JP2003218608A - Nonreversible circuit element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nonreversible circuit element with excellent quality where a mount position of a magnet of which is stabilized. <P>SOLUTION: A closed magnetic circuit of the nonreversible circuit element of this invention consists a first yoke 1 and a second yoke 3 placed at a lower side of a ferrite member 4, and since a positioning section 1d for abutting on an outer circumferential face of the magnet 2 to position the magnet 2 is provided on the first yoke 1, the mount position of the magnet 2 is stabilized and stably constant. Thus, the nonreversible circuit element with excellent quality can be provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-reciprocal circuit device such as a circulator or an isolator applied to an antenna duplexer or the like.

[0002]

2. Description of the Related Art A conventional non-reciprocal circuit device will be described with reference to FIG. 7. The conventional non-reciprocal circuit device includes a U-shaped first yoke 51 and a first yoke 51. The magnet 52, and the ferrite member 53 disposed below the magnet 52, and the ferrite member 5 at an interval of 120 degrees.
3, three center conductors 54 made of metal plates partially crossed with each other, a holding member 55 for holding the ferrite member 53, and a U-shaped second yoke 56. Has been done.

The ferrite member 53 having the central conductor 54 attached is inserted into the hole 55a of the holding member 55, and the magnet 52 is arranged on the ferrite member 55. The yokes 51 and 56 are covered. Then, the magnet 5 is formed by the first and second yokes 51 and 56.
2, while sandwiching the ferrite member 53 and the holding member 55, the first and second yokes 51 and 56, which are alternately arranged in U-shape, are combined to form the first and second yokes 51,
56 and 56 form a magnetic closed circuit.

[0004]

The conventional non-reciprocal circuit device has a problem that the mounting position of the magnet 52 varies because the magnet 52 is simply arranged in the first yoke 51. Then, there is a problem that the performance is not constant and the quality is deteriorated due to the variation of the mounting position of the magnet 52.

Therefore, an object of the present invention is to provide a non-reciprocal circuit device having a stable magnet mounting position and good quality.

[0006]

As a first solving means for solving the above-mentioned problems, a flat ferrite member,
First, second, and third central conductors that are located on the ferrite member and that are provided on different vertical planes with the dielectric material sandwiched between them, and that partially intersect in the vertical direction, and are arranged on this central conductor. Magnet, a first yoke arranged so as to cover the magnet, and a second yoke arranged on the lower surface side of the ferrite member and forming a magnetic closed circuit with the first yoke. The first yoke is provided with a positioning portion that contacts the outer peripheral surface of the magnet and positions the magnet.

As a second solving means, the first yoke has a flat plate portion on which the magnet is placed, and the flat plate portion has a plurality of flat plates arranged along the outer peripheral surface of the magnet. The said positioning part which consists of individual protrusion parts was provided.

As a third solving means, the first yoke has a flat plate portion on which the magnet is placed, and the flat plate portion is arranged on the outer peripheral surface of the magnet. The positioning portion including a plurality of bent portions is provided.

As a fourth solving means, the first yoke has a flat plate portion on which the magnet is placed, and a pair of side plate portions opposed to each other bent from the flat plate portion. In the configuration, the positioning portion including a plurality of bent portions arranged at the outer peripheral surface of the magnet is provided.

As the fifth means for solving the problems,
The second yoke has a U-shape and has a flat plate portion, a pair of opposing side plate portions bent from the flat plate portion, and a pair of opposing open portions provided at positions orthogonal to the side plate portions. And the side plate portions of the first and second yokes are coupled to each other, and one end of the center conductor is led out from the open portion.

[0011]

1 is an exploded perspective view of a non-reciprocal circuit device according to a first embodiment of the present invention, and FIG. 2 is a non-reciprocal circuit device according to the present invention. FIG. 3 is a cross-sectional view of a main part of the device according to the first embodiment, FIG. 3 is an exploded perspective view of a first embodiment of a nonreciprocal circuit device according to the present invention, in which a first yoke and a magnet are turned over, FIG. 5 is an exploded perspective view of a non-reciprocal circuit device according to a second embodiment of the present invention in which a first yoke and a magnet are turned upside down. FIG. 6 is an equivalent circuit diagram in which the nonreciprocal circuit device of the present invention is applied to an isolator.

Next, the configuration of the first embodiment of the nonreciprocal circuit device of the present invention will be described with reference to FIGS. 1 to 3, in which the first yoke 1 made of a U-shaped magnetic plate (iron plate or the like) is used. A flat plate portion 1a which is a rectangular upper plate, and a pair of opposite side plate portions 1b which are bent downward from opposite sides of the flat plate portion 1a.
And a pair of opposed open portions 1c provided at positions orthogonal to the side plate portion 1b, and a positioning portion 1d formed by a plurality of protrusion portions provided on the flat plate portion 1a by an extrusion process.

The disk-shaped magnet 2 is placed on the flat plate portion 1a located on the inner surface of the first yoke 1, and the outer peripheral surface of the magnet 2 is arranged along the outer peripheral surface of the plurality of positioning portions. The magnet 2 is positioned so as to be in contact with 1d.

The second yoke 3 made of a U-shaped magnetic plate (iron plate or the like) comprises a flat plate portion 3a which is a square bottom plate, and a pair of opposed flat sheets bent upward from opposite sides of the flat plate portion 3a. Side plate portion 3b and a pair of open portions 3c facing each other and provided at a position orthogonal to the side plate portion 3b. The pair of side plate portions 3b of the second yoke 3 is coupled to the pair of side plate portions 1b of the first yoke 1 to form a magnetic closed circuit, and at the same time, the first and second yokes 1 are formed. , 3
Indicates that the open portions 1c and 3c are aligned with each other.

YIG (Yttrium iron ga)
The flat ferrite member 4 made of rnet) or the like is attached in a state of being placed on the flat plate portion 3a of the second yoke 3.

The chip capacitor C1 has an insulator 21 made of a plate-shaped ceramic or the like, and first and second electrode portions made of silver or the like provided on two flat outer surfaces of the insulator 21 facing each other. 22 and 23, and a capacitance is formed between the first and second electrode portions 22 and 23 facing each other.

The three chip capacitors C1 are
The first electrode portion 22 is soldered to the flat plate portion 3a of the second yoke 3, attached to the second yoke 3, and grounded to the second yoke 3.

The first, second, and third central conductors 5, 6, 7 made of a conductive plate such as copper are provided with a pair of bent portions 5a, 6a, 7a provided at both ends, and one bent portion. Connection parts 5b, 6 provided at the ends of 5a, 6a, 7a
b, 7b and terminal portions 5c, 6c, 7c that are formed by bending at the ends of the other bent portions 5a, 6a, 7a.

The first, second and third central conductors 5,
6 and 7 are arranged on different planes in the vertical direction with a dielectric 8 made of an insulating material sandwiched therebetween, and are arranged at intervals of 120 degrees, and a part of them intersect in the vertical direction. Has become. Moreover, these first, second, and third central conductors 5, 6, and 7 are placed on the ferrite member 4 via the dielectric 8.

At this time, the first, second and third central conductors 5,
Each of the terminal portions 5c, 6c and 7c of 6, 7 is an open portion 1
c and 3c, it is led out to the outside and the terminal part 5
Each of c, 6c, and 7c is soldered and electrically connected to the second electrode portion 23 of the chip capacitor C1. The connecting portions 5b, 6b, 7b are connected to the second yoke 3
It is soldered to the flat plate portion 3a and electrically connected in a grounded state.

The first, second and third central conductors 5,
The magnets 2 positioned on the first yoke 1 are located on the magnets 6 and 7.
Are arranged. In this state, the side plate portions 1b and 3b of the first and second yokes 1 and 3 are coupled to each other, and the magnet 2, the ferrite member 4 and the like are connected between the first and second yokes 1 and 3. When sandwiched,
A non-reciprocal circuit device including a circulator or an isolator is formed.

The nonreciprocal circuit device having such a structure is mounted on a circuit board having a conductive pattern, which is not shown here. When the non-reciprocal circuit device is mounted, the terminal portions 5c, 6c, 7c of the first, second, and third central conductors 5, 6, 7 are soldered to the conductive pattern for wiring, and Second yoke 3
The flat plate portion 3a is soldered to the conductive pattern for grounding.

FIG. 4 shows a second embodiment of the nonreciprocal circuit device according to the present invention. The second embodiment will be described below.
The flat plate portion 1a of the first yoke 1 is provided with a positioning portion 1d composed of a plurality of bent portions arranged at the outer peripheral surface of the magnet 2, and the outer peripheral surface of the magnet 2 is positioned by the positioning portion 1d. It has been configured. The other structure is the same as that of the first embodiment.

In the second embodiment, the positioning portion 1d composed of the bent portion is provided on the flat plate portion 1a, but the pair of opposed side plate portions 1b are provided with the bent portions and the positioning portion 1d is provided. Also good. Further, although the magnet has been described as a disc-shaped one, a polygonal one such as a quadrangle may be used.

FIG. 5 is an equivalent circuit diagram in which the non-reciprocal circuit device of the present invention is applied to a circulator. Terminal portions 5c, 6c, 7c which are output terminals are provided, and the connection portions 5b, 6b, 7b on the other end side thereof are grounded, and the first, second and third central conductors 5,
A grounded chip capacitor C1 is connected to the terminal portions 5c, 6c and 7c of 6, 7 respectively.

FIG. 6 is an equivalent circuit diagram in which the nonreciprocal circuit device of the present invention is applied to an isolator, in which the first central conductor 5 and the resistor 15 are connected in series, and the connecting portion connected to the resistor 15 is connected. 16 is a grounded chip capacitor C1
Is formed, and the connecting portion 5b of the first central conductor 5 is grounded.

Further, terminal portions 6c and 7c serving as input / output terminals are provided at one end sides of the second and third center conductors 6 and 7, respectively, and further, connecting portions 6b and 7 at the other end sides thereof, respectively.
b is grounded, and the grounded chip capacitor C is connected to the terminals 6c and 7c of the second and third central conductors 6 and 7.
1 is connected. Furthermore, the second and third central conductors 6, 7 to which the chip capacitor C1 is connected
, The inductors 17 and 18 exist on both sides of the chip capacitor C1.

[0028]

The nonreciprocal circuit device of the present invention is provided with a flat plate-shaped ferrite member, and is disposed on the ferrite member on different planes in the vertical direction with the dielectric material sandwiched therebetween. Crossing first, second, and third central conductors, a magnet arranged on the central conductor, a first yoke arranged so as to cover the magnet, and arranged on the lower surface side of the ferrite member, A second yoke that forms a magnetic closed circuit with the first yoke;
Since the first yoke is provided with a positioning portion for contacting the outer peripheral surface of the magnet to position the magnet, the mounting position of the magnet is stable and constant. Therefore, a non-reciprocal circuit device having good quality can be provided. Further, since the first yoke also serves as the positioning of the magnet, an inexpensive one can be obtained.

Further, the first yoke has a flat plate portion on which the magnet is placed, and the flat plate portion is provided with a positioning portion composed of a plurality of protrusions arranged along the outer peripheral surface of the magnet. As a result, the structure thereof is simple, inexpensive, and easy to assemble.

Further, the first yoke has a flat plate portion on which the magnet is placed, and the flat plate portion is provided with a positioning portion composed of a plurality of bent portions arranged on the outer peripheral surface of the magnet. Since it is provided, the structure thereof is simple, inexpensive, and easy to assemble.

The first yoke has a flat plate portion on which the magnet is placed, and a pair of opposing side plate portions bent from the flat plate portion. The side plate portion is located on the outer peripheral surface of the magnet. Since the positioning portion composed of a plurality of bent portions arranged in the same manner is provided, the structure thereof is simple, inexpensive, and easy to assemble.

The first and second yokes have a U-shape, and are provided at a flat plate portion, a pair of opposing side plate portions bent from the flat plate portion, and at positions orthogonal to the side plate portions. Since the side plate portions of the first and second yokes are coupled to each other and one end of the central conductor is led out from the open portion, the material of the first and second yokes is formed. In addition to being low in cost and inexpensive, the center conductor can be easily derived, and good assembling can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a non-reciprocal circuit device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a non-reciprocal circuit device according to a first embodiment of the present invention.

FIG. 3 relates to a first embodiment of a nonreciprocal circuit device of the present invention,
The disassembled perspective view of the state which turned the 1st yoke and the magnet inside out.

FIG. 4 relates to a second embodiment of the nonreciprocal circuit device of the present invention,
The disassembled perspective view of the state which turned the 1st yoke and the magnet inside out.

FIG. 5 is an equivalent circuit diagram in which the nonreciprocal circuit device of the present invention is applied to a circulator.

FIG. 6 is an equivalent circuit diagram in which the nonreciprocal circuit device of the present invention is applied to an isolator.

FIG. 7 is an exploded perspective view of a conventional non-reciprocal circuit device.

[Explanation of symbols]

1 first yoke 1a Flat plate part 1b Side plate part 1c open part 1d Positioning part 2 magnets 3 second yoke 3a Flat plate part 3b Side plate part 3c open part 4 Ferrite material 5 First central conductor 5a Bent section 5b connection 5c terminal part 6 Second center conductor 6a Bent section 6b connection 6c terminal part 7 Third central conductor 7a Bent part 7b connection 7c terminal part 8 Dielectric 15 Resistance 16 Connection 17 Inductor 18 inductor C1 chip capacitor 21 Insulator 22 First electrode part 23 Second electrode part

Claims (5)

[Claims] 1. A flat plate-shaped ferrite member, and first, second, and second parts which are located on the ferrite member and which are provided on different planes in the vertical direction with a dielectric material sandwiched therebetween and which partially intersect each other in the vertical direction. 3 central conductor, a magnet arranged on the central conductor, a first yoke arranged so as to cover the magnet, and a first yoke arranged on the lower surface side of the ferrite member.
And a second yoke that forms a magnetic closed circuit with the yoke, and the first yoke is provided with a positioning portion that contacts the outer peripheral surface of the magnet and positions the magnet. Non-reciprocal circuit device characterized by. 2. The first yoke includes a flat plate portion on which the magnet is placed, and the flat plate portion includes a plurality of protrusions arranged along an outer peripheral surface of the magnet. The nonreciprocal circuit device according to claim 1, further comprising a positioning portion. 3. The first yoke has a flat plate portion on which the magnet is placed, and the flat plate portion is composed of a plurality of bent portions arranged on an outer peripheral surface of the magnet. The nonreciprocal circuit device according to claim 1, wherein the positioning portion is provided. 4. The first yoke has a flat plate portion on which the magnet is placed, and a pair of opposing side plate portions bent from the flat plate portion, and the side plate portion has an outer periphery of the magnet. 2. The non-reciprocal circuit device according to claim 1, wherein the positioning portion is provided which is composed of a plurality of bent portions arranged on the surface. 5. The first and second yokes have a U-shape, and are provided at a flat plate portion, a pair of opposing side plate portions bent from the flat plate portion, and positions orthogonal to the side plate portions. And a pair of opposed open parts that face each other, the side plate parts of the first and second yokes are coupled to each other, and one end of the central conductor is led out from the open part. Item 5. The nonreciprocal circuit device according to any one of items 1 to 4.