JPH0715213A - Irreversible circuit element - Google Patents

Abstract

PURPOSE:To provide an irreversible circuit element which can exactly set the cross angle of center conductors and can easily adjust characteristics after manufacture. CONSTITUTION:The center conductors mutually crossed at 120 deg. are composed of conductor patterns printed and formed at the respective layers of a liminated substrate 11, and the peripheral edge part of the laminated substrate 11 is provided with electrodes 114-119 connected to the terminal parts of the respective central conductors. Further, an opening part 13a is formed at the center part of a dielectric substrate 13 provided with an area wider than the laminated substrate 11, and conductor patterns 134-136 through-hole-connected to conductor patterns 131-133 to be the electrodes of conductors and a conductor pattern 130 for grounding formed on the rear face are formed on the surface, and the electrodes 114-119 are soldered to the conductor patterns 131-136. Further a conductor board 14 is arranged under the dielectric substrate 13, a ferrite core is arranged at the opening part 13a, a permanent magnet is arranged on the laminated substrate 11, and they are housed in a shield case.

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 that can be finely adjusted.

[0002]

2. Description of the Related Art Conventionally, non-reciprocal circuit elements such as circulators and isolators have a characteristic of transmitting electric power only in a predetermined specific direction and not transmitting electric power in the reverse direction.
Utilizing this characteristic, for example, a circulator is used as a multi-frequency demultiplexer combined with a transmission / reception demultiplexer and a filter circuit, and an isolator is used for impedance matching in a high-frequency circuit, transistor protection of an amplifier, etc. .

A configuration example of a conventional circulator will be described with reference to FIGS. The circulator element shown in FIGS. 2 and 3 includes a substrate 3 made of resin or ceramic in which an opening 3a for inserting the ferrite 1 and the mesh-shaped central conductor 2 is formed, and a conductor formed on the substrate 3 It is configured by combining a capacitance composed of the patterns 3b, 3c and 3d and an inductor composed of the central conductor 2.

In this assembly, the ferrite 1 is surrounded by the central conductors 2 forming an inductor as shown in FIG. 3, and at this time, the insulating films 4a, 4a are formed so that the central conductors intersecting at an angle of 120 degrees do not come into conductive contact with each other. 4b is interposed. The ferrite 1 wrapped in the central conductor 2 is the substrate 3
Of the center conductor 2 and the three input / output electrodes 2a to 2c of the central conductor 2 are connected to the conductor patterns 3b to 3d which are the capacitor electrodes on the substrate 1. Furthermore, the center conductor 2
The board 3 is housed in the shield case 5. here,
A conductor pattern (not shown) for grounding is formed on one surface of the back surface of the substrate 3, and the conductor pattern is used as the shield case 5.
Have been touched. As a result, a circulator composed of inductors L1 to L3 and capacitors C1 to C3 as shown in the circuit diagram of FIG. 4 is configured.

Further, in the circulator element shown in FIGS. 5 and 6, a central conductor forming an inductor and a capacitor connected to the central conductor are constituted by conductor patterns formed on each layer of the laminated substrate 6, and a ferrite is formed on the conductor pattern. 7
And the conductor plate 8 are combined. The circuit of this circulator is similar to that shown in FIG.

The laminated substrate 6 is composed of three insulating resin sheets 61.
5 to 63, conductor patterns forming a central conductor and a capacitor are formed on the front surface and the back surface of each sheet, as shown in FIG. That is, the first sheet 6
A grounding electrode 611 is formed on the back surface of No. 1, and three ground electrodes 612 to 614 electrically connected to the grounding electrode 611 through a through hole and a central conductor 615 having one end connected to one ground electrode 613 on the front surface. And a capacitance forming electrode 616 connected to the other end of the center conductor 615. Three ground electrodes 621 to 623 are formed on the back surface of the second sheet 62 corresponding to the ground electrodes 612 to 614 of the first sheet 61, and three ground electrodes 621 to 623 are formed on the front surface of the second sheet 62. The ground electrodes 624, 625 are formed, and the center conductor 626 having one end connected to the ground electrode 625 and the capacitance forming electrode 627 connected to the other end of the center conductor 626 are also formed. Further, ground electrodes 631 and 632 corresponding to the ground electrodes 624 and 625 are formed on the back surface of the third sheet 63, and ground electrodes 631 and 632 are formed on the front surface thereof, and ground electrodes 633 are formed on the front surface through the through holes and are connected to the ground electrode 631. A center conductor 634 having one end connected to the ground electrode 633 and a capacitance forming electrode 635 connected to the other end of the center conductor 634 are formed. Here, the central conductors 615, 626, 634 are formed so as to intersect with each other at a crossing angle of 120 degrees.

As a result, the crossing angle of the central conductor is 120
The capacitor can be formed evenly and the capacitor can be formed in a small size because the capacitor is integrally formed on the laminated substrate 6.

[0008]

However, the conventional circulator element described above has the following problems. That is, in the former configuration, the accuracy of bending the central conductor when wrapping the ferrite 1 is deteriorated, and it is very difficult to set the crossing angle of the central conductor to 120 degrees. Therefore, a sufficient circulator is used. It was difficult to get the characteristics. Also, in the latter configuration,
Since the central conductor and the capacitor are integrally formed on the laminated substrate, the circulator characteristics cannot be adjusted after manufacturing, and sufficient characteristics may not be obtained.

In view of the above problems, it is an object of the present invention to provide a non-reciprocal circuit device in which the crossing angle of the central conductors can be set accurately and the characteristics can be easily adjusted after manufacturing.

[0010]

In order to achieve the above-mentioned object, the present invention comprises a central conductor portion composed of three central conductors intersecting at 120 degrees, and a magnetic body facing the central conductor portion.
In a non-reciprocal circuit device including a plurality of capacitors connected to the other end of each of the central conductors, at least three layers are formed, and a conductor pattern forming the central conductor is formed in each layer and A laminated substrate having a predetermined area in which electrodes connected to the end of the conductor pattern are formed at a predetermined position, and an opening having a predetermined area wider than the laminated substrate and having a predetermined area narrower than the laminated substrate are formed. As well as
A capacitor-formed substrate on which a conductor pattern that forms at least one electrode of each capacitor is formed on the surface, and a connection conductor pattern that is connected to an electrode of the laminated substrate is formed at a predetermined position around the opening. And the electrode of the laminated substrate is connected to the connection conductor pattern by stacking the laminated substrate on the opening of the capacitor forming substrate, and the magnetic body is arranged in the opening facing the laminated substrate. We propose a non-reciprocal circuit device.

[0011]

According to the present invention, each of the three central conductors is formed by a conductor pattern on each layer of the laminated substrate, and both ends of each central conductor are connected to the electrodes formed on the peripheral portion of the laminated substrate. As a result, the crossing angle of each center conductor is 120
It is set to every. In addition, an opening having a predetermined area narrower than that of the laminated substrate is formed on the capacitor forming substrate, and a conductor pattern forming at least one electrode of the capacitor connected to the central conductor is formed on the surface. Further, a conductor pattern for connection to be connected to an electrode of the laminated substrate is formed at a predetermined position around the opening of the capacitor forming substrate, and the laminated substrate is stacked on the opening to connect the electrode of the laminated substrate and the connection. The conductor pattern is connected, and a magnetic material is arranged in the opening facing the laminated substrate. As a result, the central conductor and the capacitor are connected. Further, since the area of the capacitor forming substrate is set larger than the area of the laminated substrate, at least one electrode of the capacitor is exposed on the surface and can be trimmed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a circulator element according to an embodiment of the present invention. In the figure, 11 is a laminated substrate, 1
2 is a ferrite core, 13 is a dielectric substrate, and 14 is a conductor plate.

The laminated substrate 11 is a dielectric substrate 13 described later.
Has a slightly larger area than the opening 13a, and is formed into a rectangular parallelepiped shape by laminating three layers of ceramic thick film sheets (hereinafter referred to as sheets) 111 to 113 as shown in FIG. Conductor patterns 111a, 112a forming the central conductor,
113a is formed by printing. Here, the crossing angle of each conductor pattern 111a, 112a, 113a is set to 120 degrees, and the end of each conductor pattern 111a, 112a, 113a has a laminated substrate 1
Connection electrodes 11 formed from the side surface of 1 to the front and back surfaces
Conductive connection to 4-119.

The dielectric substrate 13 has a rectangular shape having an area larger than that of the laminated substrate 11, and a circular opening 13a for ferrite insertion is formed in the center thereof. Furthermore, the electrode 114 of the laminated substrate 11 is surrounded by the opening 13a.
Conductor patterns 131 to 133 which are one of the electrodes of the capacitor and conductor patterns 134 to 136 which are lands for connection are formed at positions connectable to the electrodes 119 to 119. Although not shown in the figure, a conductor pattern 130 for grounding is formed on the front surface of the dielectric substrate 13 on the front surface thereof, and conductively connected to the conductor patterns 134 to 136 on the front surface through through holes 137 to 139.

The conductor plate 14 has the same shape as the dielectric substrate 13, and an opening 14a having the same shape as the opening 13a is formed in the center thereof.

At the time of assembly, the dielectric substrate 13 is placed on the conductor plate 14. At this time, the conductor pattern 130 for grounding on the back surface of the dielectric substrate 13 and the conductor plate 14 are conductively contacted. Then, the openings 1 of the dielectric substrate 13 and the conductor plate 14
The ferrite core 12 is inserted into 3a and 14a, and the laminated substrate 11 is placed on the dielectric substrate 13 so as to face the upper surface of the ferrite core 12. At this time, each electrode of the laminated substrate 11
114 to 119 are placed so as to correspond to the positions of the conductor patterns 131 to 136, and the electrodes 114 to 119 are connected to the conductor patterns 131 to 136, respectively.
Solder to ~ 136. Further, permanent magnets (not shown) are stacked on the laminated substrate, and the whole of them is housed in a shield case (not shown).

As a result, the inductor L1 shown in the circuit diagram of FIG. 4 is constituted by the conductor pattern 111a, the inductor L2 is constituted by the conductor pattern 112a, the inductor L3 is constituted by the conductor pattern 113a, and the capacitor C1 is constituted by the conductor pattern 130,
131, the capacitor C2 is composed of the conductor patterns 130 and 132, and the capacitor C3 is composed of the conductor patterns 130 and 133, respectively.

According to the above-mentioned structure, since the central conductor is formed by printing on each of the layers 111 to 113 of the laminated substrate 11 by the conductor pattern, the intersecting angles of the central conductor can be set uniformly at 120 degrees, and the setting accuracy can be set. In addition, since only the central conductor is printed on the laminated substrate 11 to form a through hole or an electrode for forming a capacitance, which requires high forming position accuracy, strict positioning and an electrode area are required. The complexity of adjustment is eliminated.

Further, the dielectric substrate 1 in which the laminated substrate 11 is laminated
Conductor pattern that constitutes the electrode of the capacitor on the surface of 3
Since 131 to 133 are exposed, the capacitance of the capacitor can be easily adjusted by trimming the conductor patterns 131 to 133 after assembly and production, and the element characteristics can be adjusted.

Further, the main constituent parts of the circulator of this embodiment are the laminated substrate 11, the ferrite core 12, the dielectric substrate 13, the conductor plate 14 and the permanent magnet, and the number of parts can be reduced as compared with the prior art, and the cost is reduced. Also, the size of the element can be reduced.

In this embodiment, the circulator element is formed as the non-reciprocal circuit element, but the present invention is not limited to this, and as is well known, the isolator element may be formed in substantially the same manner only by adding a resistor. The same effect can be obtained.

Further, the configuration of this embodiment and the shape of each component are merely examples, and the present invention is not limited to this, and may be appropriately modified according to the application.

[0023]

As described above, according to the present invention, 3
Since one center conductor is formed by a conductor pattern on each layer of the laminated board, the accuracy of the crossing angle of the center conductor is improved, and since only the center conductor is printed on the laminated board, through-hole connection and electrostatic Strict positioning such as capacitance setting and complexity of electrode area adjustment are eliminated. Further, since at least one electrode of the capacitor is exposed on the surface of the capacitor forming substrate on which the laminated substrate is placed and trimming can be performed, it is possible to easily adjust the capacitance of the capacitor after manufacturing, and Fine adjustments can be made. Further, since the element can be constituted by the laminated substrate, the capacitor forming substrate and the magnetic material, the number of parts can be reduced as compared with the conventional case, and the cost and the size of the element can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a circulator according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a conventional circulator.

FIG. 3 is a diagram showing a surrounding structure of a central conductor and ferrite in a conventional example.

FIG. 4 is a circuit diagram showing a circulator.

FIG. 5 is a configuration diagram showing another example of a conventional circulator.

FIG. 6 is a configuration diagram showing a laminated substrate in a conventional example.

FIG. 7 is a configuration diagram showing a laminated substrate in one embodiment of the present invention.

[Explanation of symbols]

11 ... Laminated substrate, 111-113 ... Sheet, 111a, 112a, 113a
... Conductor pattern (center conductor), 114 to 119 ... Electrodes, 12
... Ferrite core, 13 ... Dielectric substrate, 13a ... Opening, 131-133 ... Conductor pattern (electrode for capacitor), 134-136 ... Conductor pattern (land for connection),
14 ... Conductor plate.

Claims (1)

[Claims] 1. A central conductor portion composed of three central conductors intersecting at 120 degrees, and a magnetic body facing the central conductor portion.
A nonreciprocal circuit device including a plurality of capacitors connected to the other end of each of the central conductors, wherein the nonreciprocal circuit element has at least three layers, and a conductor pattern forming the central conductor is formed in each layer and A laminated substrate having a predetermined area in which electrodes connected to the end of the conductor pattern are formed at a predetermined position, and an opening having a predetermined area wider than the laminated substrate and smaller than the laminated substrate are formed. And a conductor pattern that forms at least one electrode of each capacitor is formed on the surface, and a connection conductor pattern that is connected to the electrode of the laminated substrate is formed at a predetermined position around the opening. A formation substrate, the laminated substrate is overlaid on the opening of the capacitor formation substrate to connect the electrode of the laminated substrate and the conductive pattern for connection, and A nonreciprocal circuit device, wherein the magnetic material is arranged in the opening so as to face a layer substrate.