JP2001136007A - Irreversible circuit element and communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive irreversible circuit element with an excellent characteristic that its magnetic body and its center conductor can easily be positioned and deviation in the position of the magnetic body can be prevented. SOLUTION: The magnetic body 55 is positioned by three projections 56 placed at an outer circumference of a grounding section 54 of the center conductors so as to be held at a prescribed position of the grounding section 54 with high accuracy and the center conductors 51-53 are placed on an upper face of the magnetic body 55 in crossing with each other at an angular distance of 120 degrees.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nonreciprocal circuit device such as an isolator and a circulator used in a high frequency band such as a microwave band, and a communication device using the same.

[0002]

2. Description of the Related Art A non-reciprocal circuit device of this type is, for example, shown in FIG.
The magnetic assembly 5 shown in FIG. In the magnetic assembly 5, the common ground portion 54 of the center conductors 51 to 53 is brought into contact with the lower surface of the magnetic body 55, and the three center conductors 51 to 53 are provided with an insulating sheet (not shown) interposed on the upper surface of the magnetic body 55. Are bent so as to intersect with each other at a predetermined angle, and each of the port portions P1, P2, and P3 corresponding to the tip of each of the center conductors 51 to 53 projects from the outer periphery of the magnetic body 55. Each of the center conductors 51 to 53 is the same as in FIG.
As shown in FIG. 1, a central portion serving as the ground portion 54 is continuously provided and integrated, and is formed so as to protrude outward from the ground portion 54.

The magnetic assembly 5 is assembled by a ground
The magnetic material 55 is placed on the magnetic material 4, and each of the center conductors 51 to 53 is bent at two positions, that is, at the lower and upper edges of the magnetic material 55. The non-reciprocal circuit device includes the magnetic assembly 5 housed in a magnetic yoke constituting a magnetic circuit together with a permanent magnet and the like, and the port portions P1, P2, P of the respective central conductors 51 to 53.
3, a matching capacitor is connected, and a DC magnetic field is applied to the magnetic assembly 5 by a permanent magnet.

[0004]

The accuracy of assembling each center conductor to the magnetic body and the crossing angle are important factors for determining the electrical characteristics of the nonreciprocal circuit device. The characteristics of the reversible circuit element deteriorate.

However, in the above-described conventional non-reciprocal circuit device, when assembling each center conductor to the magnetic material, it is difficult to accurately mount the magnetic material at a predetermined position of the ground portion. As shown in (1), there is a problem in that the position of the magnetic body and the center conductor is displaced, and the center conductor is deformed, the crossing angle of the center conductor fluctuates greatly, and the center conductor cannot be placed in close contact with the magnetic body. Was.
Further, the center conductor may be displaced by external force during or after assembling the magnetic assembly, and the center conductor may be deformed. For this reason, the characteristics may vary and the characteristics may be significantly deteriorated. Further, there is a problem that it is difficult to position the magnetic body and the center conductor, the workability (productivity) of assembling the magnetic assembly is reduced, and the manufacturing cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to easily position a magnetic body and a center conductor, to assemble the center conductor to the magnetic body accurately and easily, and to prevent displacement of the magnetic body. It is an object of the present invention to provide an inexpensive nonreciprocal circuit device having good characteristics and a communication device using the same.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a magnetic body in which a plurality of central conductors provided in contact with a ground portion on the lower surface of a magnetic body and projecting from the ground portion are wrapped around the magnetic body. In a non-reciprocal circuit device including a magnetic assembly disposed so as to be bent at a predetermined angle on an upper surface of a magnetic body, a projection for positioning the magnetic body is provided on a periphery of the ground portion. It is characterized by the following.

According to this configuration, the magnetic body is placed along the projection provided on the grounding portion, and the magnetic body can be easily positioned at a predetermined position on the grounding portion. further,
Since the external force at the time of bending the center conductor is restrained by the projections, it is possible to prevent the magnetic body from being misaligned with the center conductor. In addition, even during handling after assembling, the projection functions as a guide for suppressing positional deviation, so that positional deviation between the magnetic body and the center conductor is prevented.

Therefore, the center conductors are securely and accurately arranged at a predetermined angle on the magnetic body without deformation of the center conductors, so that the characteristics and quality can be improved and the production of the assembling work can be improved. Performance can be improved.

The positioning projection is formed integrally with the center conductor and the ground portion by punching the same conductor plate. Thereby, neither the number of components nor the man-hour for forming the protrusions is increased.

Further, a communication device according to the present invention is provided with a non-reciprocal circuit device having the above characteristics. This makes it possible to obtain a communication device that is inexpensive and has good characteristics.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a non-reciprocal circuit device according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a magnetic assembly and a diagram for explaining a configuration of a nonreciprocal circuit device. FIG. 2A is a plan view of a center conductor, and FIG. 2B is a side view of the center conductor. As shown in FIG. 1, the nonreciprocal circuit device of the present embodiment includes a magnetic assembly 5 in which three center conductors 51 to 53 are arranged on a magnetic body 55, and each port portion P1 of each of the center conductors 51 to 53. The matching capacitors C1, C2, and C3 are connected to P2 and P3, and the other end is connected to the ground. A DC magnetic field Hex is applied to the magnetic assembly 5 by a permanent magnet (not shown), and one port P3 is connected to the magnetic assembly 5. The terminating resistor R is connected to form an isolator. FIG. 1 shows the configuration of the isolator, but without connecting the terminating resistor R to the port P3, the port P
If 3 is configured as a third input / output unit, it becomes a circulator. Each of the port portions P1 to P3 corresponding to the tip of each of the center conductors 51 to 53 is formed so as to protrude from the outer periphery of the magnetic body 55, and is formed in a shape suitable for connection with another member in an actual product. You.

As shown in FIGS. 1 and 2, the magnetic assembly 5 abuts a common ground portion 54 on the lower surface of a disk-shaped magnetic body 55, and is bent so as to enclose the magnetic body 55 so that each center conductor is bent. 51 to 53 are arranged at a predetermined angle (about 120 degrees) from each other with an insulating sheet (not shown) interposed on the upper surface of the magnetic body 55. And the magnetic material 5
5 is positioned by a projection 56 provided on the grounding portion 54 and is held at a predetermined position.

The center conductors 51, 52 and 53 are formed by stamping a metal conductor plate such as copper.
As shown in FIG. 7, a circular grounding portion 54 serving as a common grounding end is provided. The grounding portion 54 is continuously connected and integrated, and protrudes outward from the grounding portion 54 at a predetermined angular interval (120 ° interval). It is provided. Three projections 56 are formed integrally on the periphery of the ground portion 54. Each projection 56 is provided so as to protrude on the outer periphery of the ground portion 54 at a substantially intermediate portion between the protruding portions of the center conductors 51 to 53, and is substantially perpendicular (bending angle θ:
(About 90 degrees). Note that the broken line in FIG. 2A shows the projection 56 before bending. The ground part 54 is formed in substantially the same shape as the magnetic body 55.

In assembling the magnetic assembly 5, first, the magnetic body 55 is placed on the common ground portion 54 along the projection 56, and then, each center is fixed by using a jig such as a roller or a holding plate. This is performed by bending the conductors 51 to 53 at two locations on the lower surface and the upper surface of the magnetic body 55.

As described above, in the present embodiment, only by inserting the magnetic body 55 between the protrusions 56, the magnetic body 55
6 and is easily positioned at a predetermined position of the ground portion 54, so that no positional deviation occurs. further,
Even when the center conductors 51 to 53 are bent, the movement of the magnetic body 55 is suppressed by the projection 56, and the displacement of the magnetic body 55 is prevented. Also, in handling after assembly, the magnetic body 55 is guided by the projection 56, and the displacement is prevented.

This makes it easy to assemble the magnetic assembly and assemble the entire non-reciprocal circuit device, prevent the center conductor from being deformed, and ensure that each center conductor is accurately positioned at a predetermined angle. Because it is often placed on a magnetic material,
Characteristic variations are reduced, and characteristics and quality are improved. Further, the positioning projections are formed integrally by punching the same conductor plate together with the ground portion of the center conductor, so that the number of parts does not increase and the formation cost does not increase.

Next, the structures of a magnetic assembly and a center conductor according to a second embodiment of the present invention are shown in FIGS. As shown in FIG. 3, the magnetic assembly 5 is configured by winding center conductors 51 to 53 around a square rectangular plate-shaped magnetic body 55.
The magnetic body 55 is positioned by six protrusions 56 provided on the peripheral edge of the ground portion 54. Center conductors 51-53
The grounding portion 54 is formed in substantially the same shape and size as the magnetic body 55, and as shown in FIG.
Is formed so as to protrude outward from the outer periphery and is bent upward at a predetermined angle θ in advance. In the present embodiment, the protrusion 56 is formed to be inclined so as to expand toward the upper side so that the magnetic body 55 can be easily inserted while being surrounded by the protrusion 56.

As in the first embodiment, the magnetic assembly 5 according to the present embodiment also includes a magnetic member 55 having a projection 5
After being placed along 6, the center conductors 51 to 53 are assembled by bending at two places on the lower surface and the upper surface of the magnetic body 55. Also in this configuration, since the magnetic body 55 is positioned and held by the projection 56, the same effect as in the first embodiment can be obtained.

Next, the structures of a magnetic assembly and a center conductor according to a third embodiment of the present invention are shown in FIGS. As shown in FIG. 6, the center conductor of this embodiment is provided with two cut grooves from the outer periphery toward the center at three places on the periphery of the circular ground portion 54, and the portion between the grooves is formed upward. The projection 56 is formed by being bent to the side. As shown in FIG. 5, the magnetic assembly 5 mounts a disk-shaped magnetic body 55 while being surrounded by the projections 56 on the ground part 54, and
53 is assembled by bending at a predetermined position.

Next, the structures of a magnetic assembly and a center conductor according to a fourth embodiment of the present invention are shown in FIGS. As shown in FIG. 8, the central conductor of this embodiment is provided with U-shaped cut grooves at eight positions on the periphery of a square ground portion 54, and the portion surrounded by the grooves is bent upward to form protrusions 56. Is formed. As shown in FIG. 7, the magnetic assembly 5 has a rectangular magnetic body 55 placed between the projections 56 on the ground portion 54 while being surrounded by the projections 56, and the center conductors 51 to 53 are bent at predetermined positions. Assembled. As in the third and fourth embodiments, the positioning protrusion 56 may be formed closer to the center than the outer periphery of the ground portion 54. Also in this case, the projection 56 is provided substantially along the outer peripheral surface (side surface) of the magnetic body.
Also in the magnetic assemblies 5 of the third and fourth embodiments, since the magnetic body 55 is positioned by the projection 56, the same effect as in the first embodiment can be obtained.

The formation positions and the number of the projections are not limited to those shown in the above-described embodiments, but are preferably provided at positions where no displacement occurs when the magnetic material is placed on the ground portion. For example, at least three protrusions in the case of a disk-shaped magnetic material as in the first and third embodiments, and four sides of the magnetic material in the case of a square-shaped magnetic material as in the second embodiment. It is desirable to provide at least one for each.

The shape and number of the projections are appropriately set in consideration of the strength and the like, and the bending angle θ of the projections is set to 90 degrees or less so that the magnetic body can be easily mounted on the ground.

In each of the embodiments described above, the projection is bent before the magnetic body is mounted. However, after the magnetic body is mounted on the ground portion, the projection is bent to position the magnetic body. It may be fixed.

In each of the above embodiments, the projections are formed by the same member at the same time. However, the projections may be formed by joining different members.

Next, the configuration of a communication device according to a fifth embodiment of the present invention is shown in FIG. In this communication device, an antenna ANT is connected to an antenna end of a duplexer DPX including a transmission filter TX and a reception filter RX, and an isolator ISO is connected between an input end of the transmission filter TX and a transmission circuit, A receiving circuit is connected to the output terminal of the receiving filter RX. The transmission signal from the transmission circuit passes through the isolator ISO and the antenna ANT through the transmission filter TX of the duplexer DPX.
Originated from Further, the reception signal received by the antenna ANT is input to the reception circuit through the reception filter RX of the duplexer DPX.

Here, the non-reciprocal circuit device described in each of the above embodiments can be used as the isolator ISO. By using the non-reciprocal circuit device according to the present invention, it is possible to obtain a communication device that is inexpensive and has good characteristics.

[0028]

As described above, according to the non-reciprocal circuit device according to the present invention, the magnetic body is grounded only by placing the magnetic body along the projection between the projections provided on the grounding portion. The part can be easily positioned at a predetermined position. Further, since the external force at the time of bending the center conductor is restrained by the projection, it is possible to prevent the magnetic body from being misaligned with the center conductor. Also, during handling after assembly,
Since the projection functions as a guide for suppressing displacement, the displacement between the magnetic body and the center conductor can be prevented. Therefore, each center conductor is reliably and accurately arranged at a predetermined angle on the magnetic body without deformation of the center conductor, so that characteristics and quality can be improved, and productivity of assembly work is improved. In addition, the manufacturing cost can be reduced.

Further, by forming the projection integrally with the center conductor on the same conductor plate, the cost of the entire center conductor does not increase.

Further, by using the non-reciprocal circuit device according to the present invention, it is possible to obtain an inexpensive communication device having good characteristics.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic assembly according to a first embodiment and a diagram for explaining a configuration of a non-reciprocal circuit device.

FIG. 2 is a view showing a center conductor according to the first embodiment;
(A) is a plan view and (b) is a side view.

FIG. 3 is a plan view of a magnetic assembly according to a second embodiment.

FIG. 4 is a view showing a center conductor according to a second embodiment;
(A) is a plan view and (b) is a side view.

FIG. 5 is a plan view of a magnetic assembly according to a third embodiment.

FIG. 6 is a view showing a center conductor according to a third embodiment;
(A) is a plan view and (b) is a side view.

FIG. 7 is a plan view of a magnetic assembly according to a fourth embodiment.

FIG. 8 is a view showing a center conductor according to a fourth embodiment;
(A) is a plan view and (b) is a side view.

FIG. 9 is a block diagram of a communication device according to a fifth embodiment.

FIG. 10 is a perspective view of a conventional magnetic assembly.

FIG. 11 is a plan view showing a state where a magnetic body is placed on a ground portion of a conventional center conductor.

[Explanation of symbols]

 Reference Signs List 5 magnetic assembly 51 to 53 center conductor 54 ground part 55 magnetic body 56 protrusion P1 to P3 port part C1 to C3 matching capacitor R terminator

Claims (3)

[Claims] 1. A grounding portion is brought into contact with a lower surface of a magnetic body, and a plurality of central conductors provided so as to protrude from the grounding portion are bent so as to wrap the magnetic body, and intersect the upper surface of the magnetic body at a predetermined angle. A non-reciprocal circuit device comprising a magnetic assembly arranged in a position, wherein a projection for positioning the magnetic material is provided on a periphery of the ground portion. 2. The non-reciprocal circuit device according to claim 1, wherein the projection is formed integrally with the grounding portion on the same conductor plate. 3. A communication device comprising the non-reciprocal circuit device according to claim 1 or 2.