Irreversible circuit element

Abstract

To provide an irreversible circuit element such that when two or more irreversible circuits are connected, the irreversible circuits can be made compact.SOLUTION: An irreversible circuit element comprises: a first magnetic substrate which has a first principal surface and a second principal surface electrically connected to the first principal surface and located on the opposite side from the first principal surface; a second magnetic substrate which has a third principal surface and a fourth principal surface electrically connected to the third principal surface and located on the opposite side from the third principal surface, and is so arranged that the second principal surface and the third principal surface are opposed to each other; a solder connection part which connects the first principal surface and another electric circuit; a solder connection part which electrically connects the second principal surface and the third principal surface; and permanent magnetic flux which passes through the first magnetic substrate and the second magnetic substrate.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to irreversible circuit elements.

Background Art

[0002] As a conventional irreversible circuit element, Patent Document 1 discloses an element including a first ground conductor and a second ground conductor provided on a magnetic substrate, a plurality of through holes electrically connecting the first ground conductor and the second ground conductor, a center conductor provided on the magnetic substrate, and a plurality of input terminals electrically connected to the center conductor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above-described conventional irreversible circuit element has a problem that when two identical irreversible circuits are connected for high isolation, the planar dimensions of the irreversible circuit become large.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain an irreversible circuit element capable of miniaturizing an irreversible circuit when two or more irreversible circuits are connected.

Means for Solving the Problems

[0006] A first magnetic substrate having a first main surface and a second main surface that is electrically connected to the first main surface and is on the opposite side of the first main surface; A third main surface and a second magnetic substrate having a fourth main surface that is electrically connected to the third main surface and is on the opposite side of the third main surface, wherein the second main surface and the third main surface are arranged to face each other; A solder connection part that connects the first main surface and another electric circuit, A solder connection part that electrically connects the second main surface and the third main surface, A permanent magnetic flux that provides a magnetic flux passing through the first magnetic substrate and the second magnetic substrate, A non-reversible circuit element comprising the above.

Advantages of the Invention

[0007] The non-reversible circuit element of the present disclosure can reduce the planar dimensions of the non-reversible circuit when two or more are connected.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following description, the same reference numerals are given to the same components in the drawings, and their names and functions are also the same or similar. Therefore, detailed descriptions thereof may be omitted.

[0010] Embodiment 1. ***Description of the Configuration of Embodiment 1*** The configuration of the irreversible circuit element 100 in Embodiment 1 will be described with reference to FIG. 1. FIG. 1 is a longitudinal sectional view showing the configuration of the irreversible circuit element 100. As shown in FIG. 1, the irreversible circuit element 100 includes a first magnetic substrate 11, a second magnetic substrate 12, through-holes 21a, 21b, 22a, 22b, ground conductors 31a, 31b, 32a, 32b, signal conductors 41a, 42a, 42b, solder connection parts 51a, 51b, 51c, 51d, 52a, 52b, 52c, 52d, permanent magnets 61a, 61b, 61c, and adhesive agents 71a, 71b, 71c.

[0011] The first magnetic substrate 11 and the second magnetic substrate 12 are substrates made of a magnetic material. The first magnetic substrate 11 has a first main surface and a second main surface on the opposite side of the first main surface. The second magnetic substrate 12 has a third main surface and a fourth main surface on the opposite side of the third main surface. The second magnetic substrate 12 is arranged such that the second main surface and the third main surface face each other.

[0012] A plurality of through-holes including through-holes 21a and 21b are formed in the first magnetic substrate 11 at intervals of not more than half of the wavelength of the operating frequency band. Similarly, a plurality of through-holes including through-holes 22a and 22b are formed in the second magnetic substrate 12 at intervals of not more than half of the wavelength of the operating frequency band.

[0013] FIG. 2 and FIG. 3(a) are plan views of the first main surface. As shown in FIG. 2, a plurality of through-holes including through-holes 21a and 21b are formed in the first main surface at intervals of not more than half of the wavelength of the operating frequency band. The through-holes electrically connect the ground conductor 31a and the ground conductor 31b through the magnetic substrate 11. That is, the first main surface and the second main surface are electrically connected.

[0014] In FIG. 3, the through-holes are omitted. As shown in FIG. 3(a), the ground conductor 31a and the signal conductor 41a are provided on the first main surface. The ground conductor 31a and the signal conductor 41a may be made of the same material.

[0015] The end of the signal conductor 41a functions as a terminal. At this time, the terminals 23a1, 23a2, and 23a4 are arranged adjacent to each other in sequence. The terminals 23a1, 23a2, and 23a4 are electrically connected by the signal conductor 41a. Also, away from the signal conductor 41a, the terminals 23a3 and 23a5 are provided.

[0016] Figure 3(b) is a plan view of the second main surface. As shown in Figure 3(b), on the second main surface, a ground conductor 31b and a signal conductor 41b are provided. Also, the ends of the signal conductor 41b become the terminals 23b3 and 23b4. That is, the terminals 23b3 and 23b4 are electrically connected by the signal conductor 41b. Similarly, away from the signal conductor 41b, the terminals 23b1 and 23b2 are provided.

[0017] Figure 3(c) is a plan view of the third main surface. As shown in Figure 3(c), on the third main surface, a ground conductor 32a and a signal conductor 42a are provided. Also, a plurality of through holes including the through holes 22a and 22b are formed. The ends of the signal conductor 42a are arranged such that the terminals 23c1, 23c2, and 23c3 are adjacent to each other in sequence. The terminals 23c1, 23c2, and 23c3 are electrically connected by the signal conductor 42a.

[0018] Figure 3(d) is a plan view of the fourth main surface. As shown in Figure 3(a), on the fourth main surface, a ground conductor 32b is provided.

[0019] In addition, as shown in Figure 1, a permanent magnet 61a is attached to the central portion of the first main surface via an adhesive 71a. A permanent magnet 61b is attached to the central portion of the second main surface via an adhesive 71b. A permanent magnet 61c is attached to the central portion of the fourth main surface via an adhesive 71c.

[0020] Generally, when there is a vertical magnetic field penetrating a conductor, between the terminals connected to that conductor, an electrical signal is transmitted clockwise or counterclockwise according to the direction of the magnetic field.

[0021] FIG. 4 is a diagram showing magnetic fluxes generated by permanent magnets 61a, 61b, and 61c. In the non-reversible circuit element 100, magnetic fluxes indicated by arrow A penetrate the signal conductor 41a and the signal conductor 42a by the permanent magnets 61a, 61b, and 61c. Also, it is assumed that an electrical signal is transmitted clockwise between terminals connected to the signal conductor 41a and the signal conductor 42a.

[0022] Based on FIGS. 1 and 3, the electrical connection relationship between the main surfaces will be described. The terminal 23a3 in FIG. 3(a) and the terminal 23b1 in FIG. 3(b) are electrically connected via a through hole through the magnetic substrate 11. Similarly, the terminal 23a5 and the terminal 23b2, and the terminal 23a2 and the terminal 23b3 are also electrically connected via a through hole through the magnetic substrate 11.

[0023] The terminal 23b1 in FIG. 3(b) and the terminal 23c1 in FIG. 3(c) are electrically connected by the solder connection portion 52b in FIG. 1. That is, the solder connection portion 52b shown in FIG. 1 is located between the terminal 23b1 in FIG. 3(b) and the terminal 23c1 in FIG. 3(c). Also, the terminal 23b2 and the terminal 23c2 are electrically connected by the solder connection portion 52c. That is, the solder connection portion 52c shown in FIG. 1 is located between the terminal 23b2 in FIG. 3(b) and the terminal 23c2 in FIG. 3(c).

[0024] In addition, the terminals 23c1, 23c2, and 23c3 on the third main surface are arranged to be located at different positions from the terminals 23a1, 23a2, and 23a4 on the first main surface when the first main surface and the third main surface overlap. This is because, generally, due to the characteristics of the non-reversible circuit element, the angles between the terminals provided on the signal conductor are equal, and it is necessary to connect the non-reversible circuits in series to increase the resistance.

[0025] Note that the distances from the center of the signal conductor 41a to the terminals 23c1, 23c2, and 23c3 and the distances from the center of the signal conductor 42a to the terminals 23a1, 23a2, and 23a4 may be different. However, as described above, the terminals are arranged so that the angles between the terminals provided on the signal conductor are equal. Also, pay attention to arranging the terminal 23b1 on the second main surface and the terminals 23c1 on the third main surface, and the terminal 23b2 on the second main surface and the 23c2 on the third main surface at overlapping positions.

[0026] By arranging the terminals on the first main surface and the second main surface as shown in FIG. 3, the non-invertible circuit element 100 can connect two non-invertible circuits in series. Here, for example, when a transmission signal enters from the terminal 23a4 in the non-invertible circuit element 100 of Embodiment 1, the transmission signal proceeds in order through the terminal 23a1, the terminal 23a2, the terminal 23b3 on the second main surface, the terminal 23b3 on the second main surface, the terminal 23b4, the terminal 23c3 on the third main surface, the terminal 23c1, the terminal 23b1 on the second main surface, and the 23a3 on the first main surface.

[0027] Note that, as a virtual comparative example, for example, assume that the terminal 23a4 on the first main surface and the terminal 23c1 on the third main surface are arranged to overlap in a direction perpendicular to each main surface, and a virtual terminal is provided at a position overlapping the terminal 23a4 on the first main surface on the second main surface. In this case, the transmission signal entering from the terminal 23a4 proceeds through the terminal 23a1, the terminal 23a2, the terminal 23b3 on the second main surface, the terminal 23c3 on the third main surface, the terminal 23c1, the virtual terminal on the second main surface, and the terminal 23a4 on the first main surface, and the transmission signal returns. Therefore, it will not function as a circuit.

[0028] Also, each terminal on the first main surface is connected to an external electric circuit. The first main surface and the substrate 200 are electrically connected by solder connection portions 51a, solder connection portions 51b, solder connection portions 51c, and solder connection portions 51d.

[0029] FIG. 5 is a diagram showing a state where the irreversible circuit element 100 is mounted on a substrate. The substrate 200 is a substrate on which an external electric circuit of the irreversible circuit element 100 is mounted. The substrate 200 has a recess where the permanent magnet 61a is incorporated. Note that when the permanent magnet 61a has the same thickness as the solder connection portion 51a, the recess may not be provided.

[0030] When the irreversible circuit element 100 is connected to an antenna, for example, the terminal 23a1 in FIG. 3 may be connected to the antenna by the electric circuit of the substrate 2. Also, the terminal 23a3 may be connected to the receiving circuit. In that case, the terminal 23a4 is connected to the transmitting circuit. The terminal 23a5 is a dummy port and is terminated with ground or 50 Ω.

[0031] Also, the electromagnetic wave radiation from the center conductor 23 to the outside is shielded by the ground conductors 31a, 31b, 32a, 32b, the through holes that electrically connect the ground conductors 31a and 31b via the magnetic substrate 11, the through holes that electrically connect the ground conductors 32a and 32b via the magnetic substrate 12, the solder connection portions 51a, 51d, 52a, 52d, and the space formed by the substrate 200.

[0032] ***Description of the operation of Embodiment 1*** Subsequently, assuming the case where the irreversible circuit element 100 is connected to an antenna, the operation of the irreversible circuit element 100 at the time of reception and transmission of the antenna will be described. In the irreversible circuit element 100, signals are transmitted counterclockwise between the terminals as shown in FIG. 3.

[0033] First, at the time of reception, the signal received by the antenna enters the terminal 23a1. The signal is transmitted to the terminal 23a2 via the signal conductor 42b. Subsequently, it is transmitted in order through the terminals 23b3, 23b4, 23c3, 23c1, 23b1, 23a3, and output to the receiving circuit.

[0034] As described above, in the signal conductors 41a and 42a, the signal is transmitted counterclockwise between the terminals. Since there is no magnetic field due to the permanent magnets 61a, 61b, and 61c in the signal conductor 41b, the signal is transmitted according to the potential difference.

[0035] At the time of transmission, when the transmission signal enters the terminal 23a4, it is transmitted from the terminal 23a1 to the antenna. As a result, the signal does not enter the receiving circuit from the terminal 23a3.

[0036] Furthermore, the electrical signal that has returned from the receiving circuit is transmitted from the terminal 23a3 to the non - reversible circuit element 100. The signal is transmitted in sequence through the terminals 23b1, 23c1, 23c2, 23b2, 23a5 and output to the dummy port.

[0037] ***Explanation of the effects of Embodiment 1*** In the non - reversible circuit element 100 including the first magnetic substrate 11 having the first main surface and the second main surface that is electrically connected to the first main surface and is on the opposite side of the first main surface, the third main surface, and the third main surface is electrically connected to the fourth main surface on the opposite side of the third main surface, and the second magnetic substrate 12 is arranged such that the second main surface and the third main surface face each other, the solder connection portions (51b, 51c) connecting the first main surface and other electrical circuits, the solder connection portions (52b, 52c) electrically connecting the second main surface and the third main surface, and the permanent magnetic flux applying magnetic flux passing through the first magnetic substrate and the second magnetic substrate, the non - reversible circuit of the first magnetic substrate 11 and the non - reversible circuit of the second magnetic substrate 12 are connected in a direction perpendicular to the base. Thereby, compared with the case of connecting two non - reversible circuits in a planar manner, the planar occupation area can be reduced.

[0038] In addition, by providing permanent magnets 61a, 61b, and 61c that apply the same magnetic flux to the first magnetic substrate and the second magnetic substrate, the magnetic flux required for each irreversible circuit can be shared. As a result, the irreversible circuit element 100 of Embodiment 1 has an effect that it can be miniaturized by reducing the volume of the permanent magnet as compared with the case where the irreversible circuits are connected planarly.

[0039] In addition, since the radiation of external electromagnetic waves is shielded in the space formed by the ground conductors 31a, 31b, 32a, 32b, the through holes that electrically connect the ground conductors 31a and 31b via the magnetic substrate 11, the through holes that electrically connect the ground conductors 32a and 32b via the magnetic substrate 12, the solder connection portions 51a, 51d, 52a, and 52d, the irreversible circuit 100 according to Embodiment 1 can suppress unnecessary radiation of external electromagnetic waves.

[0040] Note that the number, thickness, and width of the permanent magnets 61a, 61b, and 61c do not matter as long as they can apply a required amount of magnetic flux to the first magnetic substrate 11 and the second magnetic substrate 12. Further, for example, by not providing the permanent magnet 61b, the connection by the solder connection portions 52a, 52b, 52c, and 52d can be facilitated.

[0041] In each of the above-described embodiments described in this specification, the relative arrangement relationship of each component may be described, but these are all examples in all aspects and are not limited to those in which each embodiment is described. Therefore, an infinite number of variations that are not illustrated are assumed within the scope of each embodiment. For example, it includes the case where any component is deformed, added, or omitted, and further, the case where at least one component in at least one embodiment is extracted and combined with the components of other embodiments. That is, it is possible to freely combine each embodiment, or to appropriately deform or omit each embodiment.

[0042] Also, as long as there is no contradiction, the components described as being "one" provided in each of the above embodiments may be provided with "one or more". Further, each component is a conceptual unit, including the case where one component is composed of a plurality of structures and the case where one component corresponds to a part of a certain structure.

[0043] Hereinafter, various aspects of the present disclosure will be collectively listed as appendices.

[0044] (Appendix 1) A first magnetic substrate having a first main surface and a second main surface that is electrically connected to the first main surface and is on the opposite side of the first main surface; A second magnetic substrate having a third main surface and a fourth main surface that is electrically connected to the third main surface and is on the opposite side of the third main surface, and the second main surface and the third main surface are arranged to face each other; A solder connection portion for connecting the first main surface and another electric circuit; A solder connection portion for electrically connecting the second main surface and the third main surface; A permanent magnetic flux for applying a magnetic flux passing through the first magnetic substrate and the second magnetic substrate; A non-reversible circuit element comprising: (Appendix 2) The non-reversible circuit element according to Appendix 1, wherein the permanent magnet comprises a first permanent magnet attached to the center of the first main surface, a second permanent magnet attached to the second main surface, and a third permanent magnet attached to the fourth main surface. (Appendix 3) The first main surface and the third main surface are each provided with signal conductors having a plurality of terminals for transmitting electrical signals, When the first main surface and the first main surface overlap in the plate thickness direction, the positions of the terminals of the signal conductors provided on the first main surface and the terminals of the signal conductors provided on the third main surface are arranged so as not to overlap in the plate thickness direction. The non-reversible circuit element according to Appendix 1 or 2.

Explanation of Reference Numerals

[0045] 100 Non-reversible circuit element, 200 substrate, 11 first magnetic substrate, 12 second magnetic substrate, 21a, 21b, 22a, 22b through holes, 23a1, 23a2, 23a3, 23a4, 23a5, 23b1, 23b2, 23b3, 23b4, 23c1, 23c2, 23c3 terminals, 31a, 31b, 32a, 32b ground conductors, 41a, 42a, 42b signal conductors, 51a, 51b, 51c, 51d, 52a, 52b, 52c, 52d solder connection parts, 61a, 61b, 61c permanent magnets, 71a, 71b, 71c, adhesive

Claims

1. a first magnetic substrate having a first main surface and a second main surface electrically connected to the first main surface and opposite to the first main surface; a second magnetic substrate having a third main surface and a fourth main surface electrically connected to the third main surface and opposite to the third main surface, the second main surface and the third main surface being disposed so as to face each other; a solder connection portion that connects the first main surface to another electric circuit; a solder connection portion electrically connecting the second principal surface and the third principal surface; a permanent magnetic flux that provides a magnetic flux passing through the first magnetic substrate and the second magnetic substrate; A non-reciprocal circuit element comprising:

2. 2. The non-reciprocal circuit element according to claim 1, wherein the permanent magnets comprise a first permanent magnet attached to a center of the first main surface, a second permanent magnet attached to the second main surface, and a third permanent magnet attached to the fourth main surface.

3. the first principal surface and the third principal surface are each provided with a signal conductor having a plurality of terminals and transmitting an electrical signal; When the first main surface and the third main surface are overlapped in a plate thickness direction, the positions of the terminals of the signal conductors provided on the first main surface and the terminals of the signal conductors provided on the third main surface are arranged so as not to overlap in the plate thickness direction. The non-reciprocal circuit device according to claim 1 .

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