JP2005184724A - Filter element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase inductance while avoiding the expansion of a filter element which is configured by winding a band-like conductor around a band-like insulator while overlapping them with each other. <P>SOLUTION: This filter element comprises: a coil section 5D formed by winding signaling band-like conductors 9a, 9b ground band-like conductors 8a, 8b which are provided side by side, and grounding band-like conductors 8a, 8b which are disposed while facing the signaling band-like conductors 9a, 9b, around a band-like insulator 7b; an input terminal 2a and a lead wire 11 which are connected to the signaling band-like conductors 9a, 9b and pulled outside; an output terminal 3a which is connected the signaling band-like conductor 9a and pulled outside; a lead wire 12 which is connected to the signaling band-like conductor 9b and pulled outside; a lead wire 15 which is connected to the grounding band-like conductor 8a and pulled outside; a lead wire 16 which is connected to the grounding band-like conductor 8b and pulled outside; and a grounding terminal 4a which is connected to the grounding band-like conductor 8b and pulled outside, wherein the lead wires 11, 12 and the lead wires 15, 16 being connected with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filter element formed by winding a strip-shaped conductor on a strip-shaped insulator.

As this type of filter element, a filter element disclosed in Japanese Patent No. 2826320 is known. This filter element is formed by winding a plurality of strip conductors (conductive and ground strip conductors) around a magnetic or non-magnetic winding frame or air core via a high dielectric constant dielectric sheet. It functions as a three-terminal type noise filter (normal mode type noise filter). In this filter element, an inductance is formed between a pair of leads connected to the winding start portion and the winding end portion of the energizing strip conductor, and the entire length of the energizing strip conductor is covered with the ground strip conductor. Capacitance is formed in a distributed constant with the body. Further, in this filter element, a pair of leads and a grounding lead are disposed at specific positions. Therefore, this filter element can realize excellent attenuation characteristics over a wide frequency band.
Japanese Patent No. 2826320 (page 3-4)

  By the way, in this kind of filter element, it is known that the attenuation characteristic can be improved by increasing the inductance of the strip-shaped conductor for energization. Further, in order to increase the inductance of the strip-shaped conductor for energization, there are a method of increasing the number of windings of the strip-shaped conductor and a method of using a magnetic winding frame (magnetic core) formed of a material with high magnetic permeability. In the latter method, since there is an upper limit in the magnetic permeability of the magnetic material, there is also an upper limit in the inductance that can be set. Therefore, it is also known that the former method is more preferable. However, in the above-described conventional filter element, in order to increase the number of turns of the conductive strip-shaped conductor, it is necessary to increase the length of the strip-shaped conductor, and accordingly, the diameter increases and the size increases. There is a problem to be solved.

  The present invention has been made to solve the above-described problems, and has as its main object to provide a filter element that can increase the inductance while avoiding an increase in size.

  In order to achieve the above object, the filter element according to claim 1 is provided with n (n is a natural number of 2 or more) arranged side by side in the width direction of the strip insulator on one surface side of the strip insulator. And n grounding strip conductors disposed on the other surface side of the strip insulator so as to face the signal strip conductors with the strip insulator interposed therebetween. A coil portion formed as a whole by winding, and one input terminal connected to one end side of each of the signal strip conductors and drawn out of the coil portion, and (n− 1) Connected to the other end side of one signal strip conductor among the first lead wires and one of the signal strip conductors to which the first lead wire is connected. One output terminal drawn out to the outside and each of the signal strips (N-1) connected to the other end side of all the other signal strip conductors except for the signal strip conductor to which the output terminal of the body is connected (n-1) A second lead wire and a third lead wire connected to one end of each of the ground strip conductors (n-1) of the ground strip conductors and led out of the coil section. Connected to the other end side of all other grounding strip conductors except one grounding strip conductor to which the third leader of the grounding strip conductors is connected. And a fourth lead wire drawn out of the coil portion and a grounding terminal connected to at least one of the grounding strip conductors and drawn out of the coil portion. The first leader line and the second leader line are connected one-to-one. It said third lead line and the fourth lead lines are connected in one-to-one. Here, the “strip-shaped conductor” in this specification is not limited to a sheet-shaped conductor having a small thickness, but a conductor having a certain thickness, for example, a cross-sectional shape is round, oval, square, or trapezoid. It is meant to include a formed plate-like conductor having flexibility.

  Further, the filter element according to claim 2 is the filter element according to claim 1, wherein the signal strip conductors are adjacent to each other, and the ground strip conductors are adjacent to each other. Has been.

  The filter element according to claim 3 is the filter element according to claim 1 or 2, wherein the coil portion is wound so that the grounding strip-shaped conductor is outside the signal strip-shaped conductor. In addition, a gap is formed in the central portion, and includes either a columnar core attached to the gap or a pot core attached to the coil portion, and the input terminal is provided on an outer peripheral portion of the signal strip conductor. The output terminal is connected to the inner peripheral part of the signal strip-shaped conductor and is opposite to the extraction part of the input terminal across the gap. The grounding terminal is connected to the outer peripheral part of the grounding strip-shaped conductor and the input terminal is pulled across the output part of the output terminal. It is drawn from the outer peripheral side portion of the coil portion located on the opposite side of the site to.

  According to a fourth aspect of the present invention, in the filter element according to the first or second aspect, the coil portion is wound so that the grounding strip conductor is located inside the signal strip conductor. And a hollow core is formed in the central portion, and includes either a columnar core attached to the air gap or a pot core attached to the coil portion, and the input terminal is an inner peripheral portion of the signal strip conductor And the grounding terminal is connected to the inner peripheral portion of the grounding strip-shaped conductor, and is connected to the inner peripheral portion of the grounding strip-like conductor and the lead-out portion of the input terminal across the gap. Is pulled out from the inner peripheral part of the coil part located on the opposite side, and the output terminal is connected to the outer peripheral part of the signal strip conductor and the input terminal across the lead part of the grounding terminal of It is drawn from the outer peripheral side portion of the coil portion located on the side opposite to the site out.

  According to a fifth aspect of the present invention, in the filter element according to the first or second aspect, the coil portion is wound so that the grounding strip-shaped conductor is located outside the signal strip-shaped conductor. At the same time, a gap is formed in the central part, and either an EI type or EE type core is attached to the coil part, and the input terminal is connected to the outer peripheral part of the signal strip conductor. It is pulled out from the outer peripheral part on one side defined by the core in the coil part, and the output terminal is connected to the inner peripheral part of the signal strip conductor and is defined by the core in the coil part. The grounding terminal is connected to the outer peripheral part of the grounding strip-shaped conductor and from the outer peripheral part on the other side of the coil part. It has been issued come.

  The filter element according to claim 6 is the filter element according to claim 1 or 2, wherein the coil portion is wound so that the grounding strip-shaped conductor is located inside the signal strip-shaped conductor. At the same time, a gap is formed in the central part, and either the EI type or EE type core is attached to the coil part, and the input terminal is connected to the inner peripheral part of the signal strip conductor. In addition, the coil portion is pulled out from an inner peripheral portion of one side defined by the core, and the grounding terminal is connected to the inner peripheral portion of the grounding strip-shaped conductor and the core in the coil portion The output terminal is connected to the outer peripheral portion of the signal strip-shaped conductor and from the outer peripheral portion on the other side of the coil portion. It has been issued come.

  Further, in the filter element according to claim 7, n (n is an n is arranged in parallel with each other in the width direction of the strip insulator in one half region along the width direction on one surface side of the strip insulator. Two or more natural numbers) the first signal strip conductors and the other half region along the width direction on the one surface side of the strip insulators separated from each other in the width direction of the strip insulators. The n second signal strip conductors arranged in parallel and the first signal strip conductors in the half region corresponding to the one half region on the other surface side of the strip insulator. In each of the n first grounding strip conductors arranged in such a manner, and each second region in a half region corresponding to the other half region along the width direction on the other surface side of the strip insulator. N arranged so as to face the signal strip conductor The second grounding strip conductor is wound around the strip insulator, and the coil portion is formed into a cylindrical shape as a whole, and one end side of each of the first signal strip conductors. One first input terminal and (n-1) first lead wires connected to each other and drawn to the outside of the coil section, and the first lead wires connected to the first lead wire. A first output terminal connected to the other end of one of the first signal strip conductors and drawn out of the coil section; and each of the first strip conductors Are connected to the other end side of all the other first signal strip conductors except the first signal strip conductor to which the first output terminal is connected. (N-1) second lead wires drawn to the outside of the coil section, and the second signal strip conductors. One second input terminal and (n−1) third lead wires connected to one end side of the body and drawn to the outside of the coil section, and the third lead wire are connected. A second output terminal connected to the other end of one second signal strip conductor of each of the second signal strip conductors and drawn out of the coil section; The other end side of all the second signal strip conductors other than the second signal strip conductor to which the second output terminal is connected among the second signal strip conductors. And (n−1) fourth lead wires that are respectively connected to the coil portion and led out of the coil portion, and (n−1) first of the first grounding strip conductors. A fifth lead wire connected to one end side of each of the grounding strip conductors and drawn out of the coil portion, and each of the first contacts. Of the ground strip conductors, each of the other ground conductors except for the first ground strip conductor to which the fifth lead wire is connected is connected to the other end side of each first ground strip conductor. And a first lead wire drawn out of the coil portion and one end side of each of the (n−1) second grounding strip conductors of the second grounding strip conductors, respectively. A seventh lead wire connected to the seventh lead wire connected to the outside of the coil portion and the seventh lead wire of the second ground wire conductors is connected. An eighth lead line connected to the other end of each of the other second grounding strip conductors other than the conductor and led out of the coil section; and each of the first grounding strip conductors A grounding end drawn out of the coil portion for grounding the body and each of the second grounding strip conductors The first leader line and the second leader line are connected one-to-one, the third leader line and the fourth leader line are connected one-to-one, and the fifth leader line The sixth leader line is connected on a one-to-one basis, and the seventh leader line and the eighth leader line are connected on a one-to-one basis.

  The filter element according to claim 8 is the filter element according to claim 7, wherein the first signal strip conductors are adjacent to each other, and the second signal strip conductors are Adjacent ones are connected, the first grounding strip conductors are connected to each other, and the second grounding strip conductors are connected to each other.

  The filter element according to claim 9 is the filter element according to claim 7 or 8, wherein the coil portion is arranged such that each of the grounding strip conductors is outside of each of the signal strip conductors. A space is formed at the center portion as being wound, and includes any one of a columnar core mounted in the space and a pot core mounted in the coil portion, and the first and second input terminals are respectively The first and second output terminals are connected to the outer peripheral portion of each signal strip conductor and drawn from the outer peripheral portion of the coil portion, respectively. And the grounding terminal is pulled out from the inner peripheral side portion of the coil portion located on the opposite side of the drawing portion of each input terminal across the gap. On the outer periphery It is drawn from the outer peripheral side portion of the coil portion located on the opposite side of the drawer part of the respective input terminals across the drawer portion of the respective output terminals with the connection.

  The filter element according to claim 10 is the filter element according to claim 7 or 8, wherein the coil portion is arranged such that each of the grounding strip conductors is on the inside of each of the signal strip conductors. A space is formed at the center portion as being wound, and includes any one of a columnar core mounted in the space and a pot core mounted in the coil portion, and the first and second input terminals are respectively Connected to the inner periphery of each signal strip conductor and pulled out from the inner peripheral portion of the coil section, and the grounding terminal is connected to the inner periphery of each ground strip conductor The first output terminal and the second output terminal are respectively drawn from the inner peripheral portion of the coil portion that is located on the opposite side of the lead portion of the input terminal across the gap. The outer periphery of the body The drawer part of the respective input terminals across the drawer portion of the ground terminal is connected are led out from the outer peripheral side portion of the coil portion located on the opposite side.

  The filter element according to claim 11 is the filter element according to claim 7 or 8, wherein the coil portion is arranged such that each of the grounding strip conductors is outside of each of the signal strip conductors. The coil portion is wound and an air gap is formed in the center portion, and either one of an EI type core and an EE type core is attached to the coil portion, and the first and second input terminals are respectively for the respective signals. The first and second output terminals are connected to the outer peripheral portion of the strip-shaped conductor and drawn out from the outer peripheral portion on one side defined by the core in the coil portion, respectively. Connected to the inner peripheral portion of the conductor and pulled out from the inner peripheral portion of the other side of the coil section defined by the core, the grounding terminal is connected to the outer peripheral portion of each grounding strip-shaped conductor It is drawn from the outer peripheral side portion of the other side of the coil portion while being continued.

  The filter element according to claim 12 is the filter element according to claim 7 or 8, wherein the coil portion is arranged such that each of the grounding strip conductors is on the inner side of each of the signal strip conductors. The coil portion is wound and an air gap is formed in the center portion, and either one of an EI type core and an EE type core is attached to the coil portion, and the first and second input terminals are respectively for the respective signals. Connected to the inner peripheral portion of the strip-shaped conductor and pulled out from the inner peripheral portion of one side defined by the core in the coil portion, the grounding terminal is connected to the inner periphery of each ground strip-shaped conductor. And the first and second output terminals are respectively outer peripheries of the signal strip-shaped conductors. Part It is drawn from the outer peripheral side portion of the other side of the coil portion while being continued.

  According to the filter element of claim 1, n signal strip conductors are arranged in parallel on the one surface side of the strip insulator so as to be spaced apart from each other in the width direction of the strip insulator. The (n-1) first lead wires connected to one end of the wire and the (n-1) second lead wires connected to the other end are connected in a one-to-one relationship, thereby forming a band-like insulator. In addition, in the state where the number of turns of each signal strip conductor is defined to be the same as the conventional one, the number of turns of the entire signal strip conductor can be increased substantially n times, so that the inductance of the signal strip conductor can be increased. Can be increased (n × n) times. Further, n ground strip conductors are arranged in parallel so as to face each signal strip conductor on the other surface side of the strip insulator, and connected to one end side of each ground strip conductor (n− 1) By connecting the third leader line and the (n-1) fourth leader line connected to the other end in a one-to-one relationship, the opposing signal strip conductor and ground strip conductor The body can be capacitively coupled to the body in good condition. Therefore, it is possible to realize a normal mode filter element having excellent noise attenuation characteristics while avoiding an increase in diameter (that is, an increase in size).

  According to the filter element of claim 2, when connecting each signal strip conductor and each ground strip conductor, adjacent signal strip conductors are connected by connecting adjacent ones to each other. Since the potential difference between them can be minimized, adjacent signal strip conductors can be brought close to the limit. Therefore, the overall width of each signal strip conductor and the overall width of each ground strip conductor can be reduced, so that a narrower normal mode filter element can be realized. .

  According to the filter element of the third aspect, the coil portion is formed by winding the signal strip conductor so that the ground strip conductor is outside, and the columnar core is formed in the gap of the coil portion. By mounting or attaching a pot core to the coil part and defining each extraction part of the input terminal, output terminal and grounding terminal, it is possible to ensure a large attenuation in a predetermined frequency band, A filter element for normal mode having a more excellent attenuation characteristic can be realized.

  According to the filter element of the fourth aspect, the coil portion is formed by winding the signal strip conductor so that the ground strip conductor is inside, and the columnar core is formed in the gap of the coil portion. By mounting or attaching a pot core to the coil part and defining each extraction part of the input terminal, output terminal and grounding terminal, it is possible to ensure a large attenuation in a predetermined frequency band, A filter element for normal mode having a more excellent attenuation characteristic can be realized.

  Further, according to the filter element of the fifth aspect, the coil portion is formed by winding the signal strip conductor so that the ground strip conductor is on the outside, and the coil portion is formed on the coil portion. By attaching a mold core, while ensuring a large amount of attenuation in a predetermined frequency band, it gives freedom to the arrangement of the lead-out parts of the input terminal, output terminal, and ground terminal within a limited range. In addition, a normal mode filter element can be realized.

  According to the filter element of the sixth aspect, the coil portion is formed by winding the signal strip conductor so that the ground strip conductor is inside, and the coil portion is formed with the EI core or the EE. By attaching a mold core, while ensuring a large amount of attenuation in a predetermined frequency band, it gives freedom to the arrangement of the lead-out parts of the input terminal, output terminal, and ground terminal within a limited range. In addition, a normal mode filter element can be realized.

  According to the filter element of the seventh aspect, the n first signal strip conductors are arranged in parallel in one half region along the width direction on the one surface side of the strip insulator, In the other half region along the width direction on one surface side, n second signal strip conductors are juxtaposed, and each first signal strip conductor is disposed on the other surface side of the strip insulator. N first grounding strip conductors are arranged so as to face each other, and n second grounding strip conductors are arranged so as to face each second signal strip conductor. And (n-1) first leader lines connected to one end side of each first signal strip conductor and (n-1) second leader lines connected to the other end side. Are connected to one end side of each second signal strip conductor and connected to the (n-1) third lead wires and the other end side. In the state where the number of turns of the strip-shaped insulator and each signal strip-shaped conductor is defined to be the same as that of the prior art by connecting the (n-1) fourth lead wires on a one-to-one basis, Since the number of turns of the entire two signal strip conductors can be increased substantially n times, the inductance of these signal strip conductors can be increased (n × n) times. In addition, n first grounding strip conductors are arranged in parallel so as to face the first signal strip conductors on the other surface side of the strip insulator, and each second signal strip conductor is provided. N second grounding conductors arranged in parallel so as to face the body, and (n-1) fifth lead wires connected to one end side of each first grounding conductor, The (n-1) sixth lead wires connected to the other end side are connected one-to-one, and (n-1) number of (n-1) th lead wires connected to one end side of each second grounding strip conductor. 7 lead wires and the (n-1) eighth lead wires connected to the other end side are connected in a one-to-one relationship, so that the first signal strip conductor and the first ground strip facing each other are connected. It is possible to capacitively couple the conductor and the opposing second signal strip conductor and second ground strip conductor in good condition. Therefore, a common mode filter element having excellent noise attenuation characteristics can be realized while avoiding an increase in diameter (that is, an increase in size).

  According to the filter element of claim 8, each first signal strip conductor, each second signal strip conductor, each first ground strip conductor, and each second ground strip When each conductor is connected, by connecting adjacent ones, the potential difference between the adjacent first signal strip conductors and between the adjacent second signal strip conductors can be minimized. Therefore, the adjacent first signal strip conductors and the adjacent second signal strip conductors can be brought close to each other. Therefore, the overall width of each of the first and second signal strip conductors and the overall width of each ground strip conductor can be reduced, resulting in a narrower common mode filter element. Can be realized.

  According to the filter element of the ninth aspect, the coil portion is wound by winding the first and second signal strip conductors so that the first and second ground strip conductors are outside. Forming and mounting a columnar core in the gap of the coil portion, or mounting a pot core on the coil portion, the first and second input terminals, the first and second output terminals, and the grounding terminal By defining the arrangement of each extraction part, a large amount of attenuation can be secured in a predetermined frequency band, and as a result, a common mode filter element having more excellent attenuation characteristics can be realized.

  According to the filter element of the tenth aspect, the coil portion is wound by winding the first and second signal strip conductors so that the first and second ground strip conductors are inside. Forming and mounting a columnar core in the gap of the coil portion, or mounting a pot core on the coil portion, the first and second input terminals, the first and second output terminals, and the grounding terminal By defining the arrangement of each extraction part, a large amount of attenuation can be secured in a predetermined frequency band, and as a result, a common mode filter element having more excellent attenuation characteristics can be realized.

  According to the filter element of the eleventh aspect, the coil portion is wound by winding the first and second signal strip conductors so that the first and second ground strip conductors are outside. By forming and attaching an EI type core or an EE type core to this coil part, the first and second input terminals within a limited fixed range while securing a large amount of attenuation in a predetermined frequency band, It is possible to realize a common mode filter element having a degree of freedom in the arrangement of the lead portions of the first and second output terminals and the ground terminal.

  According to the filter element of the twelfth aspect, the coil portion is wound by winding the first and second signal strip conductors so that the first and second ground strip conductors are inside. By forming and attaching an EI type core or an EE type core to this coil part, the first and second input terminals within a limited fixed range while securing a large amount of attenuation in a predetermined frequency band, It is possible to realize a common mode filter element having a degree of freedom in the arrangement of the lead portions of the first and second output terminals and the ground terminal.

  Hereinafter, a filter element according to the present invention will be described with reference to the accompanying drawings.

  First, the filter element 1 will be described with reference to the drawings.

  As shown in FIG. 1, the filter element 1 includes a plurality of input terminals (first input terminal in the present invention) 2a and an input terminal (second input terminal in the present invention) 2b (hereinafter referred to as two examples). When not particularly distinguished, they are also referred to as “input terminals 2”), the same number (two) of output terminals (first output terminals in the present invention) 3a as the input terminals 2 and output terminals (second output terminals in the present invention). ) 3b (hereinafter also referred to as “output terminal 3” unless otherwise specified), the same number (two) of ground terminals (first ground terminals in the present invention) as the input terminal 2 and a ground terminal (main) 2nd grounding terminal in the invention) 4b (hereinafter also referred to as "grounding terminal 4" unless otherwise specified), coil portion 5, columnar (for example, columnar) magnetic body (magnetic core) 6, first To eighth leader lines 11 to 18, and Comprising a to fourth wiring 19 to 22, it is configured to 5 terminal type noise filter of the distributed constant type (low-pass common mode filter).

  As shown in FIGS. 3 and 4, the coil portion 5 includes, for example, two strip insulators 7 a and 7 b formed to have the same width (hereinafter also referred to as “band insulator 7” unless otherwise distinguished) 2 × n (n is a natural number of 2 or more, in this example, n = 2 as an example) grounding strip conductors 8a, 8b, 8c, 8d (hereinafter referred to as "ground strip conductor 8" unless otherwise specified) And the same number (four) of signal strip conductors 9a, 9b, 9c, 9d (hereinafter also referred to as "signal strip conductor 9" unless otherwise specified). Configured.

  Each strip insulator 7 is made of a material having dielectric properties and electrical insulation properties. Further, for example, as shown in FIG. 4, the grounding strip conductors 8 are set to have the same width and the same length, and are separated from each other in the width direction of the strip insulator 7a on the strip insulator 7a. And they are arranged in parallel in this order. Specifically, each grounding strip conductor (first grounding strip conductor in the present invention) 8a, 8b is placed in one half region B1 along the width direction of the strip insulator 7a and each grounding conductor. The strip conductors (second ground strip conductors in the present invention) 8c and 8d are arranged in parallel in the other half region B2 along the width direction of the strip insulator 7a. The strip insulator 7b is overlaid on the strip insulator 7a so as to sandwich each ground strip conductor 8 with the strip insulator 7a. For example, the signal strip conductors 9 are set to have the same width and the same length, and are separated from each other in the width direction of the strip insulator 7b on the strip insulator 7b and in parallel in this order. It is installed side by side. Specifically, each signal strip conductor (first signal strip conductor in the present invention) 9a, 9b is formed in one half region A1 along the width direction of the strip insulator 7b, and each signal strip conductor. The conductors (second signal strip conductors 9c and 9d in the present invention) are juxtaposed in the other half region A2 along the width direction of the strip insulator 7b. In this case, each of the signal strip conductors 9a to 9d is formed to have the same width as each ground strip conductor 8 as an example, and is opposed to the corresponding ground strip conductor 8a to 8d. Arranged. With the above configuration, the grounding strip conductor 8, the strip insulator 7b, and the signal strip conductors 9 are stacked (stacked) in this order on the strip insulator 7a. Therefore, in this laminated state, when the band-shaped insulator 7b is used as a reference, each signal band-shaped conductor 9 is disposed on one surface (the upper surface in FIG. 4) side and the other surface (the same figure). Each of the grounding strip-like conductors 8 is arranged on the lower surface side.

  Further, as shown in FIG. 4, an input terminal 2a is connected to one end side of the signal strip conductor 9b as the first signal strip conductor, and the other first signal strip conductor is used as the first strip conductor. A first lead wire 11 is connected to the signal strip conductor 9a. In this example, since n = 2, the number (n−1) of the other first signal strip conductors is one, and the number (n−1) of the first lead lines 11 is also the same. It becomes one. The output terminal 3a is connected to the other end of one of the first signal strip conductors (signal strip conductor 9a) to which the first lead wire 11 is connected. Further, the second lead-out is provided on the other end side of all other first signal strip conductors (in this example, the signal strip conductor 9b) except the signal strip conductor 9a to which the output terminal 3a is connected. Line 12 is connected. The input terminal 2b is connected to one end side of the signal strip conductor 9c as the second signal strip conductor, and the signal strip conductor 9d as the other second signal strip conductor is A third leader line 13 is connected. In this example, the number (n−1) of the other second signal strip conductors is one, and the number (n−1) of the third lead wires 13 is also one in the same manner. The output terminal 3b is connected to the other end of the signal strip conductor 9d as the second signal strip conductor to which the third lead line 13 is connected. A fourth lead wire 14 is provided on the other end side of all the second signal strip conductors (signal strip conductor 9c) other than the signal strip conductor 9d to which the output terminal 3b is connected. It is connected. A fifth lead is provided at one end of (n-1) first grounding strip conductors (in this example, one of the grounding strip conductors 8a) of the first grounding strip conductors. All other first grounding strip conductors other than one first grounding strip conductor to which the line 15 is connected and the fifth leader of each first grounding strip conductor is connected A sixth lead wire 16 is connected to the other end of the body (in this example, one of the grounding strip conductors 8b). Similarly, one end of (n-1) second grounding strip conductors (in this example, one of the grounding strip conductors 8d) of the second grounding strip conductors, The seventh lead wire 17 is connected, and all the other second conductors except for one second ground strip conductor to which the seventh lead wire of each second ground strip conductor is connected. An eighth lead wire 18 is connected to the other end side of the grounding strip conductor (in this example, one of the grounding strip conductors 8c). Further, as an example, ground terminals 4a and 4b are connected to one end sides of the grounding strip conductors 8b and 8c, respectively.

  The coil section 5 is configured such that the strip insulators 7, the ground strip conductors 8, and the signal strip conductors 9 that are overlapped with each other in this manner are wound around the other ends of the conductors 8 and 9. As shown in FIG. 1, as a whole, by winding the grounding strip conductor 8 for each signal strip 9 m times so that the ground strip strip conductor 8 is on the outside, It is formed in a cylindrical shape in which a gap H is formed. The magnetic core 6 is mounted in the gap H and disposed at the center of the coil portion 5.

  In this case, one end side (the outermost peripheral portion, the outermost portion of each signal strip conductor 9a, 9b, 9c, 9d to which the first lead wire 11, the input terminal 2a, the input terminal 2b, and the third lead wire 13 are respectively connected. The outer peripheral portion in the present invention is located on the outer peripheral side of the coil portion 5, and the lead wires 11, 13 and the input terminals 2 are connected to one end face of the coil portion 5 (in FIG. 1). Are pulled out from the outer peripheral side part (drawing part A in FIG. 2). On the other hand, the other end side (innermost peripheral portion) of each of the signal strip conductors 9a, 9b, 9c, 9d to which the output terminal 3a, the second lead line 12, the fourth lead line 14, and the output terminal 3b are connected, respectively. The inner peripheral portion in the present invention is located on the center side of the coil portion 5, and each of the lead wires 12, 14 and each output terminal 3 is the center on one end face of the coil portion 5, as shown in FIG. It is pulled out from the (inner circumference) side part (drawing part B in FIG. 2). Here, as shown in FIG. 2, the extraction part B of each output terminal 3 or the like is a virtual plane L (hereinafter referred to as “plane L”) including the central axis O of the coil portion 5 and the extraction part A of each input terminal 2. It is set on the opposite side of the extraction part A across the central axis O (the gap H, in other words, the magnetic core 6). Further, one end side (outermost peripheral part, main part) of each grounding strip conductor 8a, 8b, 8c, 8d to which the fifth lead wire 15, each grounding terminal 4a, 4b, and the seventh lead wire 17 are respectively connected. The outer peripheral portion in the invention is located on the outer peripheral side of the coil portion 5, and the lead wires 15, 17 and the grounding terminals 4 are arranged on the outer peripheral side portion (one end face of the coil portion 5 as shown in FIG. 1). It is pulled out from the drawer part C) in FIG. Specifically, as shown in FIG. 2, the lead portion C of each grounding terminal 4 or the like is set on the plane L and at a position opposite to the lead portion A across the lead portion B. Yes. Here, the “drawer part” of the input terminal 2 or the like in the present invention refers to a part on the surface of the coil part 5 where the input terminal 2 or the like protrudes from the coil part 5. On the other hand, the other end side of each grounding strip conductor 8a, 8d and the other end side of each grounding strip conductor 8b, 8c to which the sixth lead wire 16 and the eighth lead wire 18 are respectively connected (the outermost side). The inner peripheral part, the inner peripheral part in the present invention, is located on the center side of the coil part 5, and each lead wire 16, 18 is the center (inner part) on one end face of the coil part 5 as shown in FIG. 1. It is pulled out from the peripheral part.

  As shown in FIGS. 1 and 4, the first lead line 11 and the second lead line 12 are one-to-one by the first wiring 19, and the third lead line 13 and the fourth lead line 14 are The second wiring 20 is connected one-to-one on one end face of the coil portion 5. Similarly, the fifth leader line 15 and the sixth leader line 16 are in a one-to-one relationship by the third wiring 21, and the seventh leader line 17 and the eighth leader line 18 are in a pair by the fourth wiring 22. And one end face of the coil part 5 is connected. With this configuration, the signal strip conductors 9b and 9a are connected in series via the lead wires 12 and 11 and the first wiring 19 between the input terminal 2a and the output terminal 3a. Yes. Further, between the input terminal 2 b and the output terminal 3 b, the signal strip conductors 9 c and 9 d are connected in series via the lead wires 14 and 13 and the second wiring 20. In addition, the grounding strip conductors 8 a and 8 b are connected in series via the sixth lead wire 16, the third wire 21, and the fifth lead wire 15. The grounding strip conductors 8 c and 8 d are connected in series via the eighth lead wire 18, the fourth wire 22, and the seventh lead wire 17. On the other hand, the grounding terminal 4a is connected to one end of the grounding strip conductor 8b. The grounding terminal 4b is connected to one end of the grounding strip conductor 8c.

  In this filter element 1, the signal strip conductors 9 a and 9 b are connected to the longitudinal direction of the strip insulator 7 between the input terminal 2 a and the output terminal 3 a via two lead wires 11 and 12 and one wiring 19. It is configured to be connected in series in a folded state along the direction, and the direction of the current flowing through each of the signal strip conductors 9a and 9b is the same direction. Similarly, each of the signal strip conductors 9c and 9d extends in the longitudinal direction of the strip insulator 7 between the input terminal 2b and the output terminal 3b via the two lead wires 13 and 14 and the single wiring 20. It is configured to be connected in series in a state of being folded along, and the direction of the current flowing through each of the signal strip conductors 9c and 9d is the same direction. Therefore, the diameter is the same as that of the conventional filter element in which one signal strip conductor 9 is disposed between each input terminal 2 and each output terminal 3 (avoids an increase in diameter). However, the length of each signal strip conductor 9 disposed between each input terminal 2 and each output terminal 3 is doubled, and the number of turns of each signal strip conductor 9 is Substantially double (2 × m). For this reason, the inductance of each signal strip | belt-shaped conductor 9 between each input terminal 2 and each output terminal 3 can be increased 4 times, respectively. Therefore, the lead portions A, B, C of the input terminals 2, the output terminals 3, and the ground terminals 4 are defined at the positions described above, and the signal strip conductors 9, the ground strip conductors 8, Are coupled to each other in a good state and coupled in a capacitive manner, while having the same diameter as that of a conventional filter element (that is, avoiding an increase in diameter (that is, an increase in size)). ), The common mode filter element 1 having excellent noise attenuation characteristics can be realized.

  The present invention is not limited to the configuration described above. For example, in the above configuration, the grounding terminals 4a and 4b are connected to the respective one ends of the grounding strip conductors 8b and 8c, respectively, so that the grounding strip conductors 8a, 8b, 8c, and 8d are grounded. However, one of the grounding terminals 4a and 4b can be omitted by short-circuiting one end of each grounding strip conductor 8b and 8c in the coil portion 5. Further, for example, in the filter element 1 described above, the coil portions 5 are formed by winding the ground strip conductors 8 around the signal strip conductors 9 so as to be outside, and the input terminals 2, The example in which the lead portions A, B, and C of the output terminals 3 and the grounding terminals 4 are defined as shown in FIG. 2 has been described. However, as in the filter element 1A shown in FIG. The lead-out portions A, B, and C of the output terminal 3 and each grounding terminal 4 can be defined and configured as shown in FIG. In this filter element 1A, as shown in FIG. 7, the coil portion 5A has a state in which the strip-shaped insulator 7b, each signal strip-shaped conductor 9, the strip-shaped insulator 7a and each ground strip-shaped conductor 8 are stacked in this order. Thus, these are wound from the right end side in the figure so that each grounding strip conductor 8 is inside each signal strip conductor 9. In this case, each input terminal 2 is connected to the inner peripheral portion of each signal strip conductor 9 and is drawn out from the inner peripheral portion of the coil portion 5A. Each grounding terminal 4 is connected to the inner peripheral part of each grounding strip-shaped conductor 8 and has an inner peripheral side of a coil part 5A located on the opposite side to the lead-out part A of each input terminal 2 with a gap H interposed therebetween. It is drawn from each part. Each output terminal 3 is connected to the outer peripheral portion of each signal strip conductor 9 and is a coil portion located on the opposite side of the lead portion A of each input terminal 2 across the lead portion C of each ground terminal 4. It is pulled out from the outer peripheral side part of 5A. In addition, about the component same as the filter element 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. In the filter element 1A, similarly to the filter element 1, the inductance of the signal strip conductor 9 between each input terminal 2 and each output terminal 3 can be increased four times. Therefore, the lead portions A, B, and C of the input terminals 2, the output terminals 3, and the ground terminals 4 are defined at the positions shown in FIG. 6 and the signal strip conductors 9 and the ground strips are formed. The common mode filter element 1 having excellent noise attenuation characteristics while having the same diameter as that of the conventional filter element can be realized in combination with the arrangement of the conductor 8 facing each other. . In each filter element 1, 1 </ b> A described above, a so-called pot core can be used instead of the columnar magnetic core 6.

  Further, unlike the filter elements 1 and 1A described above, an EI type core or an EE type core (same as the filter elements 1B and 1C shown in FIGS. Then, an EI type core) 6A can be used as an example. In this case, in the filter element 1 </ b> B shown in FIG. 8, the coil part 5 </ b> B has the same configuration as the coil part 5 of the filter element 1, and each grounding strip conductor 8 is outside the signal strip conductor 9. It is formed by winding so that In addition, each input terminal 2, each output terminal 3, and each grounding terminal 4 can be drawn out from a part different from the filter element 1. Specifically, each input terminal 2 connected to the outer periphery of each signal strip conductor 9 is connected to one side (same as that shown in FIG. 8) divided by the EI core 6A in the coil portion 5B. It can be pulled out from an arbitrary position on the outer peripheral side portion (left side in the figure). In the same figure, each input terminal 2 is each pulled out from the extraction | drawer site | part A as an example. Also, each output terminal 3 connected to the inner periphery of each signal strip conductor 9 is, as shown in the figure, the other side (in FIG. It can be pulled out from an arbitrary position on the inner peripheral side part on the right side). In the same figure, each output terminal 3 is each pulled out from the drawer | drawing-out site | part B as an example. Further, each grounding terminal 4 connected to the outer peripheral part of each grounding strip conductor 8 also has an arbitrary outer peripheral part on the other side (right side in the same figure) of the coil part 5B, as shown in FIG. It can be pulled out from the position. In the figure, each grounding terminal 4 is drawn out from the lead-out part C as an example. In addition, although each lead-out line 11-18 is connected by one-to-one by each wiring 19-22 like the filter element 1, in order to make an understanding of description easy, in FIG. 19 to 22 are omitted.

  On the other hand, in the filter element 1C shown in FIG. 9, the coil portion 5C has the same configuration as the coil portion 5A of the filter element 1A, and each grounding strip conductor 8 is located on the inner side with respect to each signal strip conductor 9. It is formed so as to be wound. Moreover, each input terminal 2, each output terminal 3, and each grounding terminal 4 can be pulled out from a site different from the filter element 1A. Specifically, each input terminal 2 connected to the inner periphery of each signal strip conductor 9 is, as shown in the figure, one side (indicated by one side of the coil portion 5C defined by the EI core 6A) ( It can be pulled out from an arbitrary position on the inner peripheral side part on the right side in FIG. In the same figure, each input terminal 2 is each pulled out from the extraction | drawer site | part A as an example. Further, each output terminal 3 connected to the outer periphery of each signal strip conductor 9 is an arbitrary part on the outer peripheral side portion on the other side (left side in the figure) partitioned by the EI type core 6A in the coil portion 5C. It can be pulled out from the position. In the same figure, each output terminal 3 is each pulled out from the drawer | drawing-out site | part B as an example. Further, each grounding terminal 4 connected to the inner peripheral portion of each grounding strip conductor 8 is pulled out from an arbitrary position on the inner peripheral side portion on the other side (left side in the figure) of the coil portion 5C. Can do. In the figure, each grounding terminal 4 is drawn out from the lead-out part C as an example. In addition, although each lead-out line 11-18 is connected by one-to-one by each wiring 19-22 like the filter element 1A, in order to understand an explanation easily, in FIG. 19 to 22 are omitted.

  In each of the filter elements 1B and 1C, by using the EI type core (or EE type core) 6A as the core material, the lead portions A, B, It is possible to increase the inductance of each signal strip conductor 9 connected between each input terminal 2 and each output terminal 4 by a factor of four while giving a certain degree of freedom in the arrangement (setting) of C. it can. Therefore, the lead portions A, B, and C of each input terminal 2, each output terminal 3, and each ground terminal 4 are defined within a predetermined range, and each signal strip conductor 9 and each ground strip conductor 8 A common mode filter element having excellent noise attenuation characteristics while having the same diameter as that of the conventional filter element can be realized.

  Further, the present invention is not limited to the configuration described above. For example, in the filter elements 1, 1 </ b> A, 1 </ b> B, and 1 </ b> C described above, a pair of input terminals 2, a pair of output terminals 3, a pair of grounding terminals 4, and first and second signal strip conductors The example in which each signal strip conductor 9 and each ground strip conductor 8 as the first and second ground strip conductors 8 are configured as a common mode filter element has been described. The filter element for normal mode can be configured by the configuration of one phase in the filter elements 1, 1A, 1B, and 1C. As an example, the filter element 1D shown in FIG. 10 can be configured by using the configuration for one phase of the filter element 1 (for example, the configuration on the half regions B1 and A1 side of the strip insulators 7a and 7b). . In this filter element 1D, as shown in FIGS. 11 and 12, the coil portion 5D includes a strip insulator 7a, grounding strip conductors 8a and 8b, strip insulator 7b, and signal strip conductors 9a and 9b. In the state of being overlapped in this order, each grounding conductor 8 is wound around from the right end side in FIG. 12 so that each grounding conductor 8 is outside. In this case, the input terminal 2a is connected to the outer peripheral portion of the signal strip-like conductor 9b and is drawn out from the outer peripheral side portion (leading portion A) of the coil portion 5D. The output terminal 3a is connected to the inner peripheral portion of the signal strip conductor 9a and is drawn out from the inner peripheral side portion (drawer portion B) of the coil portion 5D located on the opposite side of the lead portion A across the gap H. It is. The grounding terminal 4a is connected to the outer peripheral portion of the grounding strip-shaped conductor 8b and pulled out from the outer peripheral side portion (leading portion C) of the coil portion 5D located on the opposite side of the leading portion A across the lead portion B. It is. In addition, about the component same as the filter element 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. The fifth leader line 15 and the sixth leader line 16 correspond to the third leader line and the fourth leader line of the normal mode filter in the present invention, respectively. In the filter element 1D, similarly to the filter element 1, the inductance of each signal strip conductor 9 between the input terminal 2a and the output terminal 3a is increased four times. Therefore, the common mode filter element 1D having excellent noise attenuation characteristics can be realized with a diameter equivalent to that of the conventional filter element. Further, as a core material to be mounted on the coil portion 5D, a so-called pot core can be used, although not shown, instead of the columnar magnetic core 6 shown in FIG. In addition, an EI type core (or EE type core) 6A can be used as in the filter element 1E shown in FIG. In this filter element 1E, the lead-out portions A, B, C of the input terminal 2a, the output terminal 3a, and the grounding terminal 4a from the coil part 5E are made the same as the coil parts 5B, 5C in the filter elements 1B, 1C. Thus, it can be pulled out from any position within a specific range.

  Further, in each of the filter elements 1 to 1E described above, the number of the signal strip conductors 9 disposed between the input terminal 2 and the output terminal 3 is doubled as compared with the conventional filter element, and the inductance is quadrupled. Although the increased example has been described, the number of the signal strip conductors 9 disposed between the input terminal 2 and the output terminal 3 is not limited to two, and can be defined to be three or more. . Moreover, in each filter element 1-1E mentioned above, each strip | belt-shaped conductor 9 for signals or each strip | belt-shaped for grounding is used as a method of connecting the strip | belt-shaped conductors 9 for several signals, or the strip | belt-shaped conductors 8 for multiple grounding in series. While an example in which the lead wire is connected to the end portion of the conductor 8 and the lead wires are connected to each other at the end face of the coil portion has been described, the length of each lead wire is increased to By using the portion as the above-mentioned wiring, it is possible to adopt a configuration in which the leader lines are directly connected to each other. Furthermore, the length of the leader line connected to one end of each signal strip conductor 9 and each ground strip conductor 8 is further increased and the configuration is adopted in which the lead strip is connected directly to the other end. You can also. Moreover, in each filter element 1-1E mentioned above, when connecting the strip | belt-shaped conductors 9 for signals arrange | positioned between the input terminal 2 and the output terminal 3 in series, the structure which connects adjacent things is connected. By adopting the example, the potential difference between adjacent signal strip conductors can be minimized to bring the signal strip conductors close to each other as much as possible, and the overall width of each signal strip conductor can be reduced. As described above, it is possible to adopt a configuration in which signal strip conductors 9 that are not adjacent to each other are connected to each other. Moreover, in each filter element 1-1E mentioned above, the structure which pulls out all the input terminal 2, the output terminal 3, and the terminal 4 for grounding from the one end surface side of each coil part 5-5E is employ | adopted. A configuration in which any one of the output terminal 3 and the grounding terminal 4 is pulled out from the other end face side of each of the coil portions 5 to 5E can also be adopted. Similarly, it is also possible to adopt a configuration in which each leader line is drawn from both end face sides of each coil part 5 to 5E.

  Specific examples will be given to explain the present invention in detail. As an example, an example of the filter element 1B will be described.

  An insulation sheet made of polyimide, width 14 mm, thickness 50 μm, length 1350 mm is used as each band-like insulator 7, and the material is Cu, width 1.5 mm, thickness 35 μm, length 1330 mm thin metal Four plates are used as each grounding strip conductor 8, and four thin metal plates with a material of Cu, a width of 1.5 mm, a thickness of 35 μm, and a length of 1330 mm are used as each strip strip conductor 9. Then, after winding these 28 times in a stacked (overlapped) state to form the coil portion 5B, a sample of the filter element 1B was prepared by attaching the EI core 6A to the coil portion 5B, and did. Further, instead of the grounding strip conductors 8 and the signal strip conductors 9 used in the above-described embodiments, thin metal plates each having a material of Cu, a width of 3 mm, a thickness of 35 μm, and a length of 1330 mm are provided. A sample of a filter element having 28 turns was prepared by using two sheets each as a ground strip conductor and a signal strip conductor as a comparative example. Next, noise attenuation characteristics of the filter elements according to the example and the comparative example were measured. The measurement results are shown in FIG.

  According to the noise attenuation characteristic diagram shown in FIG. 14, it is understood that the filter element according to the example can improve the noise attenuation effect of about 10 dB in the frequency region of 10 MHz or less as compared with the filter element according to the comparative example.

1 is a perspective view showing a configuration of a filter element 1. FIG. FIG. 3 is a plan view of the filter element 1 as viewed from one end face in order to show the lead portions A, B, and C of the input terminal 2, the output terminal 3, and the grounding terminal 4. FIG. 2 is a perspective view of the filter element 1 in a state where one end side of each strip insulator 7, each ground strip conductor 8, and each signal strip conductor 9 is unrolled to show the configuration of the filter element 1. 3 is a perspective view showing the configuration of each strip insulator 7, each ground strip conductor 8, and each signal strip conductor 9. FIG. It is a perspective view which shows the structure of 1 A of filter elements. FIG. 3 is a plan view of the filter element 1A as viewed from one end face in order to show the lead-out portions A, B, C of the input terminal 2, the output terminal 3, and the grounding terminal 4. FIG. 3 is a perspective view showing a configuration of each strip insulator 7, each ground strip conductor 8, and each signal strip conductor 9 used in the filter element 1A. It is a perspective view which shows the structure of the filter element 1B. It is a top view which shows the structure of 1 C of filter elements. It is a perspective view which shows the structure of filter element 1D. FIG. 3 is a perspective view of the filter element 1D in a state in which one end side of each strip insulator 7, ground strip conductor 8, and signal strip conductor 9 is unrolled to show the configuration of the filter element 1D. It is a perspective view which shows the structure of each strip | belt-shaped insulator 7, each ground strip | belt-shaped conductor 8, and each signal strip | belt-shaped conductor 9 used for filter element 1D. It is a perspective view which shows the structure of the filter element 1E. It is a noise attenuation characteristic figure which shows the relationship between the frequency of the filter element 1B which concerns on an Example, and noise attenuation amount, and the relationship between the frequency of the filter element which concerns on a comparative example, and noise attenuation amount.

Explanation of symbols

1, 1A to 1E Filter elements 2a and 2b Input terminals 3a and 3b Output terminals 4a and 4b Ground terminals 5, 5A to 5E Coil sections 6 and 6A Magnetic cores 7a and 7b Strip insulators 8a to 8d Ground strip conductors 9a ~ 9d Strip conductor for signals 11-18 Leader line H Air gap

Claims (12)

N (n is a natural number of 2 or more) signal strip conductors arranged side by side in the width direction of the strip insulator on one surface side of the strip insulator, and the other of the strip insulators A coil portion formed in a cylindrical shape as a whole by winding n grounding strip conductors arranged to face each of the signal strip conductors on the surface side with the strip insulator interposed therebetween. When,
One input terminal connected to one end side of each of the signal strip conductors and led out of the coil portion and (n−1) first lead wires;
One output terminal connected to the other end of one of the signal strip conductors of the signal strip conductors to which the first lead wire is connected, and led out of the coil section; ,
Each of the signal strip conductors is connected to the other end of each of the signal strip conductors other than the signal strip conductor to which the output terminal is connected, and drawn out of the coil section. (N-1) second leader lines;
A third lead wire connected to one end side of the (n-1) grounding strip conductors of each grounding strip conductor and led out of the coil portion;
The coil portion connected to the other end side of all the grounding strip conductors other than one grounding strip conductor to which the third lead wire is connected among the grounding strip conductors. A fourth leader drawn to the outside of the
A grounding terminal connected to at least one of the grounding strip conductors and led out of the coil portion;
The first leader line and the second leader line are connected one-to-one;
A filter element in which the third leader line and the fourth leader line are connected one-to-one.   2. The filter element according to claim 1, wherein adjacent ones of the signal strip conductors are connected to each other, and adjacent ones of the ground strip conductors are connected to each other. The coil portion is wound so that the ground strip conductor is on the outside with respect to the signal strip conductor, and a gap is formed in the center portion,
The columnar core mounted in the gap, and a pot core mounted on the coil portion,
The input terminal is connected to the outer peripheral portion of the signal strip-shaped conductor and pulled out from the outer peripheral side portion of the coil portion,
The output terminal is connected to the inner peripheral portion of the signal strip conductor and is pulled out from the inner peripheral side portion of the coil portion located on the opposite side of the input terminal with the gap interposed therebetween,
The grounding terminal is connected to the outer peripheral portion of the grounding strip-shaped conductor and from the outer peripheral side portion of the coil portion located on the opposite side of the output portion of the input terminal across the lead portion of the output terminal The filter element according to claim 1 or 2, wherein the filter element is drawn out. The coil portion is wound so that the grounding strip conductor is inside the signal strip conductor, and a gap is formed in the center portion,
A columnar core mounted in the gap, and a pot core mounted on the coil part,
The input terminal is connected to the inner peripheral portion of the signal strip conductor and pulled out from the inner peripheral portion of the coil portion,
The grounding terminal is connected to the inner peripheral part of the grounding strip-shaped conductor and is drawn out from the inner peripheral side part of the coil part located on the opposite side of the input terminal from the lead part across the gap. ,
The output terminal is connected to the outer peripheral portion of the signal strip conductor and from the outer peripheral side portion of the coil portion located on the opposite side of the input terminal lead portion across the lead portion of the grounding terminal The filter element according to claim 1 or 2, wherein the filter element is drawn out. The coil portion is wound so that the ground strip conductor is on the outside with respect to the signal strip conductor, and a gap is formed in the center portion,
The coil part is fitted with either an EI type or EE type core,
The input terminal is connected to the outer peripheral portion of the signal strip conductor and is pulled out from the outer peripheral portion on one side defined by the core in the coil portion,
The output terminal is connected to the inner peripheral portion of the signal strip conductor and is pulled out from the inner peripheral portion on the other side partitioned by the core in the coil portion,
3. The filter element according to claim 1, wherein the grounding terminal is connected to an outer peripheral portion of the grounding strip-shaped conductor and pulled out from an outer peripheral side portion on the other side of the coil portion. The coil portion is wound so that the grounding strip conductor is inside the signal strip conductor, and a gap is formed in the center portion,
The coil part is fitted with either an EI type or EE type core,
The input terminal is connected to the inner peripheral portion of the signal strip-shaped conductor and pulled out from an inner peripheral side portion on one side defined by the core in the coil portion,
The grounding terminal is connected to the inner peripheral part of the grounding strip-shaped conductor and is drawn out from an inner peripheral part on the other side partitioned by the core in the coil part,
3. The filter element according to claim 1, wherein the output terminal is connected to an outer peripheral portion of the signal strip-shaped conductor and is led out from an outer peripheral side portion on the other side of the coil portion. N (n is a natural number of 2 or more) first signals arranged in parallel and spaced apart from each other in the width direction of the band insulator in one half region along the width direction on one surface side of the band insulator. The band-shaped conductor for use, and n second signals arranged in parallel and spaced apart from each other in the width direction of the band-shaped insulator in the other half region along the width direction on the one surface side of the band-shaped insulator And n number of n-th conductors arranged so as to face each of the first signal strip conductors in a half region corresponding to the one half region on the other surface side of the strip insulator. 1 in the half region corresponding to the other half region along the width direction on the other surface side of the belt-like insulator so as to face each of the second signal belt-like conductors. The n second grounding strip conductors disposed, A coil portion formed as a whole tubular by winding across the Jo insulator,
One first input terminal connected to one end side of each of the first signal strip conductors and led out of the coil section; and (n-1) first lead wires;
One of the first signal strip conductors connected to the first lead wire is connected to the other end of the first signal strip conductor and pulled out of the coil section. One first output terminal;
Of the first signal strip conductors, the other end side of all the first signal strip conductors other than the first signal strip conductor to which the first output terminal is connected. (N-1) second lead wires respectively connected and drawn out of the coil section;
One second input terminal connected to one end side of each of the second signal strip conductors and led out of the coil section; and (n-1) third lead wires;
One of the second signal strip conductors connected to the third lead wire is connected to the other end side of the second signal strip conductor and pulled out of the coil section. One second output terminal;
Of the second signal strip conductors, the second signal strip conductors other than the second signal strip conductor to which the second output terminal is connected are connected to the other ends of the second signal strip conductors. (N-1) fourth lead wires respectively connected and drawn out of the coil section;
A fifth lead wire connected to one end side of the (n-1) first grounding strip conductors of each of the first grounding strip conductors and led out of the coil portion. When,
Of the first grounding strip conductors, the other ends of all other first grounding strip conductors other than the first grounding strip conductor to which the fifth lead wire is connected. A sixth lead wire connected to each side and drawn out of the coil portion;
Seventh lead wire connected to one end side of the (n-1) second grounding strip conductors of the second grounding strip conductors and led out of the coil section. When,
Of the second grounding strip conductors, the other ends of all the second grounding strip conductors other than one second grounding strip conductor to which the seventh lead wire is connected. An eighth lead line connected to each side and drawn out of the coil part;
A grounding terminal led out of the coil portion for grounding each of the first grounding strip conductors and each of the second grounding strip conductors;
The first leader line and the second leader line are connected one-to-one;
The third leader line and the fourth leader line are connected one-to-one;
The fifth leader line and the sixth leader line are connected one-to-one;
A filter element in which the seventh leader line and the eighth leader line are connected one-to-one.   Adjacent ones of the first signal strip conductors are connected to each other, adjacent ones of the second signal strip conductors are connected to each other, and the first ground strip conductors are adjacent to each other. 8. The filter element according to claim 7, wherein ones to be connected are connected and adjacent ones of the second grounding strip conductors are connected to each other. The coil portion is wound around the signal strip conductors so that the ground strip conductors are outside, and a gap is formed in the center portion.
A columnar core mounted in the gap, and a pot core mounted on the coil part,
Each of the first and second input terminals is connected to the outer peripheral portion of each of the signal strip conductors and is drawn from the outer peripheral side portion of the coil portion,
The first and second output terminals are connected to the inner periphery of the signal strip conductors, and the coils are positioned on the opposite side of the input terminals from the input terminals with the gap interposed therebetween. Pulled out from the inner periphery of the part,
The grounding terminal is connected to the outer peripheral portion of each grounding strip-shaped conductor and has an outer periphery of the coil portion located on the opposite side of the lead-out portion of each input terminal across the lead-out portion of each output terminal The filter element according to claim 7 or 8, wherein the filter element is pulled out from a side portion. The coil portion is wound around the signal strip conductors so that the ground strip conductors are inside, and a gap is formed in the center portion.
A columnar core mounted in the gap, and a pot core mounted on the coil part,
Each of the first and second input terminals is connected to an inner peripheral portion of each of the signal strip conductors and is drawn from an inner peripheral portion of the coil portion,
The grounding terminal is connected to the inner peripheral portion of each grounding strip-shaped conductor and from the inner peripheral side portion of the coil portion located on the opposite side of the drawing portion of each input terminal across the gap. Pulled out,
The first and second output terminals are connected to the outer periphery of the signal strip conductors, respectively, and on the opposite side of the input terminals from each other, with the ground terminal lead part interposed therebetween. The filter element according to claim 7, wherein the filter element is drawn from an outer peripheral side portion of the coil portion that is positioned. The coil portion is wound around the signal strip conductors so that the ground strip conductors are outside, and a gap is formed in the center portion.
The coil part is fitted with either an EI type or EE type core,
Each of the first and second input terminals is connected to the outer periphery of each of the signal strip conductors and pulled out from an outer peripheral portion on one side defined by the core in the coil portion,
Each of the first and second output terminals is connected to an inner peripheral portion of each of the signal strip conductors and is drawn from an inner peripheral portion on the other side partitioned by the core in the coil portion. ,
The filter element according to claim 7 or 8, wherein the grounding terminal is connected to an outer peripheral portion of each of the grounding strip-like conductors and is drawn from an outer peripheral side portion on the other side of the coil portion. The coil portion is wound around the signal strip conductors so that the ground strip conductors are inside, and a gap is formed in the center portion.
The coil part is fitted with either an EI type or EE type core,
Each of the first and second input terminals is connected to an inner peripheral portion of each of the signal strip conductors and is drawn from an inner peripheral portion on one side defined by the core in the coil portion. ,
The grounding terminal is connected to the inner peripheral part of each grounding strip-shaped conductor and is drawn out from the inner peripheral side part on the other side partitioned by the core in the coil part,
The first and second output terminals are connected to the outer peripheral portion of each of the signal strip conductors and are led out from the outer peripheral portion on the other side of the coil portion. The filter element as described.

Images