JP2011223241A - Cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology to suppress an disadvantage in which a noise in wide band including a high-frequency wave of about several GHz is transmitted along a cable.SOLUTION: The present invention provides a cable comprising a signal line 1, a first dielectric layer 2 covering a circumference of the signal line 1, a first conductor 3 including a island-shaped conductor partly covering a circumference of the first dielectric layer 2, a second dielectric layer 4 covering a circumference of the first conductor 3, and a second conductor 5 covering a circumference of the second dielectric layer 4.

Description

  The present invention relates to a cable.

  There is a cable having a signal line, a dielectric layer covering the outer periphery of the signal line, and a conductor covering the outer periphery of the dielectric layer. Such a cable is used, for example, to connect two devices and to propagate a signal from one device to another device.

  The cable having the above function has a problem that noise is unintentionally propagated. For example, noise current generated on a printed circuit board in a device moves to a cable via a connector and propagates through a conductor covering the outer periphery of the dielectric layer, or as an electromagnetic wave of a cable made of a dielectric layer or vinyl. It may propagate through the coating layer and the surrounding air.

  In recent years, as the frequency used for electronic devices becomes higher, the band of generated noise shifts in the high frequency direction, and reaches, for example, several GHz.

  Therefore, a means for suppressing wideband noise including high frequency from propagating along the cable is desired.

  Here, in Patent Document 1, by arranging an EBG (Electromagnetic Band Gap) structure around the connector on the printed circuit board, noise in a wide band including high frequencies is transferred to the connector. Means for preventing this are disclosed.

JP 2008-236027 A

  With the technique described in Patent Document 1, when noise moves to the cable for an unexpected reason, it is not possible to suppress noise propagation along the cable.

  An object of the present invention is to suppress noise propagation along a cable when noise in a wide band including a high frequency of about several GHz is transferred to the cable.

  According to the present invention, a signal line, a first dielectric layer covering an outer periphery of the signal line, a first conductor having an island-like conductor partially covering the outer periphery of the first dielectric layer, There is provided a cable having a second dielectric layer covering the outer periphery of the first conductor and a second conductor covering the outer periphery of the second dielectric layer.

  According to the present invention, the signal line having the dielectric part and the conductor part covering the outer periphery thereof, the third dielectric layer covering the outer periphery of the signal line, and the outer periphery of the third dielectric layer are provided. A third conductor covering, the conductor portion of the signal line has an opening, and the opening is electrically connected to the conductor portion through one end side in the opening. A cable having wiring is provided.

  According to the invention, there is provided a signal line, a first dielectric layer covering the outer periphery of the signal line, and a fourth conductor covering the outer periphery of the first dielectric layer and having an opening. A cable having a fourth wiring electrically connected to the fourth conductor is provided inside the opening of the fourth conductor.

  According to the present invention, it is possible to suppress a wide band noise including a high frequency of about several GHz from propagating along the cable.

3 is a perspective view schematically showing an example of the cable of Embodiment 1. FIG. 3 is a cross-sectional view schematically showing an example of the cable of Embodiment 1. FIG. 3 is a cross-sectional view schematically illustrating an example of an EBG structure included in the cable of Embodiment 1. FIG. It is a perspective view which shows typically an example of the EBG structure which the cable of Embodiment 1 has. 3 is an equivalent circuit diagram of a unit cell of an EBG structure included in the cable of Embodiment 1. FIG. It is a perspective view which shows an example of the cable of Embodiment 2 typically. 6 is a cross-sectional view schematically illustrating an example of a cable according to Embodiment 2. FIG. 10 is a plan view schematically showing an example of a first conductor of a cable of Embodiment 3. FIG. It is a perspective view which shows an example of the cable of Embodiment 4 typically. 6 is an equivalent circuit diagram of a unit cell of an EBG structure included in the cable of Embodiment 4. FIG. FIG. 10 is a plan view schematically illustrating an example of a fourth conductor of the cable according to the fifth embodiment. FIG. 10 is a perspective view schematically illustrating an example of a cable according to a seventh embodiment. FIG. 10 is a cross-sectional view schematically illustrating an example of a cable according to Embodiment 7. FIG. 10 is a plan view schematically illustrating an example of a conductor portion of a cable according to a seventh embodiment. FIG. 10 is a plan view schematically illustrating an example of a fourth conductor of a cable according to a sixth embodiment. FIG. 10 is a plan view schematically illustrating an example of a conductor portion of a cable according to an eighth embodiment.

  Hereinafter, embodiments of the present invention for solving the above-described problems will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

<Embodiment 1>
FIG. 1 is a perspective view schematically showing an example of a part of the cable of the present embodiment. FIG. 2 shows a cross-sectional view of the cable of FIG.

  As shown in FIGS. 1 and 2, the cable of this embodiment includes a signal line 1, a first dielectric layer 2 (see FIG. 2) that covers the outer periphery of the signal line 1, and a first dielectric layer 2. A first conductor 3 having a repetitive structure in at least a partial region, a second dielectric layer 4 (see FIG. 2) covering the outer periphery of the first conductor 3, and a second It has the 2nd conductor 5 which covers the outer periphery of the dielectric material layer 4, and the 1st connection member 6 provided in the inside of the 2nd dielectric material layer 4. FIG. The signal line 1 and the first conductor 3 are opposed to each other with the first dielectric layer 2 interposed therebetween. The first conductor 3 and the second conductor 5 are opposed to each other with the second dielectric layer 4 interposed therebetween.

  The signal line 1 is a line for propagating a signal, and can be composed of a conductive material such as copper. The cable of this embodiment has one signal line 1 as shown in FIGS.

  The first dielectric layer 2 is configured to cover the outer periphery of the signal line 1. The material of the first dielectric layer 2 is not particularly limited, but can be made of, for example, polyethylene or air.

  Note that the signal line 1 and the first dielectric layer 2 described above can have any configuration using conventional techniques.

  The first conductor 3 covers the outer periphery of the first dielectric layer 2 and has a repetitive structure in at least a partial region. The repetitive structure of the present embodiment is composed of a plurality of island-shaped conductors separated along the longitudinal direction of the cable as shown in FIG. That is, the island-shaped conductors are repeatedly arranged along the longitudinal direction of the cable, for example, periodically arranged to constitute a repeating structure. Note that “repetition” of the island-shaped conductor includes a case where the island-shaped conductor is partially missing. In addition, “periodic” of the island-shaped conductors includes a case where the arrangement of some of the island-shaped conductors is shifted. As will be described below, this island-shaped conductor becomes a part of the constituent elements of the EBG structure, but even when the “periodic” of the island-shaped conductor does not satisfy the “periodic” in the strict sense, The characteristic as a metamaterial of the EBG structure which uses an island-like conductor as a component can be obtained. For this reason, a certain amount of defects are allowed in the “periodic” of the island-shaped conductor. In addition, the characteristic as a metamaterial of the EBG structure in which the island-shaped conductor is a part of the constituent element can be obtained even when only one island-shaped conductor is arranged instead of repeatedly arranging the island-shaped conductor. There is a case. Such an embodiment is shown below.

  Further, “at least in a partial region” means that the cable may have a repeating structure over the entire length of the cable, or may have a repeating structure in part. That is, the island-shaped conductor (first conductor 3) may be provided over the entire length of the cable, or may be provided only in a partial region. Thus, even if it is a case where it provides only in a partial region, the characteristic as a metamaterial of the EBG structure which uses an island-like conductor (1st conductor 3) as a part of component can be acquired.

  The raw material of the first conductor 3 is not particularly limited, and for example, copper or the like can be selected. The planar shape of the island-like conductor (first conductor 3) is not particularly limited. As shown in FIGS. 1 and 2, in addition to a rectangle, a triangle, other quadrangle, a pentagon, and a polygon having more vertices are used. Any shape can be selected, such as circular. The cable of the present embodiment has a configuration in which such a planar island-shaped conductor (first conductor 3) is wound along the outer periphery of the first dielectric layer 2. 1 and 2, each island-like conductor (first conductor 3) wound along the outer periphery of the first dielectric layer 2 has a slit, but is not limited to such a configuration. It is also possible to adopt a configuration without a slit. Moreover, in FIG. 1, although the slit position is located in a line, it is not limited to such a configuration.

  Furthermore, the island-shaped conductor (first conductor 3) may be composed of two or more types of island-shaped conductors (first conductor 3) having different sizes and / or shapes. In such a case, it is desirable that two or more types of island-shaped conductors (first conductors 3) are periodically arranged in various ways. In addition, “periodic” may be a case where some island-like conductors (first conductors 3) are missing or the arrangement is shifted, that is, the case where “periodic” in a strict sense is not satisfied. It is a concept that includes. The size of the island-like conductor (first conductor 3), the mutual interval, and the like are design matters determined according to the frequency of noise that suppresses propagation.

  The second dielectric layer 4 is configured to cover the outer periphery of the first conductor 3. The material of the second dielectric layer 4 is not particularly limited, but can be composed of, for example, polyethylene or air.

  The second conductor 5 is configured to cover the outer periphery of the second dielectric layer 4. The second conductor 5 can be made of a conductive material such as copper. Note that the second conductor 5 may be formed in a knitted shape for the purpose of improving flexibility. The second conductor 5 may be a laminated body in which two or more conductors are laminated.

  The second dielectric layer 4 and the second conductor 5 described above have a signal line, a dielectric layer that covers the outer periphery of the signal line, and a conductor that covers the outer periphery of the dielectric layer. In the cable, any configuration using the conventional technology relating to the conductor covering the dielectric layer and the outer periphery thereof can be used.

  The first connecting member 6 is provided inside the second dielectric layer 4 and is configured to electrically connect the second conductor 5 and the island-shaped conductor (first conductor 3). . The 1st connection member 6 can be comprised with metals, such as copper, aluminum, stainless steel, for example. The first connection members 6 are repeatedly arranged along the longitudinal direction of the cable. However, the first connection members 6 may be provided so as to correspond to all the island-shaped conductors (first conductors 3). May be provided so as to correspond to the part of the island-shaped conductor (first conductor 3). That is, all the island-shaped conductors (first conductor 3) may be electrically connected to the second conductor 5, or a part of the island-shaped conductors (first conductor 3) may be connected to the second conductor 5. And may be electrically connected.

  As will be described below, the first connection member 6 is a part of the constituent elements of the EBG structure, but may be provided periodically or not. In any case, it is possible to obtain characteristics as a metamaterial of an EBG structure in which the first connecting member 6 is a part of the constituent elements. However, when such a first connection member 6 is provided periodically, the EBG structure including the first connection member 6 as a constituent element causes Bragg reflection to widen the band gap band. For this reason, it is desirable that the first connecting member 6 be provided periodically. Here, “periodic” is a concept including a case where the arrangement of some of the first connecting members 6 itself is deviated, that is, a case where “periodic” in a strict sense is not satisfied.

  The cable of this embodiment may cover the outer periphery of the second conductor 5 and provide a coating layer (not shown) that is the outermost layer of the cable. The covering layer can be made of a material such as vinyl, rubber, urethane, etc., like the outermost layer of a general cable.

  Although the manufacturing method of the cable of this embodiment is not particularly limited, the following manufacturing method may be used.

  For example, in accordance with the prior art, after forming a structure composed of the signal line 1 and the first dielectric layer 2 covering the outer periphery of the signal line 1, a plurality of island-shaped conductors (first conductors 3) are formed. And wound around the outer periphery of the first dielectric layer 2 so as to be repeatedly arranged along the longitudinal direction of the cable. Thereafter, in accordance with the prior art, the second dielectric layer 4 is formed so as to cover the outer periphery of the plurality of island-shaped conductors (second conductors 5).

  Next, a hole reaching the island-shaped conductor (first conductor 3) is formed in the second dielectric layer 4 using a drill or the like. This hole is provided repeatedly (for example, periodically) along the longitudinal direction of the cable. This hole may be provided over the entire length of the cable, or may be provided in a partial region.

  Next, the connecting member 6 made of a metal such as copper, aluminum, or stainless steel is inserted into the hole provided by the above processing. It is desirable that the length of the connecting member 6 is the same as or slightly longer than the thickness of the second dielectric layer 4.

  Thereafter, the second conductor 5 is formed so as to cover the outer periphery of the second dielectric layer 4. By forming the second conductor 5, the connecting member 6 is fixed in contact with the island-shaped conductor (first conductor 3) and in contact with the second conductor 5.

  Next, the effect of the cable of this embodiment is demonstrated.

  The cable of this embodiment forms an EBG structure as shown in FIGS. 3 and 4 by the signal line 1, the first conductor 3, the second conductor 5, and the first connecting member 6. ing. FIG. 3 is a cross-sectional view schematically showing the configuration of the EBG structure, and FIG. 4 is a perspective view of the EBG structure of FIG.

  The EBG structure shown in FIGS. 3 and 4 includes a sheet-like first conductor pattern 2A, a sheet-like second conductor pattern 4A, an island-like third conductor pattern 1A, and a connecting member 3A. . The second conductor pattern 4A extends in a region overlapping the first conductor pattern 2A in plan view, and is disposed at a position away from the first conductor pattern 2A with a dielectric (not shown) interposed therebetween. Yes. The third conductor pattern 1A is disposed between the first conductor pattern 2A and the second conductor pattern 4A. Note that the number of the third conductor patterns 1A arranged is not limited to that shown in the drawing, and any design can be made with at least one vertical row and at least one horizontal row. The connecting member 3A connects the third conductor pattern 1A to the first conductor pattern 2A. The EBG structure includes one island-shaped third conductor pattern 1A, a connecting member 3A connected to the island-shaped third conductor pattern 1A, and the island-shaped third conductor pattern 1A of the first conductor pattern 2A. And a unit cell A that constitutes an EBG structure including a partial region including a region opposed to the second conductive pattern 4A and a partial region including a region opposed to the island-shaped third conductive pattern 1A of the second conductive pattern 4A. However, when there are a plurality of unit cells A, the plurality of unit cells A are repeatedly arranged. For example, as shown in the figure, the unit cells A may be arranged with periodicity. Such a unit cell A and a structure in which the unit cells A are repeatedly arranged, for example, periodically function as a metamaterial, for example, an EBG (Electromagnetic Band Gap).

  Here, “repetition” of the unit cell A includes a case where a part of the configuration is missing in any unit cell A. When the unit cell A has a two-dimensional array, “repetition” includes a case where the unit cell A is partially missing. In addition, in “periodicity”, some of the constituent elements (third conductor pattern 1A, connecting member 3A) are shifted in some unit cells A, or the arrangement of some unit cells A itself is shifted. It is also included. In other words, even when the periodicity in the strict sense is broken, a characteristic as a metamaterial can be obtained, so that a certain degree of defect is allowed for the “periodicity”. The above-mentioned premise is the same in all the following embodiments.

  This EBG structure is an EBG structure having a so-called mushroom structure, and the distance between the third conductor pattern 1A and the second conductor pattern 4A, the distance between the second conductor pattern 4A and the first conductor pattern 2A, and the thickness of the connecting member 3A. By adjusting the length and length, the frequency band that becomes the band gap can be adjusted. FIG. 5 shows an equivalent circuit diagram of the unit cell A of the EBG structure shown in FIGS.

  According to this EBG structure, the propagation of noise in the space between the first conductor pattern 2A and the second conductor pattern 4A (including the surfaces of the first conductor pattern 2A and the second conductor pattern 4A facing each other) is also achieved. It becomes possible to suppress.

  The cable of this embodiment has the EBG structure shown in FIGS. That is, the signal line 1 functions as the second conductor pattern 4A of the EBG structure shown in FIGS. 3 and 4, and the island-like conductor (first conductor 3) is the third conductor pattern of the EBG structure shown in FIGS. 1A, the second conductor 5 functions as the first conductor pattern 2A of the EBG structure shown in FIGS. 3 and 4, and the first connection member 6 is the connection member 3A of the EBG structure shown in FIGS. Function as.

  According to the cable of this embodiment, noise electromagnetic waves propagate through the first dielectric layer 2 and the second dielectric layer 4 existing between the second conductor 5 and the signal line 1. It becomes possible to suppress. In addition, it is possible to suppress the propagation of noise current through the surface of the second conductor 5 that faces the signal line 1.

  In the cable of the present embodiment, the distance between the island-shaped conductor (first conductor 3) forming the C (capacitance) and the signal line 1, and the distance between the signal line 1 and the second conductor 5, L By adjusting the thickness and length of the first connecting member 6 forming (inductance), the frequency band that becomes the band gap can be adjusted.

  In addition, the effect of the cable of this embodiment cannot be implement | achieved only by combining a cable and an EBG structure.

  A signal line, a dielectric layer that covers the outer periphery of the signal line, and a conductor that covers the outer periphery of the dielectric layer (hereinafter referred to as “outer peripheral conductor”), When the EBG structure as shown in 3 and 4 is simply provided, a dielectric layer exists between the first conductor pattern 2A and the second conductor pattern 4A of the EBG structure, the signal line, and the outer conductor. Will be. In such a case, the present inventor has discovered that noise propagates through the dielectric layer.

  The cable of this embodiment also solves the above problem by using the signal line and the outer peripheral conductor as part of the constituent elements of the EBG structure.

<Embodiment 2>
FIG. 6 is a perspective view schematically showing an example of a part of the cable of the present embodiment. FIG. 7 shows a cross-sectional view of the cable of FIG.

  As shown in FIGS. 6 and 7, the cable of the present embodiment is based on the configuration of the first embodiment, and is different in that it does not have the first connection member 6 but has the second connection member 7.

  The second connection member 7 is provided inside the first dielectric layer 2 and is configured to electrically connect the signal line 1 and the island-shaped conductor (first conductor 3). The 2nd connection member 7 can be comprised with metals, such as copper, aluminum, stainless steel, for example. The second connection members 7 are repeatedly arranged along the longitudinal direction of the cable. However, the second connection members 7 may be provided so as to correspond to all the island-like conductors (first conductors 3). May be provided so as to correspond to the part of the island-shaped conductor (first conductor 3). That is, all of the island-shaped conductors (first conductor 3) may be electrically connected to the signal line 1, or some island-shaped conductors (first conductor 3) may be electrically connected to the signal line 1. You may connect.

  As will be described below, the second connection member 7 is a part of the constituent elements of the EBG structure, but may be provided periodically or not. In any case, when the second connecting member 7 is repeatedly arranged, the characteristics as the metamaterial of the EBG structure having the second connecting member 7 as a part of the constituent elements are obtained. Can do. However, when such a second connecting member 7 is provided periodically, the EBG structure including the second connecting member 7 as a constituent element causes Bragg reflection to widen the band gap band. For this reason, it is desirable that the second connection member 7 be provided periodically. Here, “periodic” is a concept including a case where the arrangement of some of the second connecting members 7 is shifted, that is, a case where the “periodic” in a strict sense is not satisfied.

  The manufacturing method of the cable of this embodiment is not particularly limited, and can be realized according to the manufacturing method described in Embodiment 1, for example.

  Next, the effect of the cable of this embodiment is demonstrated.

  The cable of the present embodiment includes an EBG as shown in FIGS. 3 and 4 by the signal line 1, the first conductor 3, the second conductor 5, and the second connecting member 7, as in the first embodiment. It constitutes a structure. That is, the cable of this embodiment has the EBG structure shown in FIGS. However, in the cable of this embodiment, the signal line 1 functions as the first conductor pattern 2A of the EBG structure shown in FIGS. 3 and 4, and the second conductor 5 is the second of the EBG structure shown in FIGS. It differs from the cable of Embodiment 1 in that it functions as the conductor pattern 4A and the second connecting member 7 functions as the connecting member 3A of the EBG structure shown in FIGS.

  According to the cable of this embodiment, noise electromagnetic waves propagate through the first dielectric layer 2 and the second dielectric layer 4 existing between the second conductor 5 and the signal line 1. It becomes possible to suppress. In addition, it is possible to suppress the propagation of noise current through the surface of the second conductor 5 that faces the signal line 1.

  In the cable of the present embodiment, the distance between the island-shaped conductor (first conductor 3) forming the C (capacitance) and the second conductor 5, and the distance between the signal line 1 and the second conductor 5 are as follows. By adjusting the thickness and length of the second connecting member 7 forming L (inductance), the frequency band that becomes the band gap can be adjusted.

<Embodiment 3>
The cable of the present embodiment is based on the configuration of the first or second embodiment, and the configuration of the island-shaped conductor (first conductor 3) is different.

  In FIG. 8, an example of the planar shape of the island-shaped conductor (1st conductor 3) of this embodiment is shown. As shown in FIG. 8, an opening 8 is provided in the island-shaped conductor (first conductor 3) of the present embodiment, and one end of the island-shaped conductor (first conductor 3) is in the opening 8. A first wiring 9 (or second wiring 10) that is electrically connected and whose other end is electrically connected to the first connecting member 6 (or second connecting member 7) is provided.

  The other end of the first wiring 9 is electrically connected to the first connecting member 6. The other end of the second wiring 10 is electrically connected to the second connecting member 7. The wiring provided in each opening 8 in one cable may be all the first wiring 9 or the second wiring 10, or the opening 8 provided with the first wiring 9 and the first wiring 9. The opening 8 provided with the two wirings 10 may be mixed. In the case of coexistence, it is desirable that various types are arranged periodically (eg, every other piece). Note that “periodic” means that a part of the opening 8 provided with the first wiring 9 or the second wiring 10 is missing or misaligned, that is, “periodic” in a strict sense. It is a concept that includes cases that do not satisfy the target.

  The shape of the opening 8 is not limited to the illustrated rectangle, and any shape such as a triangle, another quadrangle, a pentagon, a polygon having more vertices, or a circle can be selected. Further, the opening 8 may be provided in all island-like conductors (first conductor 3) as shown in the figure, but is not limited thereto, and is provided in some island-like conductors (first conductor 3). May be. When the openings 8 are provided in some island-like conductors (first conductors 3), it is desirable to provide them periodically (eg, every other piece). Note that “periodic” is a concept including a case where some of the openings 8 are missing or the arrangement is shifted, that is, a case where the “periodic” in a strict sense is not satisfied.

  The first wiring 9 and the second wiring 10 can be made of a conductive material such as copper, for example. The shape is not limited to a straight line as shown in the figure, and may be other shapes such as a curve. The first wiring 9 and the second wiring 10 may form a spiral shape inside the opening 8. The first wiring 9 and the second wiring 10 are preferably connected to the first connecting member 6 and the second connecting member 7 through the other ends as shown in FIG. If comprised in this way, the distance between an island-like conductor (1st conductor 3) and the 1st connection member 6 or the 2nd connection member 7 can be lengthened, and L in an EBG structure body (Inductance) can be further increased.

  The manufacturing method of the cable of this embodiment is not particularly limited, and can be realized according to the manufacturing method described in Embodiment 1, for example.

  That is, after forming a structure composed of the signal line 1 and the first dielectric layer 2 and forming the second connecting member 7 as necessary, on the outer periphery of the first dielectric layer 2, The island-shaped conductor (first conductor 3) of the present embodiment, for example, a plurality of island-shaped conductors (first conductor 3) formed in a shape as shown in FIG. 8 are repeatedly arranged along the longitudinal direction of the cable. Wrap so that. Thereafter, it can be manufactured according to the manufacturing method described in the first embodiment. The direction of the island-shaped conductor (first conductor 3) wound around the outer periphery of the first dielectric layer 2 is not particularly limited. That is, the longitudinal direction of the linear first wiring 9 (or the second wiring 10) as shown in FIG. 8 may be substantially parallel to the longitudinal direction of the cable, or the first wiring 9 (or The longitudinal direction of the second wiring 10) may be substantially perpendicular to the longitudinal direction of the cable.

  Note that the plurality of island-shaped conductors (first conductors 3) formed in the shape shown in FIG. 8 are attached to one surface with tape or the like, and the positions of the first wirings 9 (or the second wirings 10). May be fixed.

  Next, the effect of the cable of this embodiment is demonstrated.

  The cable of the present embodiment includes the signal line 1, the first conductor 3, the first wiring 9 (or the second wiring 10), the second conductor 5, and the first connecting member 6 (or the first connecting member 6). Thus, an EBG structure having unit cells having the same equivalent circuit as the unit cell of the EBG structure as shown in FIGS. However, in the EBG structure included in the cable of the present embodiment, the island-shaped conductor (first conductor 3) is provided with the opening 8, and the first wiring 9 (or the second wiring 10 provided in the opening 8). ) To connect the island-shaped conductor (first conductor 3) and the first connecting member 6 (or second connecting member 7), the EBG structure shown in FIGS. The length of the connecting member 3A is made longer than that of the cables of the first and second embodiments. That is, when the length of the first connection member 6 (or the second connection member 7) is the same as that of the first embodiment (or the second embodiment), the EBG structure of the present embodiment is the first embodiment. L (inductance) due to the connecting member 3A shown in FIGS. 3 and 4 is larger than that of the EBG structures of FIGS.

  According to the cable of this embodiment, noise electromagnetic waves propagate through the first dielectric layer 2 and the second dielectric layer 4 existing between the second conductor 5 and the signal line 1. It becomes possible to suppress. In addition, it is possible to suppress the propagation of noise current through the surface of the second conductor 5 that faces the signal line 1.

  In the cable of this embodiment, the distance between the island-shaped conductor (first conductor 3) forming the C (capacitance) and the signal line 1 (or the second conductor 5), and the signal line 1 and the second , The thickness and length of the first connecting member 6 (or the second connecting member 7) and the first wiring 9 (or the second wiring 10) forming an interval with the conductor 5 and L (inductance). By adjusting the length and the like, the frequency band that becomes the band gap can be adjusted.

  In the cable of this embodiment, L (inductance) is formed not only by the first connection member 6 (or the second connection member 7) but also by the first wiring 9 (or the second wiring 10). Therefore, the length of the first connecting member 6 (or the second connecting member 7) for forming a desired L (inductance) can be made shorter than the cables of the first and second embodiments. It becomes possible. In such a case, the thickness of the second dielectric layer 4 (or the first dielectric layer 2) can be reduced, and as a result, a thinner and lighter cable than the cables of the first and second embodiments is realized. Is done.

<Embodiment 4>
The cable of this embodiment is based on Embodiment 1 or 2, and the configuration of the island conductor (first conductor 3) is different.

  FIG. 9 is a perspective view schematically showing an example of a part of the cable of the present embodiment. As shown in FIG. 9, the island-shaped conductor (first conductor 3) of the present embodiment is formed in a band shape, and is electrically connected to the signal line 1 via the second connection member 7 at one end side, The outer periphery of the first dielectric layer 2 (not shown) covering the outer periphery of the wire 1 is circulated. The configuration of FIG. 9 is an example, and although not shown in the drawings, the island-shaped conductor (first conductor 3) formed in a band shape is the second conductor via the first connecting member 6 on one end side. The outer periphery of the first dielectric layer 2 that is electrically connected to 5 and covers the outer periphery of the signal line 1 may be circulated.

  Further, in one cable, all the island-shaped conductors (first conductors 3) may be electrically connected only to either the first connection member 6 or the second connection member 7, or The island-shaped conductor (first conductor 3) connected to the first connecting member 6 and the island-shaped conductor (first conductor 3) connected to the second connecting member 7 may be mixed. In the case of coexistence, it is desirable that various types are arranged periodically (eg, every other piece). “Periodic” means a part of the island-shaped conductor (first conductor 3) connected to the first connecting member 6 or the island-shaped conductor (first conductor 3) connected to the second connecting member 7. This is a concept including a case where the symbol is missing or a case where the arrangement is shifted, that is, a case where “periodic” in a strict sense is not satisfied.

  The length and width of the strip-shaped island-shaped conductor (first conductor 3) are design matters determined according to the frequency of noise that suppresses propagation. Note that all the island-shaped conductors (first conductors 3) may be formed in a band shape, or some of the island-shaped conductors (first conductors 3) may be formed in a band shape. When some island-shaped conductors (first conductors 3) are formed in a strip shape, the strip-shaped island-shaped conductors (first conductors 3) are periodically arranged (for example, every other piece). Is desirable. In addition, “periodic” does not satisfy “periodic” in a strict sense when a part of the band-like island-shaped conductors (first conductor 3) is missing or the arrangement is shifted. It is a concept that includes cases.

  The manufacturing method of the cable of this embodiment is not particularly limited, and can be realized according to the manufacturing method described in Embodiment 1, for example.

  Next, the effect of the cable of this embodiment is demonstrated.

  The cable according to the present embodiment forms an EBG structure by the signal line 1, the first conductor 3, the second conductor 5, and the second connection member 7 (or the first connection member 6). is doing. The strip-shaped island-shaped conductor (first conductor 3) of the present embodiment functions as an open stub, and the strip-shaped island-shaped conductor (first conductor 3) of the second conductor 5 (or signal line 1). And a strip-like island-shaped conductor (first conductor 3) form a transmission line, for example, a microstrip line.

  Here, FIG. 10 shows an equivalent circuit diagram of the unit cell A of the EBG structure included in the cable of this embodiment. In addition, the code | symbol shown in FIG. 10 has attached | subjected the code | symbol corresponding to the cable shown in FIG.

  As shown in FIG. 10, the unit cell A is formed between the sheet-like second conductor pattern 4A and the island-like third conductor pattern 1A in the EBG structure shown in FIGS. C (capacitance) is changed to an open end transmission line. That is, in the second embodiment, C (capacitance) formed between the second conductor 5 and the island-shaped conductor (first conductor 3) is the second conductor 5 in the present embodiment. It is changed to an open end transmission line formed by an island-shaped conductor (first conductor 3).

  According to the cable of this embodiment, noise electromagnetic waves propagate through the first dielectric layer 2 and the second dielectric layer 4 existing between the second conductor 5 and the signal line 1. It becomes possible to suppress. In addition, it is possible to suppress the propagation of noise current through the surface of the second conductor 5 that faces the signal line 1.

  In the cable of this embodiment, the distance between the signal line 1 and the second conductor 5, the thickness and length of the first connecting member 6 (or the second connecting member 7) forming L (inductance). By adjusting the thickness and length of the strip-shaped island-shaped conductor (first conductor 3) forming the transmission line, the frequency band that becomes the band gap can be adjusted.

<Embodiment 5>
The cable of the present embodiment is based on the configuration of the first embodiment, and is provided with a fourth conductor 22 instead of the first conductor 3, the second dielectric layer 4, the first connecting member 6, and the second The difference is that the conductor 5 is not provided.

  In FIG. 11, an example of the planar shape of the 4th conductor 22 of this embodiment is shown. As shown in FIG. 11, the opening 11 is provided in the fourth conductor 22 of the present embodiment, and the second inner conductor 13 and the fourth wiring 12 are provided in the opening 11. It has been.

  The shape of the opening 11 is not limited to the illustrated square, and any shape such as a triangle, another quadrangle, a pentagon, a polygon having more vertices, or a circle can be selected. The opening 11 is repeatedly provided along the longitudinal direction of the cable, for example, periodically. However, the opening 11 may be provided over the entire length of the cable or may be provided in a partial region. Note that “periodic” is a concept including a case where some of the openings 11 are missing or the arrangement is shifted, that is, a case where the “periodic” in a strict sense is not satisfied.

  The second in-opening conductor 13 can be made of a conductive material such as copper, for example. The shape is not limited to the illustrated square, and any shape such as a triangle, another quadrangle, a pentagon, a polygon having more vertices, or a circle can be selected. The second in-opening conductor 13 may be provided in all the openings 11 as shown in the figure, but is not limited thereto, and may be provided in some of the openings 11. When the second opening inner conductors 13 are provided in some of the openings 11, it is desirable to provide them periodically (for example, every other piece). Note that “periodic” is a concept including a case where some of the second opening conductors 13 are missing or the arrangement is shifted, that is, a case where the “periodic” in a strict sense is not satisfied. is there.

  The fourth wiring 12 electrically connects the fourth conductor 22 and the second in-opening conductor 13. The fourth wiring 12 can be made of a conductive material such as copper, for example. The shape is not limited to a straight line as shown in the figure, and may be other shapes such as a curve. The fourth wiring 12 may form a spiral shape inside the opening 11.

  Note that the fourth conductor 22 formed in a shape as shown in FIG. 11 may be fixed to the position of the fourth wiring 12 and the second in-opening conductor 13 by attaching a tape or the like on one side.

  The manufacturing method of the cable of this embodiment is not particularly limited, and can be realized according to the manufacturing method described in Embodiment 1, for example.

  Next, the effect of the cable of this embodiment is demonstrated.

  In the cable of this embodiment, the signal line 1, the fourth conductor 22, the fourth wiring 12, and the second in-opening conductor 13 constitute an EBG structure. This EBG structure can be regarded as a structure in which the third conductor pattern 1A and the connection member 3A are contained in the opening provided in the first conductor pattern 2A in the EBG structure shown in FIGS. That is, the unit cell of the EBG structure included in the cable of this embodiment is the same equivalent circuit (see FIG. 5) as the unit cell of the EBG structure shown in FIGS.

  According to such a cable of this embodiment, it becomes possible to suppress the propagation of noise electromagnetic waves via the first dielectric layer 2 existing between the fourth conductor 22 and the signal line 1. In addition, it is possible to suppress the propagation of noise current through the surface of the fourth conductor 22 facing the signal line 1.

  In the cable of the present embodiment, the distance between the fourth conductor 22 and the signal line 1, the distance between the second conductor 13 in the opening and the signal line 1, and the fourth that forms L (inductance). By adjusting the thickness and length of the wiring 12, the frequency band that becomes the band gap can be adjusted.

  Note that the cable according to the present embodiment does not have the second dielectric layer 4, the first connection member 6, and the second conductor 5 as compared with the configuration according to the first embodiment, so that the weight can be reduced. Can do. Moreover, since it is not necessary to ensure the contact between the first connecting member 6 and the signal line 1, it can be manufactured relatively easily and the quality stability is also high.

<Embodiment 6>
The cable of the present embodiment is based on the configuration of the fifth embodiment, and is different in that the second in-opening conductor 13 is not provided.

  In FIG. 15, an example of the planar shape of the 4th conductor 22 of this embodiment is shown. In the cable of this embodiment, the signal line 1, the fourth conductor 22, and the fourth wiring 12 constitute an EBG structure. The unit cell of the EBG structure that the cable of this embodiment has has the same equivalent circuit diagram (see FIG. 10) as the unit cell of the EBG structure that the cable of Embodiment 4 has.

  According to such a cable of this embodiment, it becomes possible to suppress the propagation of noise electromagnetic waves via the first dielectric layer 2 existing between the fourth conductor 22 and the signal line 1. In addition, it is possible to suppress the propagation of noise current through the surface of the fourth conductor 22 facing the signal line 1.

  In the cable of the present embodiment, the band between the fourth conductor 22 and the signal line 1 and the thickness and length of the fourth wiring 12 forming L (inductance) are adjusted. The frequency band that becomes the gap can be adjusted.

  Note that the cable according to the present embodiment does not have the second dielectric layer 4, the first connection member 6, and the second conductor 5 as compared with the configuration according to the first embodiment, so that the weight can be reduced. Can do. Moreover, since it is not necessary to ensure the contact between the first connecting member 6 and the signal line 1, it can be manufactured relatively easily and the quality stability is also high.

<Embodiment 7>

  FIG. 12 is a perspective view schematically showing an example of a part of the cable of the present embodiment. FIG. 13 shows a cross-sectional view of the cable of FIG.

  As shown in FIGS. 12 and 13, the cable of the present embodiment includes a signal line 16, a third dielectric layer 17 that covers the outer periphery of the signal line 16, and a third cover that covers the outer periphery of the third dielectric layer 17. Conductor 18.

  The signal line 16 has a dielectric part 14 and a conductor part 15 covering the outer periphery thereof. The dielectric part 14 is formed in a wire shape. Although the material of the dielectric part 14 is not specifically limited, For example, it can comprise with polyethylene, air, etc. The conductor portion 15 can be made of a conductive material such as copper. That is, the signal line 16 of the present embodiment has a configuration in which the conductor portion 15 is wound so as to cover the outer periphery of the wire-shaped dielectric portion 14. The cable of this embodiment has one signal line 16 as shown in FIGS.

  Here, an example of the planar shape of the conductor part 15 is shown in FIG. As shown in FIG. 14, the conductor portion 15 has a plurality of openings 21 arranged along the longitudinal direction of the signal line 16, that is, along the longitudinal direction of the cable, in a state of being wound so as to cover the outer periphery of the dielectric portion 14. Have. The opening 21 has a first opening conductor 20 and a third wiring 19 inside.

  The shape of the opening 21 is not limited to the illustrated square, and any shape such as a triangle, another quadrangle, a pentagon, a polygon having more vertices, or a circle can be selected. Further, the opening 21 is repeatedly provided along the longitudinal direction of the cable, for example, periodically, but may be provided over the entire length of the cable or may be provided in a partial region. Note that “periodic” is a concept including a case where some of the openings 21 are missing or the arrangement is shifted, that is, the case where “periodic” in a strict sense is not satisfied.

  The first opening conductor 20 can be made of a conductive material such as copper, for example. The shape is not limited to the illustrated square, and any shape such as a triangle, another quadrangle, a pentagon, a polygon having more vertices, or a circle can be selected. Further, the first in-opening conductor 20 may be provided in all the openings 21 as shown in the figure, but is not limited thereto, and may be provided in some of the openings 21. When the first in-opening conductors 20 are provided in some of the openings 21, it is desirable to provide them periodically (for example, every other piece). Note that “periodic” is a concept including a case where some of the first in-opening conductors 20 are missing or the arrangement is shifted, that is, the case where “periodic” in a strict sense is not satisfied. is there.

  The third wiring 19 electrically connects the conductor portion 15 and the first in-opening conductor 20. The third wiring 19 can be made of a conductive material such as copper, for example. The shape is not limited to a straight line as shown in the figure, and may be other shapes such as a curve. The third wiring 19 may form a spiral shape inside the opening 21.

  The conductor part 15 formed in the shape as shown in FIG. 14 may be fixed to the position of the third wiring 19 and the first in-opening conductor 20 by attaching a tape or the like on one side.

  In the cable of the present embodiment, the conductor portion 15 and the third conductor 18 face each other with the third dielectric layer 17 interposed therebetween.

  The third dielectric layer 17 can have the same configuration as the first dielectric layer 2 covering the outer periphery of the signal line 1 described in the first embodiment. The third conductor 18 can have the same configuration as the second conductor 5 covering the outer periphery of the second dielectric layer described in the first embodiment. Therefore, these descriptions are omitted.

  The manufacturing method of the cable according to the present embodiment is not particularly limited, and can be realized by applying the manufacturing method described in the first embodiment and the conventional technique, for example.

  Next, the effect of the cable of this embodiment is demonstrated.

  In the cable of the present embodiment, the conductor portion 15 of the signal line 16, the third conductor 18, the third wiring 19, and the first in-opening conductor 20 constitute an EBG structure. Similar to the fifth embodiment, this EBG structure has a structure in which the third conductor pattern 1A and the connecting member 3A are contained in the opening provided in the first conductor pattern 2A in the EBG structure shown in FIGS. Can be considered. That is, the unit cell of the EBG structure included in the cable of the present embodiment is the same equivalent circuit as the unit cell of the EBG structure shown in FIGS.

  According to such a cable of this embodiment, it is possible to suppress the propagation of noise electromagnetic waves via the third dielectric layer 17 existing between the conductor portion 15 of the signal line 16 and the third conductor 18. It becomes possible. In addition, propagation of noise current through the surface of the third conductor 18 facing the signal line 16 can be suppressed.

  In the cable of the present embodiment, the distance between the first conductor portion 15 and the third conductor 18, the distance between the first opening conductor 20 and the third conductor 18, and L (inductance) are formed. By adjusting the thickness and length of the third wiring 19 that is provided, the frequency band that becomes the band gap can be adjusted.

In addition, since the cable of this embodiment does not have the 1st connection member 6 and the 2nd connection member 7, weight reduction is realizable. Further, since it is not necessary to ensure contact between the first connecting member 6 or the second connecting member 7 and the conductor portion 15 or the third conductor 18 of the signal line 16, it is compared with the cables of the first to fourth embodiments. In addition to being relatively easy to manufacture, quality stability is also high.
<Eighth embodiment>
The cable of the present embodiment is based on the configuration of the seventh embodiment, and is different in that the first in-opening conductor 20 is not provided.

  In FIG. 16, an example of the planar shape of the 1st conductor part 15 of this embodiment is shown. In the cable of this embodiment, the conductor portion 15 of the signal line 16, the third conductor 18, and the third wiring 19 constitute an EBG structure. The unit cell of the EBG structure that the cable of this embodiment has has the same equivalent circuit diagram (see FIG. 10) as the unit cell of the EBG structure that the cable of Embodiment 4 has.

  According to such a cable of this embodiment, it is possible to suppress the propagation of noise electromagnetic waves via the third dielectric layer 17 existing between the conductor portion 15 of the signal line 16 and the third conductor 18. It becomes possible. In addition, propagation of noise current through the surface of the third conductor 18 facing the signal line 16 can be suppressed.

  In the cable of the present embodiment, by adjusting the distance between the first conductor portion 15 and the third conductor 18, the thickness and length of the third wiring 19 forming L (inductance), etc., The frequency band that becomes the band gap can be adjusted.

  In addition, since the cable of this embodiment does not have the 1st connection member 6 and the 2nd connection member 7, weight reduction is realizable. Further, since it is not necessary to ensure contact between the first connecting member 6 or the second connecting member 7 and the conductor portion 15 or the third conductor 18 of the signal line 16, it is compared with the cables of the first to fourth embodiments. In addition to being relatively easy to manufacture, quality stability is also high.

<Ninth Embodiment>
The cable according to the present embodiment is based on the configuration of any one of the first to fourth embodiments, and is different in that only one island-shaped conductor included in the first conductor 3 is provided.

  Also in the cable of this embodiment, the same operational effects as those of Embodiments 1 to 4 can be realized.

<Embodiment 10>
The cable of the present embodiment is based on the configuration of the fifth or sixth embodiment, and is different in that only one opening 11 provided in the fourth conductor 22 is provided.

  Also in the cable of this embodiment, the same effects as those of Embodiment 5 or 6 can be realized.

<Embodiment 11>
The cable of the present embodiment is based on the configuration of the seventh or eighth embodiment, and is different in that only one opening 21 provided in the conductor portion 15 is provided.

  Also in the cable of this embodiment, the same effects as those of Embodiment 7 or 8 can be realized.

DESCRIPTION OF SYMBOLS 1 Signal line 2 1st dielectric layer 3 1st conductor 4 2nd dielectric layer 5 2nd conductor 6 1st connection member 7 2nd connection member 8 Opening 9 1st wiring 10 2nd Wiring 11 Opening 12 Fourth Wiring 13 Second Opening Conductor 14 Dielectric Part 15 Conducting Part 16 Signal Line 17 Third Dielectric Layer 18 Third Conductor 19 Third Wiring 20 First Opening Conductor 21 Opening 22 4th conductor 1A 3rd conductor pattern 2A 1st conductor pattern 3A Connection member 4A 2nd conductor pattern A Unit cell

Claims (16)

A signal line;
A first dielectric layer covering an outer periphery of the signal line;
A first conductor having an island-like conductor that partially covers the outer periphery of the first dielectric layer;
A second dielectric layer covering the outer periphery of the first conductor;
A second conductor covering the outer periphery of the second dielectric layer;
Having cable. The cable according to claim 1,
The first conductor is a cable in which a plurality of island-shaped conductors are repeatedly provided along the longitudinal direction of the cable. The cable according to claim 1 or 2,
A cable having a first connecting member for electrically connecting the second conductor and the island-shaped conductor in the second dielectric layer. The cable according to claim 3,
The island-shaped conductor is formed in a strip shape, is electrically connected to the first connecting member at one end side, and circulates around the outer periphery of the first dielectric layer. The cable according to claim 3,
An opening is provided in the island-shaped conductor, and one end of the opening is electrically connected to the island-shaped conductor, and the other end is electrically connected to the first connecting member. Having cable. The cable according to claim 1 or 2,
A cable having a second connecting member for electrically connecting the signal line and the island-shaped conductor in the first dielectric layer. The cable according to claim 6,
The island-shaped conductor is formed in a strip shape, is electrically connected to the second connecting member at one end side, and circulates around the outer periphery of the first dielectric layer. The cable according to claim 6,
An opening is provided in the island-shaped conductor, and one end of the island-shaped conductor is electrically connected to the island-shaped conductor, and the other end is electrically connected to the second connecting member. Having cable. The cable according to any one of claims 1 to 8,
The cable in which the signal line and the first conductor are opposed to each other with the first dielectric layer interposed therebetween. The cable according to any one of claims 1 to 9,
The cable in which the first conductor and the second conductor are opposed to each other with the second dielectric layer interposed therebetween. A signal line having a dielectric part and a conductor part covering the outer periphery thereof;
A third dielectric layer covering the outer periphery of the signal line;
A third conductor covering the outer periphery of the third dielectric layer,
The conductor portion of the signal line has an opening;
Inside the opening,
A cable having a third wiring electrically connected to the conductor through one end side. The cable according to claim 11,
Inside the opening, there is a first conductor in the opening,
The other end of the third wiring is a cable electrically connected to the first opening conductor. The cable according to claim 11 or 12,
A plurality of the openings are provided along the longitudinal direction of the signal line. The cable according to any one of claims 11 to 13,
The cable in which the conductor portion and the third conductor are opposed to each other with the third dielectric layer interposed therebetween. A signal line;
A first dielectric layer covering an outer periphery of the signal line;
A fourth conductor covering an outer periphery of the first dielectric layer and having an opening;
Have
Inside the opening of the fourth conductor,
A cable having a fourth wiring electrically connected to the fourth conductor via one end side. The cable according to claim 15,
Inside the opening, there is a second conductor in the opening,
The other end of the fourth wiring is a cable that is electrically connected to the second in-opening conductor.

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