur even when a conductor plane is used as a power supply plane.

It is also possible to provide clearance holes, openings, slits, cutouts, etc. in the conductor plane, and to arrange split ring resonators using such clearance holes, slits, cutouts, etc. By using these configurations together, a waveguide structure having EBG characteristics that can be mounted without being affected by the layer configuration can be provided. Hereinafter, clearance holes, openings, slits, cutouts, and the like will be collectively referred to as clearance holes.

[First Embodiment]
First, a waveguide structure having EBG characteristics according to the first embodiment of the present invention will be described. FIG. 1 is a plan view showing a waveguide structure according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along line II in FIG. FIG. 3 is a cross-sectional view taken along the line II in FIG. 1, showing another example of the waveguide structure according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line II of FIG. 1, showing still another example of the waveguide structure according to the first embodiment of the present invention. FIG. 5 is a plan view of a printed circuit board in which a plurality of the split ring resonators of FIG. 1 are arranged.

1 to 4 show the periphery of a region where one of the split ring resonators is arranged, and FIG. 5 shows a state in which a plurality of the split ring resonators are arranged on a printed circuit board. Yes. As shown in FIGS. 2 to 4, the x, y, and z axes will be defined and described.

The waveguide structure having the EBG characteristic according to the present embodiment includes the first conductor plane 102 and the second conductor provided on the surface layer or the inner layer of the printed circuit board 101 so as to be substantially parallel to the printed circuit board 101. A plane 103 and a split ring-shaped resonator 110 provided on the printed circuit board 101 are provided. In FIG. 2, the split ring-shaped resonator 110 is configured in a range surrounded by a rectangular dotted line. When the region sandwiched between the first conductor plane 102 and the second conductor plane 103 is the first region 104, the split ring resonator 110 of the present embodiment is an annular portion of the split ring resonator. Are arranged so as to be included in the first region 104. Hereinafter, the first region 104 is not only the region sandwiched between the first conductor plane 102 and the second conductor plane 103 facing each other, but also the first conductor plane 102 and the second conductor plane 103. It also includes the existing in-plane region. In the cross-sectional view of FIG. 2, the split ring resonator is rectangular.

In more detail, the split ring resonator includes a first conductor via 105 and a second conductor via 106 provided at different positions in plan view, and a first conductor via 105 and a second conductor via 106. One end is connected to the first conductor via 105 and the other end extends to the second conductor via 106 provided above or below the first connection portion 107 and the first connection portion 107. The second connection portion 108 a and the second connection portion 108 b having one end connected to the second conductor via 106 and the other end extending to the first conductor via 105.

In addition, as shown in FIG. 2, when the through via is used as the conductor via, the first conductor via 105 and the second conductor via 106 are electrically connected to the first conductor plane 102 and the second conductor plane 103. A plurality of clearance holes are formed in the first conductor plane 102 and the second conductor plane 103 so as to pass without being connected. The planar shape of the clearance hole may be a quadrangular shape as shown in FIG. 1, a circular shape or an elliptical shape. A gap 109 is formed between the other ends of the second connecting portion 108a and the second connecting portion 108b, and the other ends are capacitively connected. The first connection portion 107, the second connection portion 108a, and the second connection portion 108b are configured by a surface layer or inner layer wiring of the printed circuit board 101, or a conductor via and a surface layer or inner layer wiring that connect wirings between different layers. It is thought that it is done.

FIG. 2 shows a case where the first connecting portion 107, the second connecting portion 108a, and the second connecting portion 108b are configured by wiring on the inner layer of the printed circuit board 101. In FIG. 2, as described above, the split ring-shaped resonator 110 provided on the printed circuit board 101 is surrounded by the rectangular dotted lines in FIG. 2, that is, the first conductor via 105, the second conductor via 105, and the second conductor via 105. The conductor via 106, the first connecting portion 107, the second connecting portion 108a, and the second connecting portion 108b are configured.

FIG. 3 shows a case where the split ring resonator 110 is configured by the first conductor via 105 and the second conductor via 106, the conductor via connecting the above-described wiring between different layers, and the wiring on the surface layer or the inner layer. Show. In a region outside the first region 104, a first connecting portion 107a having one end connected to the first conductor via 105, and a first connecting portion 107b having one end connected to the second conductor via 106, Is formed. The first connection portion 107a and the first connection portion 107b are arranged in different layers, and the other end portions overlap each other in a plan view in a region outside the first region 104, so that a gap portion is formed. 109 is formed. Further, a second connection portion 108 a having one end connected to the first conductor via 105 is disposed in the first region 104. In a region outside the first region 104, a second connection portion 108b having one end connected to the second conductor via 106 is disposed. In the region outside the first region 104, the other end of the second connection portion 108b is capacitively coupled to one end of the second connection portion 108c arranged in the same layer via the gap portion 109. The second connection portion 108 c and the second connection portion 108 a are connected by a conductor via that passes through a clearance hole provided in the second conductor plane 103.

In FIG. 3, as described above, the split ring-shaped resonator 110 provided on the printed circuit board 101 is surrounded by the square dotted lines in FIG. 3, that is, the first conductor via 105, the second conductor via 105, and the second conductor via 105. Conductor via 106, first connecting

portions

107a and 107b, second connecting portion 108a, second connecting portion 108b, second connecting portion 108c, second connecting portion 108a and second connecting portion 108c. It includes a conductor via to be connected. In FIG. 2, the split ring-shaped resonator is rectangular, but any other polygonal shape does not affect the essential effect of the present invention. For example, an octagonal shape as shown in FIG. 3 may be used, or a completely different shape may be used.

FIG. 4 is a modified example of FIG. 2, and shows a case where the second connection portion 108a and the second connection portion 108b are arranged in different layers. That is, the printed circuit board 101 is provided with a first connection portion 107 that connects the first conductor via 105 and the second conductor via 106 in the first region 104. Further, in the first region 104, a second connection part 108a having one end connected to the first conductor via 105 and a second connection part 108b having one end connected to the second conductor via 106 are provided. Is formed. The second connection portion 108a and the second connection portion 108b are arranged in different layers, and the other end portions thereof are overlapped with each other in plan view to form a gap portion 109.

The split ring-shaped resonator 110 includes a first conductor via 105 and a second conductor via 106, and further electrically connects the first conductor via 105 and the second conductor via 106. Or a plurality of connecting portions that are capacitively connected through the gap 109 to form a split ring resonator. The gap portion 109 may be formed by providing a slit so as to divide the wiring, or between the first connection portion 107a and the first connection portion 107b in FIG. 3 or the second connection in FIG. It may be created by having a portion where wirings arranged in different layers overlap each other in plan view, such as between the portion 108a and the second connection portion 108b.

The waveguide structure having EBG characteristics shown in FIGS. 2 and 3 is configured by arranging one or a plurality of split ring resonators one-dimensionally or two-dimensionally. A case where a plurality of split ring resonators of the present embodiment are two-dimensionally arranged will be described with reference to FIG. The waveguide structure of the present embodiment is assumed to be used for suppressing electromagnetic wave noise propagating between power planes. That is, it is assumed that the printed circuit board 101 includes an electronic device 111 such as an integrated circuit (IC) or a large-scale integrated circuit (LSI) that becomes a noise source. FIG. 5 shows a plurality of two-dimensionally arranged split ring resonators having a waveguide structure having EBG characteristics as shown in FIGS. The split ring resonators disposed at this time do not have to have the same shape. That is, even if split ring resonators having various shapes are mixed and arranged, the essential effect of the present invention is not affected.

FIG. 6 shows an equivalent circuit diagram of the waveguide structure of the present embodiment. In the waveguide structure of the present embodiment, the first conductor plane 102 and the second conductor plane 103 provided on the printed circuit board 101 form a parallel plate waveguide. Further, the capacitively connected gap portion 109 existing in the split ring resonator acts as a capacitance, and other components of the split ring resonator act as an inductance, thereby functioning as an LC resonance circuit. . The LC resonant circuit is coupled to the parallel plate flat plate waveguide via a magnetic field, which is an equivalent circuit diagram of this embodiment. That is, the equivalent circuit diagram of this embodiment is described as shown in FIG. When the equivalent circuit diagram of FIG. 6 is rewritten in consideration of the effect of coupling by a magnetic field, that is, the mutual inductance M of the parallel plate line and the split ring resonator, the equivalent circuit diagram of FIG. 6 becomes a simpler equivalent circuit as shown in FIG. Can be expressed as That is, the L ′ _SRR and the C ′ _SRR in FIG. 7 represent amounts different from the C _SRR from the L _SRR in FIG. 6.

Further, the propagation of the electric field component of the electromagnetic wave of the one-dimensional transmission line model described by the equivalent circuit of FIG. 8 is expressed by the following equation (1) except for the time-dependent factor with the traveling direction of the electromagnetic wave as the x-axis direction. .

[Equation 1]

here,
E: Electric field component of electromagnetic wave of one-dimensional transmission line E ₀ : Amplitude of electric field component of electromagnetic wave of one-dimensional transmission line γ: Propagation constant in one-dimensional transmission line. By comparing the equivalent circuit diagrams of FIG. 7 and FIG. 8, the following relational expression is derived.

[Equation 2]

here,
j: imaginary unit ω: angular frequency Z _TL : series impedance of one-dimensional transmission line Y _TL : parallel admittance L _PPW of one-dimensional transmission line: inductance of parallel plate waveguide C _PPW : capacitance of parallel plate waveguide L _SRR : division Inductance C _{SRR of} ring-shaped resonator: Capacitance L ′ _SRR of divided ring-shaped resonator: Effective inductance C ′ _SRR generated from the divided ring-shaped resonator when the equivalent circuit diagram of FIG. : Effective capacitance generated from the split ring resonator when the equivalent circuit diagram of FIG.
L ′ _SRR , C ′ _SRR , L _SRR , and C _SRR are represented by the following relational expressions.

[Equation 3]

here,
M: A mutual inductance between the inductance of the parallel plate line and the inductance of the split ring resonator.

From Equations (1) to (4), Equation (1) becomes an electromagnetic wave that attenuates as it propagates in the positive direction of the x-axis in the frequency band where Equation (3) has capacitance (Im [Z] <0). It can be seen that the waveguide structure of the embodiment has EBG characteristics. From this, it can be seen that the present invention can provide a waveguide structure having an EBG characteristic in which electromagnetic wave noise does not propagate in a frequency band in which Equation (3) becomes capacitive.

FIG. 9 shows a graph comparing the propagation characteristics of the waveguide structure of the present embodiment and a normal parallel plate waveguide analyzed by electromagnetic field analysis. As can be seen from the graph, in the waveguide structure of the present invention, the propagation amount is attenuated in the specific frequency band (corresponding to the frequency band in which Equation (3) behaves as capacitance: the shaded portion in the figure). In FIG. 9, the EBG characteristic is generated in the vicinity of 3.5 GHz. Thereby, it can confirm that this waveguide structure has an EBG characteristic.

According to the waveguide structure of the present embodiment, a waveguide structure having an EBG characteristic is obtained by adding the above split ring resonator to a normal parallel plate waveguide. The gap portion 109 of the split ring-shaped resonator 110 behaves as a capacitance, and the other portion behaves as an inductance, thereby forming an LC resonator. The method of mounting the capacitance of the gap 109 has a very large degree of freedom, and the capacitance value does not necessarily correspond to the area occupied by the split ring resonator in a plan view. In addition, since the entire portion other than the gap 109 of the split ring resonator behaves as an inductance, a large inductance value can be easily obtained. For the above reasons, the waveguide structure of the present embodiment can provide a waveguide structure having EBG characteristics with a small mounting area.

The waveguide structure described above can be formed through the following manufacturing process as an example. A multilayer printed circuit board is created by layering a core material with copper foil on both sides and a prepreg, which is a resin material that bonds the core materials together. Next, by drilling holes in the multilayer printed circuit board and plating the inside of the holes with copper, through vias (in the above embodiment, the first conductor via 105 and the second conductor via 106) Form. Clearances (locations without copper foil) are created in advance at locations where it is not desired to connect the layers with through vias, so that the drill holes pass through the clearance. In the above embodiment, a clearance hole is formed in the first conductor plane 102 and the second conductor plane 103 so that the drill hole passes through the clearance hole.

[Second Embodiment]
Next, a waveguide structure having EBG characteristics according to the second embodiment of the present invention will be described. FIG. 10 is a plan view showing a waveguide structure according to the second embodiment of the present invention. 11 is a cross-sectional view taken along line II-II in FIG. FIG. 12 is a cross-sectional view taken along the line II-II of FIG. 10, showing another example of the waveguide structure of the second embodiment of the present invention. 10 to 12 show the periphery of a region where one split ring resonator is arranged. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the present embodiment, at least one of the first connection portion 107, the second connection portion 108a, and the second connection portion 108b is in the same plane as the first conductor plane 102 and the second conductor plane 103. It is characterized by that.

The waveguide structure having the EBG characteristic according to the present embodiment includes the first conductor plane 102 and the second conductor provided on the surface layer or the inner layer of the printed circuit board 101 so as to be substantially parallel to the printed circuit board 101. A split ring-shaped resonator 110 provided on the printed circuit board 101 so that the plane 103 and at least a part of the annular portion thereof are located between the first conductor plane 102 and the second conductor plane 103; Prepare. In FIG. 11, the split ring-shaped resonator 110 is configured in a range surrounded by a rectangular dotted line. When the area between the first conductor plane 102 and the second conductor plane 103 and the area in the plane where the first conductor plane 102 and the second conductor plane exist are defined as the first area 104, The annular portion of the split ring-shaped resonator 110 according to the embodiment is arranged so as to be included in the first region 104. In the cross-sectional views of FIGS. 11 and 12, the split ring resonator is rectangular.

More specifically, the first conductive via 105 and the second conductive via 106 are provided on the printed circuit board 100 so that the first conductive via 105 and the second conductive via 106 are not electrically connected. Clearance holes are formed in the conductor plane 102 and the second conductor plane 103. At this time, the first conductor via 105 and the second conductor via 106 are provided at different positions in plan view.

Further, the first connecting portion 107 is disposed in the clearance hole of the first conductor plane 102. That is, the printed circuit board 101 is provided with the first connection portion 107 that connects the first conductor via 105 and the second conductor via 106 in the same layer as the first conductor plane 102. Further, above or below the first connection portion 107, a second connection portion 108a having one end connected to the first conductor via 105 and the other end extending to the second conductor via 106, and the second connection via A second connection portion 108 b having one end connected to the conductor via 106 and the other end extending to the first conductor via 105 is provided on the printed circuit board 101. In FIG. 11, the second connection portion 108 a and the second connection portion 108 b are arranged in different layers, and the other end portions overlap each other in plan view to form a gap portion 109. . The second connection portion 108a and the second connection portion 108b may be provided in the same layer.

FIG. 12 shows a case where the gap portion 109 is formed by providing a slit in the connection portion so as to divide the wiring. Furthermore, in FIG. 12, both the first connection portion 107, the second connection portion 108 a, and the second connection portion 108 b are in the same plane as the first conductor plane 102 and the second conductor plane 103. It is characterized by. That is, in FIG. 12, the second connection portion 10 a and the second connection portion 108 b are disposed in the clearance hole of the second conductor plane 103. That is, they are arranged on the same layer as the second conductor plane 103.

10 to 12 show the case where the split ring-shaped resonator 110, the first conductor plane 102, and the second conductor plane 103 are not electrically connected by a clearance hole. The conductor plane 102, the second conductor plane 103, and the split ring resonator 110 may not be electrically separated. FIG. 35 is a modification of FIG. For example, as shown in FIG. 35, the first connection portion 107 existing in the same layer as the first conductor plane 102 may be electrically connected. In this case, a part of the first conductor plane behaves as the first connection portion. Even in such a configuration, the split ring resonator 110 is coupled to the parallel plate waveguide formed of the first conductor plane 102 and the second conductor plane 103 via a magnetic field. That is, it can be described by the equivalent circuit of FIG. 6, and the configuration of FIG. 35 also has EBG characteristics. However, in such a configuration, since the inductance value of the first connecting portion 107 becomes small, the frequency band in which the EBG characteristic occurs is increased in frequency, and the area occupied by the split ring resonator in plan view Leads to the expansion of However, since it is not necessary to provide a clearance in the conductor plane, it is possible to expect an effect of suppressing unnecessary radiation of electromagnetic waves.

According to this embodiment, at least one of the first connection portion 107, the second connection portion 108a, and the second connection portion 108b includes the first conductor plane 102, the second connection portion 108b, and the second conductor portion 102b. It exists in the same plane as the second conductor plane 103. The first connection plane 107, the first connection portion 107, the second connection portion 108a, and the second connection portion 10b existing in the same plane as the second conductor plane 103 are the first conductor plane 102 or the second conductor plane 103. It can be formed in the manufacturing process of the second conductor plane 103. Thus, it can be seen that a waveguide structure having EBG characteristics can be provided with less or no additional layers compared to a normal parallel plate waveguide. That is, it is possible to provide a waveguide structure having an EBG characteristic that can be mounted with little or no additional layers.

[Third Embodiment]
Next, a waveguide structure having EBG characteristics according to a third embodiment of the present invention will be described. FIG. 13 is a cross-sectional view showing a waveguide structure according to a third embodiment of the present invention. FIG. 14 is a cross-sectional view showing another example of the waveguide structure according to the third embodiment of the present invention. FIG. 15 is a sectional view showing still another example of the waveguide structure of the third embodiment of the present invention. FIGS. 13 to 15 show the periphery of a region where one split ring resonator is arranged. Since this embodiment is a modification of the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

This embodiment is characterized in that the annular portion of the split ring resonator has a portion that exists outside the first region 104. For example, as shown in FIG. 13, the first connection portion 107, the second connection portion 108 a, and the second connection portion 108 b constituting the split ring resonator are located outside the first region 104. This is the case.

As shown in FIG. 14, the first connection portion 107, the second connection portion 108 b, and the second connection portion 108 c may be located outside the first region 104. In FIG. 14, the second connection portion 108 a is disposed in the first region 104 and one end is connected to the first conductor via 105. The other end of the second connection portion 108 a is a conductor via that passes through the clearance hole of the second conductor plane 103 and is connected to the second connection portion 108 c outside the first region 104. The second connecting portion 108b and the second connecting portion 108c are arranged in different layers, and the gap portion 109 is formed by having a portion overlapping in plan view. In FIG. 14, the first conductor plane 102 and the second conductor plane 103 have a clearance so that the first conductor plane 102 and the second conductor plane 103 are not included inside the annular portion of the split ring resonator. A hole is formed.

The first conductor plane 102 and the second conductor plane 103 located in the split ring resonator are preferably clearance holes as shown in FIGS. 13 and 14, but as shown in FIG. One conductor plane 102 and part of the second conductor plane 103 may exist.

According to the present embodiment, the first connecting portion 107, the second connecting

portions

108 and 108a, the second connecting portion 108b, the second connecting portion 108c, the first conductor via 105, and the second conductor via 106 are used. The circumference of the split ring resonator 110 can be increased, that is, the LC resonance inductance component of the split ring resonator 110 can be increased. According to the equations (3), (5), and (6), increasing the inductance component in the split ring resonator leads to lowering the frequency band in which the EBG characteristics occur. This realizes a split ring resonator having a smaller area in plan view. That is, according to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller area in plan view.

[Fourth Embodiment]
Next, a waveguide structure having EBG characteristics according to a fourth embodiment of the present invention will be described. 16 and 17 are plan views showing the waveguide structure according to the present embodiment. FIG. 20 is a cross-sectional view for explaining still another example of the waveguide structure of the present embodiment. Since this embodiment is a modification of the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

This embodiment is characterized in that the first auxiliary conductor 112 is provided in the gap 109 connected capacitively of the split ring resonator 110 to increase the capacitance. FIG. 16 shows that the rectangular first auxiliary conductor 112 is the same as the first connection portion 107 in the gap 109 of the first connection portion 107 when the first connection portion 107 exists in one layer. This is an example in which the capacitance is increased in the layer. The shape of the first auxiliary conductor 112 may be a square shape as shown in FIG. 16, or may be an interdigital shape as shown in FIG. Other shapes may also be used.

In the example of FIGS. 18, 19, and 20, the first connection portion 107 exists over two different layers, and a part of the first connection portion 107 that exists in one layer and the first connection portion that exists in another layer. The gap portion 109 that is capacitively connected is realized by having a portion that overlaps a part of the connection portion 107 in plan view. In this example, the auxiliary conductor 112 is provided in the gap 109 to increase the capacitance. 18 is a cross-sectional view taken along line III-III in FIG. 20, and FIG. 19 is a cross-sectional view taken along line IV-IV in FIG. As can be seen from FIG. 18, an auxiliary conductor 112 is provided in the first connecting portion 107 connected to the second conductor via 106, and the first connection connected to the first conductor via 105 is understood from FIG. The auxiliary conductor 112 is provided in the part, and the capacitance of the gap part 109 is increased. 18 to 20, a square patch is provided as the first auxiliary conductor 112 to increase the capacitance. However, the shape does not have to be a square, and may be another shape such as a circle. In addition, the auxiliary conductor 112 does not need to be provided in one gap portion 109 as described in the drawing. If there are a plurality of gap portions, a plurality of sets of auxiliary conductors 112 may be provided in the plurality of gap portions 109. Good.

According to the present embodiment, the capacitance component of the LC resonator composed of the split ring resonator can be increased by the auxiliary conductor. According to the equations (3), (5), and (6), increasing the capacitance component of the LC resonator leads to lowering the frequency band in which the EBG characteristics occur. This realizes a smaller split ring resonator. According to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller size.

[Fifth Embodiment]
Next, a fifth embodiment of the waveguide structure according to this embodiment will be described with reference to the drawings. FIG. 21 is a plan view showing a waveguide structure according to a fifth embodiment of the present invention. Since this embodiment is a modification of the first embodiment, detailed description of the same parts as those of the first embodiment will be omitted. The present embodiment considers a straight line in a plane parallel to the first conductor plane 102 of a split ring resonator and connecting the first conductor via 105 and the second conductor via 106. The first conductor via 105 and the second conductor via 106 of another split ring-shaped resonator are in a plane parallel to the first conductor plane 102. It is characterized by having a split ring-shaped resonator 110 different from a split ring-shaped resonator 110 in which a straight line to be connected has a finite angle. This angle is a portion described as “θ” in FIG. In FIG. 21, the case of θ = 90 degrees is shown as an example. However, if the angle is finite, the effect of the present embodiment is obtained, and therefore it is not always necessary that θ = 90 degrees. For example, θ = 30 degrees or 60 degrees may be used. However, the magnitude of θ is preferably close to 90 degrees.

The waveguide structure having EBG characteristics according to the present invention operates when a magnetic field passes through the annular portion of the split ring resonator 110 and current is induced in the LC resonator formed by the split ring resonator. . When the θ between the arranged split ring resonators is all 0 degrees, that is, when the straight lines of all the split ring resonators face the same direction, the first conductor plane 102 The magnetic field component of the electromagnetic wave traveling in the direction perpendicular to the straight line connecting the first conductor via 105 and the second conductor via 106 passes through the annular portion of the split ring resonator. It does not penetrate. For example, the magnetic field component of the electromagnetic wave traveling in the y-axis direction in FIG. 2 does not penetrate the annular portion of the split ring resonator. Therefore, when all the split ring resonators shown in FIG. 2 are arranged in the same direction, the effect of the present invention cannot be obtained only for electromagnetic waves traveling in the y-axis direction. Therefore, by arranging the split ring-shaped resonator 110 so that θ has a finite angle as in this embodiment, with respect to electromagnetic waves having an arbitrary traveling direction propagating in the parallel plate waveguide, A waveguide structure having EBG characteristics can be provided.

[Sixth Embodiment]
Next, a waveguide structure according to a sixth embodiment of the present invention will be described with reference to the drawings. Since this embodiment is a modification of the first embodiment, detailed description of the same parts as those of the first embodiment will be omitted. FIG. 22 is a plan view showing a waveguide structure according to the sixth embodiment of the present invention. FIG. 23 is a plan view showing another example of the waveguide structure according to the sixth embodiment of the present invention.

This embodiment is characterized by having a split ring resonator 110 and another split ring resonator that shares some of the components with the split ring resonator 110. For example, FIG. 22 shows an example in which the conductor via 105 or 106 is shared by two split ring resonators, and FIG. 23 shows a part of the first connection 107 or the second connection 108, or In this example, both of the first connecting portion 107 and the second connecting portion 108 are shared by two split ring resonators.

22 and 23, two split ring resonators are provided. Each split ring resonator includes a first conductor via, a second conductor via, a first connection portion, and a first connection portion. It consists of two connections. In FIG. 22, one of the conductor vias of one split ring resonator and one of the conductor vias of another split ring resonator are shared, and two split ring resonators are connected. In the example of FIG. 22, the straight lines of the respective split ring resonators form an angle of 90 degrees, and thus have an “L” shape structure in plan view. At this time, at least one gap is formed in each or both of the first connection part and the second connection part of each split ring resonator, and each split ring resonator has It is configured to behave independently as an LC resonator. In FIG. 23, a resonator of one split ring and a resonator of another split ring share a part of the connecting portion, and two split ring resonators are connected. In the example of FIG. 23, since the vicinity of the center of the connecting portion is shared and the above-described straight lines of the respective split ring-shaped resonators form an angle of 90 degrees, the plan view has a “+”-shaped structure. It has become. At this time, at least one air gap is formed in each of the first connection portion, the second connection portion, or both of the respective split ring resonators, and the respective split ring resonators. Are configured to behave independently as LC resonators. In FIG. 23, the plan view has a “+” shape. FIGS. 22 and 23 show the case where two split ring resonators share a part of the split ring resonator, but three or more split ring resonators are used. The resonator may share a part of the split ring resonator.

According to the present embodiment, since a part of the split ring resonator 110 is shared with a part of another split ring resonator, a large number of split ring resonators are more densely printed. 101. This leads to a stronger effect of suppressing propagation of electromagnetic waves. That is, according to the present embodiment, a waveguide structure having EBG characteristics for obtaining a stronger electromagnetic wave propagation suppressing effect can be provided.

[Seventh Embodiment]
Next, a waveguide structure according to a seventh embodiment of the present invention will be described with reference to the drawings. Since this embodiment is a modification of the first embodiment, detailed description of the same parts as those of the first embodiment will be omitted. FIG. 24 is a plan view of the waveguide structure according to the present embodiment. FIG. 25 is a cross-sectional view taken along the line VV in FIG. 26 is a cross-sectional view taken along line VI-VI in FIG.

The waveguide structure of the present embodiment is characterized in that a separate ring-shaped resonator 114 is provided at a location translated from the split ring-shaped resonator 110 by a distance d. At this time, it is desirable that the distance d is as small as possible, and it is desirable that the distance d be within λ / 8 at most, where λ is the wavelength of the electromagnetic wave whose propagation is to be suppressed. It should be noted that another split ring resonator 114 that has been translated by a distance d does not necessarily have to have a gap 109 that is capacitively coupled, and may have a structure without a gap as shown in FIG. 26, for example.

The split ring-shaped resonator shown in FIG. 25 includes a first conductor via 105, a second conductor via 106, a first connection portion 107, and a second connection portion 108. The first conductor via 105 and the second conductor via 106 are connected to each other, and the first connection portion 107 is connected to the first conductor via 105 and the second via a gap 109 that is capacitively coupled. The conductive via 106 is connected. On the other hand, another split ring-shaped resonator 114 translated by the distance d shown in FIG. 26 does not have the gap 109, and both the first connection 107 and the second connection 108 are the first. The conductive via 105 and the second conductive via 106 are connected without a gap 109 that is capacitively coupled.

According to the present embodiment, a split ring-shaped resonator 110 and another split ring-shaped resonator 114 that has been translated from the split ring-shaped resonator 110 by a distance d behave as transmission lines. Resonance depending on the transmission line length occurs. That is, EBG characteristics can be obtained in a frequency band in which resonance depending on the transmission line length occurs, instead of LC resonance of a single resonator of a split ring shape.

For example, FIG. 27 shows an electromagnetic field analysis model according to the present embodiment, in which another split ring-shaped resonator obtained by translating a split ring-shaped resonator is added to the electromagnetic field analysis model used in FIG. It is an analysis result of the propagation characteristic. It can be confirmed that the EBG characteristic generated in the vicinity of 3.5 GHz in FIG. 9 is generated in the vicinity of 2.6 GHz in FIG. That is, it can be seen from this example that the frequency can be lowered without changing the size of the split ring resonator. This leads to a smaller split ring resonator. That is, according to the present embodiment, it is possible to provide a waveguide structure having an EBG characteristic having a split ring resonator having a smaller size.

[Eighth Embodiment]
Next, a waveguide structure according to an eighth embodiment of the present invention will be described with reference to the drawings. Since this embodiment is a modification of the seventh embodiment, detailed description of the same parts as those of the seventh embodiment will be omitted. FIG. 28 is a plan view of the waveguide structure according to the present embodiment. 29 is a cross-sectional view taken along line VII-VII in FIG. FIG. 30 is a sectional view taken along line VIII-VIII in FIG. FIG. 31 is a plan view of another example of the waveguide structure according to the present embodiment. 32 is a cross-sectional view taken along line IX-IX in FIG. FIG. 33 is a cross-sectional view taken along line XX of FIG.

In the present embodiment, the split ring-shaped resonator 110 described in the seventh embodiment and the other split ring-shaped resonator 114 obtained by translating the split ring-shaped resonator by a distance d are provided. Two auxiliary conductors 113 are provided, and a capacitance is formed between the split ring resonator 110 and another split ring resonator 114. In FIG. 28, the second auxiliary conductor 113 connected to the first connection portion 107 of the split ring resonator and the first auxiliary portion 107 connected to the first connection portion 107 of another split ring resonator 114. A capacitance is formed between the two auxiliary conductors 113. For example, as shown in FIG. 28, the interdigital second auxiliary conductor 113 may be used to increase the capacitance, or one of the split ring resonator 110 and another split ring resonator 114. The second auxiliary conductor 113 having a rectangular shape may be provided so that the portions are close to each other, thereby increasing the capacitance.

In FIG. 31, the second auxiliary conductor 113 having a rectangular shape is formed by using a layer different from the layer in which the connecting

portions

107 and 108 of the

split ring resonators

110 and 114 are present, and the capacitance is increased. It is an example of an example. As shown in FIG. 33, the second auxiliary conductor 113 is connected to the first connecting portion 107 of the split ring resonator 114, and the second auxiliary conductor 113 is as shown in FIG. 31 and FIG. The first connecting portion 107 of the split ring resonator 110 overlaps in a plan view to form a capacitance. In FIG. 31, the square-shaped second auxiliary conductor 113 is used, but it does not have to be square, and may be any other shape such as a circle or an ellipse. Further, the second auxiliary conductor does not need to be provided at one place as described in the drawings, and a plurality of sets may be provided at a plurality of places.

According to the present embodiment, as described in the seventh embodiment, a certain split ring resonator 110 and another split ring resonator 114 obtained by translating the split ring resonator 110 by a distance d. Behaves as a transmission line and obtains EBG characteristics by causing resonance depending on the transmission line length. In other words, since the frequency characteristic of the waveguide structure having the EBG characteristic described in the seventh embodiment is determined by the transmission line length, a smaller split ring resonator can be realized by reducing the effective transmission line length. It will be possible. In the present embodiment, a second split ring-shaped resonator 110, which is a transmission line, and another split ring-shaped resonator 114 that has been translated from one split ring-shaped resonator 110 by a distance d, is a second transmission ring. This is achieved by forming a capacitance using the auxiliary conductor 113. That is, according to this embodiment, the EBG characteristic of the seventh embodiment can be obtained by using a smaller split ring resonator.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. For example, in the above-described embodiment, the case where the clearance hole is formed in the first conductor plane 102 and the second conductor plane 103 has been described, but the clearance hole may not be formed as shown in FIG. A part of the annular portion of the split ring resonator 110 may be disposed in the first region 104 of FIG. 34A or 34B. 34A is a modification of FIG. 2, and FIG. 34B is a modification of FIG.

Further, in the above-described embodiment, the case where the split ring resonator can be manufactured by a normal printed circuit board manufacturing process and is integrally formed in the waveguide structure is shown, but the present invention is not limited thereto. Not. For example, a component in which a split ring resonator is formed is prepared, and an opening from the surface to the first region 104 is provided in the printed circuit board 101, so that the split ring resonator is formed. It is also conceivable that the waveguide structure of the present invention is inserted into the opening.

As mentioned above, although this invention was demonstrated with reference to preferable embodiment, this invention is not limited to the said embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2012-108197 filed on May 10, 2012, the entire disclosure of which is incorporated herein.

A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
(Additional remark 1) It is provided with the board | substrate, the 1st and 2nd conductor plane provided in the said board | substrate so that it may become substantially mutually parallel, and the division | segmentation ring-shaped resonator, The annular portion and at least one pair of open end pairs in which the annular portion is interrupted, and the open ends constituting the pair of open end pairs are close to each other. At least a part of the annular portion of the split ring resonator is present in a region sandwiched between two conductor planes, and is not substantially parallel to the main surfaces of the first and second conductor planes. A waveguide structure having EBG characteristics, characterized in that the annular portion is provided on the substrate.
(Supplementary Note 2) The annular portion of the split ring resonator has first and second conductor vias provided at positions that do not overlap each other in plan view, the first conductor via, and the second conductor. A first connection portion connecting between the vias, and a second connection portion provided above or below the first connection portion connecting between the first conductor via and the second conductor via. And the open end pair of the split ring-shaped resonator has a gap formed in at least one of the first connection portion and the second connection portion. 2. A waveguide structure having EBG characteristics according to appendix 1.
(Additional remark 3) At least 1 space | gap part currently formed in said 1st connection part and said 2nd connection part, said 1st and said 2nd connection part are said 1st and 2nd conductor planes The waveguide structure having an EBG characteristic according to appendix 2, characterized in that the waveguide structure is formed by having a portion overlapping in a direction substantially perpendicular to the main surface.
(Additional remark 4) At least 1 space | gap part formed in said 1st connection part and said 2nd connection part, said 1st and said 2nd connection part are said 1st and said 2nd conductor plane. The waveguide structure having EBG characteristics according to appendix 2, wherein the waveguide structure is formed by being divided in a plane substantially parallel to the main surface of the substrate.
(Supplementary Note 5) At least one of the first connection portion and the second connection portion is disposed on substantially the same plane as the first conductor plane and the second conductor plane, Any one of appendix 2 to appendix 4, wherein a clearance hole is provided in at least one of the second conductor planes so as not to contact the first connection portion and the second connection portion. A waveguide structure having EBG characteristics as described in one.
(Appendix 6) At least one of the first connection portion and the second connection portion has a portion that exists outside a region sandwiched between the first and second conductor planes, and the first and the second The EBG according to any one of appendix 2 to appendix 4, wherein a clearance hole is provided in at least one of the second conductor planes so as not to contact the split ring resonator. A waveguide structure having characteristics.
(Supplementary note 7) The EBG characteristic according to supplementary note 6, wherein the first and second conductor planes are not present in a region surrounded by the annular portion of the split ring resonator. Having a waveguide structure.
(Supplementary Note 8) At least one of the open ends constituting the open end pair of the split ring resonator has an auxiliary conductor, and the auxiliary conductor constitutes the open end pair. The waveguide structure having an EBG characteristic according to any one of appendix 1 to appendix 7, wherein an area of a portion where the ends are close to each other is increased.
(Supplementary note 9) A plurality of the split ring resonators are arranged on the substrate, and connect the first conductor via and the second conductor via of one split ring resonator. A first straight line that lies in a plane substantially parallel to the second conductor plane and connects the first conductor via and the second conductor via of the other split ring resonator; The EBG characteristic according to any one of appendix 2 to appendix 8, wherein the first straight line and the second straight line in a plane substantially parallel to the second conductor plane form a finite angle. Having a waveguide structure.
(Supplementary note 10) The waveguide structure having EBG characteristics according to supplementary note 9, wherein the first straight line and the second straight line form an angle of 90 degrees.
(Supplementary Note 11) A plurality of the split ring resonators are arranged on the substrate, and among the plurality of split ring resonators, at least one set of split ring resonators sharing a component is provided. A waveguide structure having EBG characteristics according to any one of Supplementary Note 1 to Supplementary Note 10, wherein the waveguide structure is a pair.
(Supplementary Note 12) A plurality of the split ring resonators are arranged on the substrate, and the first conductor via of the one split ring resonator among the plurality of split ring resonators or the There is at least one split ring resonator set in which the second conductor via and the first conductor via or the second conductor via of the other split ring resonator are shared. 14. A waveguide structure having EBG characteristics according to appendix 11.
(Supplementary Note 13) A plurality of the split ring resonators are arranged on the substrate, and the first connection portion of the one split ring resonator among the plurality of split ring resonators or the There is at least one split ring resonator set in which the second connection portion and the first connection portion or the second connection portion of the other split ring resonator are connected. 14. A waveguide structure having EBG characteristics according to appendix 11.
(Supplementary note 14) A ring-shaped conductor is disposed in the vicinity of the split ring-shaped resonator at a position translated by a predetermined distance, and the ring-shaped conductor includes the split ring-shaped resonator, or The waveguide structure having an EBG characteristic according to any one of appendices 1 to 13, wherein the waveguide structure has only an annular portion having no open end pair in the split ring resonator. .
(Supplementary note 15) At least one of the split ring resonator and the ring conductor has a second auxiliary conductor, and the second auxiliary conductor includes the split ring resonator and the ring. 15. The waveguide structure having EBG characteristics according to appendix 14, wherein an area of a portion facing the resonator is increased.

DESCRIPTION OF SYMBOLS 101 Printed circuit board 102 1st conductor plane 103 2nd conductor plane 104 1st area | region 105 1st conductor via 106 2nd conductor via 107, 107a, 107b

1st connection part

108, 108a, 108b, 108c 1st Second connection 109 Gap 110 Split ring resonator (unit structure)
111 Electronic Device 112 First Auxiliary Conductor 113 Second Auxiliary Conductor 114 Resonator (Unit Structure)

Claims

A substrate, first and second conductor planes provided on the substrate so as to be substantially parallel to each other, and a split ring-shaped resonator;
The split ring-shaped resonator includes an annular portion and at least one pair of open end pairs in which the annular portion is interrupted, and the open ends constituting the set of open end pairs are adjacent to each other. And
At least a part of the annular portion of the split ring resonator is present in a region sandwiched between the first and second conductor planes, and is substantially relative to the main surfaces of the first and second conductor planes. A waveguide structure having EBG characteristics, wherein the annular portion is provided in a direction that is not parallel to each other.
The annular portion of the split ring-shaped resonator is provided between the first and second conductor vias provided at positions that do not overlap each other in plan view, and between the first conductor via and the second conductor via. A first connection part for connecting the first connection via and a second connection part provided above or below the first connection part for connecting the first conductor via and the second conductor via. Configured with
2. The open end pair of the split ring resonator is configured such that a gap is formed in at least one of the first connection portion and the second connection portion. A waveguide structure having the EBG characteristic described in 1.
At least one gap formed in the first connection portion and the second connection portion is formed so that the first and second connection portions are on the main surfaces of the first and second conductor planes. The waveguide structure having an EBG characteristic according to claim 2, wherein the waveguide structure is formed by having a portion overlapping in a direction substantially perpendicular to the waveguide.
At least one gap portion formed in the first connection portion and the second connection portion, the first and second connection portions are on the main surfaces of the first and second conductor planes. The waveguide structure having an EBG characteristic according to claim 2, wherein the waveguide structure is formed by being divided in a plane substantially parallel to the waveguide.
At least one of the first connection portion and the second connection portion is disposed on substantially the same surface as the first conductor plane and the second conductor plane,
The clearance hole is provided in at least one of said 1st and said 2nd conductor plane so that it may not contact said 1st connection part and 2nd connection part, The thru | or 2 thru | or characterized by the above-mentioned. The waveguide structure which has the EBG characteristic as described in any one of Claim 4.
At least one of the first connection portion and the second connection portion has a portion that exists outside the region sandwiched between the first and second conductor planes,
The clearance hole is provided in at least one of said 1st and said 2nd conductor plane so that it may not contact with the said division | segmentation ring-shaped resonator, Any of Claim 2 thru | or 4 characterized by the above-mentioned. A waveguide structure having the EBG characteristic according to claim 1.
At least one of the open ends constituting the open end pair of the split ring resonator has an auxiliary conductor,
The EBG characteristic according to any one of claims 1 to 6, wherein the auxiliary conductor increases an area of a portion where each open end constituting the open end pair is adjacent. Having a waveguide structure.
A plurality of the split ring resonators are arranged on the substrate,
A first straight line in a plane substantially parallel to the first and second conductor planes connecting the first conductor via and the second conductor via of one split ring resonator; A second straight line in a plane substantially parallel to the first and second conductor planes connecting the first conductor via and the second conductor via of the other split ring resonator. The waveguide structure having an EBG characteristic according to any one of claims 2 to 7, wherein and have a finite angle.
A plurality of the split ring resonators are arranged on the substrate,
9. The device according to claim 1, wherein among the plurality of divided ring-shaped resonators, there is at least one set of divided ring resonators sharing a component. 10. A waveguide structure having the described EBG characteristics.
In the vicinity of the split ring resonator, a ring conductor is arranged at a position translated by a predetermined distance,
The said ring-shaped conductor is a structure comprised only by the annular part which does not have an open end pair in the said split ring-shaped resonator or the said split ring-shaped resonator. The waveguide structure which has the EBG characteristic as described in any one of Claim 9.