JP3230588B2 - Non-reciprocal circuit device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lumped constant type non-reciprocal circuit device used for a non-reciprocal circuit device such as an isolator or a circulator.

[0002]

2. Description of the Related Art As the prior art of this type of non-reciprocal circuit device, for example, those described in Japanese Utility Model Publication No. Sho 62-11802, Japanese Utility Model Application Laid-Open No. 62-127107 and Japanese Utility Model Application Publication No. Sho 56-2603 are known. . The general configuration is to arrange a magnetic material such as garnet or ferrite on both sides of one non-reciprocal circuit element provided on one substrate, and further arrange a permanent magnet on the outside of the non-reciprocal circuit element to generate a DC magnetic field. The voltage is applied vertically. The non-reciprocal circuit device includes three strip conductors arranged to cross each other at an angle of 120 degrees on one substrate.

[0003]

However, the conventional nonreciprocal circuit device has the following problems. (A) Since a non-reciprocal circuit device has only one non-reciprocal circuit device, a plurality of non-reciprocal circuit devices are required to use a plurality of non-reciprocal circuit devices in order to improve the function of a circulator or an isolator. This leads to an increase in size and cost. (B) The frequency range of this type of non-reciprocal circuit device is 1.5
It is shifting from GHz to a high frequency region such as 2.4 GHz. For this reason, in the conventional center conductor in which three strip conductors are formed on one substrate, the inductance component in the used high-frequency region increases, and the characteristics deteriorate. (C) The non-reciprocal circuit element has an important use for a car phone or a cordless phone, and its miniaturization is a very important matter. Conventionally, as means for reducing the size, means for reducing the interval between the strip conductors or reducing the width of the strip conductors have been adopted. However, the distance between the strip conductors cannot be reduced below the dimension required for ensuring the creepage distance. On the other hand, when the width of the strip conductor is reduced, the inductance component and the DC resistance value are further increased in a high frequency region such as 2.4 GHz, and it is difficult to obtain satisfactory characteristics.

Accordingly, a first object of the present invention is to solve the above-mentioned conventional problems and to secure a high function substantially the same as using a plurality of non-reciprocal circuit elements without increasing the size. It is to provide a non-reciprocal circuit element that can be used.

A second object of the present invention is to provide a non-reciprocal circuit device excellent in high frequency characteristics by reducing the inductance component and the DC resistance value of the strip conductor without increasing the size.

[0006]

According to a first aspect of the present invention, there is provided a non-reciprocal circuit device having a center conductor, wherein a plurality of the center conductors are provided, each of which has an angle of about 120 degrees with respect to each other. It is characterized by having three strip conductors crossing at an angle and being arranged side by side on the same substrate.

In order to solve the second problem, each of the center conductors is provided with a plurality of sets of the three strip conductors, each set being laminated via an electric insulating layer and electrically connected in parallel with each other. It is characterized by.

[0008]

In the first means for solving the problems, a plurality of center conductors are provided, each having three strip conductors crossing each other at an angle of about 120 degrees and arranged side by side on the same substrate. By the terminal connection of, for example, configure a circuit substantially the same as cascading a plurality of non-reciprocal circuit elements, while suppressing the increase in size and cost,
The functions of the circulator and the isolator can be improved.

In each of the center conductors arranged side by side, a plurality of sets of three strip conductors are provided,
Since each set is laminated via an electrical insulating layer and electrically connected in parallel with each other, the inductance and DC resistance of the strip conductor can be reduced without increasing the plane occupied area of the strip conductor and increasing its size. And the high frequency characteristics can be improved.

[0010]

1 is a front view of a non-reciprocal circuit device according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is A1-A1 of FIG.
FIG. 4 is a sectional view taken along line A2-A2 in FIG. In the figure, N1 and N2 are center conductors. A plurality of center conductors N1 and N2 are provided, each having three strip conductors 110 to 130 and 210 to 230 crossing each other at an angle of about 120 degrees and arranged side by side on the same substrate. Therefore, each center conductor N1, N
With the two terminal connections, a circuit substantially the same as a plurality of non-reciprocal circuit devices connected in cascade can be configured, and the functions of the circulator and the isolator can be improved while suppressing an increase in size and cost. This will be described in detail later.

Each of the center conductors N1, N2 has a plurality of strip conductor sets of a first strip conductor set 1 and a second strip conductor set 2. 3 is an insulating layer, 41 to 46 are through conductors, 51 to 56 are through conductors, 61 to 64 are through conductors that are also used as holes for attaching external connection terminals, and 71 to 73 are through holes.

The first strip conductor set 1 includes an insulating substrate 1
00 is provided with three strip conductors 110 to 130 crossing each other at an angle of about 120 degrees. Second
The strip conductor set 2 has three strip conductors 210 to 230 crossing each other at an angle of about 120 degrees on the insulating substrate 200, just like the first strip conductor set 1.
Is provided. Although two combinations of the first strip conductor set 1 and the second strip conductor set 2 are shown in the drawing, more combinations are possible.

The strip conductors 110 to 130 constituting the first strip conductor set 1 and the strip conductors 210 to 230 constituting the second strip conductor set 2 are laminated via an insulating layer 3 and are electrically parallel to each other. It is connected to the. Therefore, the strip conductor 1
10 and the strip conductor 210, the strip conductor 120 and the strip conductor 220, and the strip conductor 130 and the strip conductor 230 are electrically connected in parallel to each other. For this reason, the cross-sectional area of the strip conductor constituting the center conductor increases in proportion to the number of layers, the inductance component and the DC resistance value decrease, and the high-frequency characteristics improve.

Moreover, since the strip conductors 110 to 130 and the strip conductors 210 to 230 are laminated with the insulating layer 3 interposed therebetween, their thickness slightly increases, but the occupied area in the plane hardly increases. If the operating frequency is relatively low and it is not necessary to reduce the inductance component and the DC resistance, the conductor width of the strip conductors 110 to 130 and the strip conductors 210 to 230 or the arrangement interval between the strip conductors can be reduced. The size can be reduced.

Each of the strip conductors 110 to 130 is divided into two on the front surface and the back surface of the substrate 100, and divided into pieces 111-112, 121-122 and 131-13.
2-132 is made conductive by through conductors 41-46. For example, when focusing on the strip conductor 110, the divided piece 111 on the front side of the substrate 100 and the divided piece 112 on the back side
And a through conductor 4 is provided between the two divided pieces 111-112.
1 and 42 are made conductive. Other strip conductors 12
The same applies to the reference numerals 0 and 130, namely, the divisional pieces 121 or 131 on the front side of the substrate 100 and the divisional pieces 122 or 1 on the rear side.
32, and these are connected by through conductors 43 and 44, and the divided pieces 131-13 of the strip conductor 130 are separated.
The two are connected by through conductors 45 and 46.

Similarly to the strip conductors 110 to 130, the strip conductors 210 to 230 are also divided into two on the front surface and the back surface of the substrate 20, and are divided into two pieces 211-212 and 22.
1-22 and 231-232 are conducted by through conductors 51-56. Divided pieces 212, 222, 232
Has an arrangement pattern similar to that of FIG.

The strip conductor 110 and the strip conductor 210 are conductively connected by the through conductors 61 and 62, the strip conductor 120 and the strip conductor 220 are connected by the through conductor 63, and the strip conductor 130 and the strip conductor 230 are connected by the through conductor 64. Conducted connection. Thereby, the first strip conductor set 1 and the second strip conductor set 1
Are electrically connected in parallel via the insulating layer 3.

Each of the strip conductors 110 to 130 and the strip conductors 210 to 230 is arranged such that a portion adjacent to a land formed around the through conductor in another strip conductor keeps a predetermined distance from the land. It has a curved arc shape. Therefore, the strip conductors 110 to 130 and the strip conductors 210 to 23
A sufficient creepage distance between the land and other strip conductors can be ensured while reducing the overall arrangement of the zeros.

FIG. 5 is a block diagram of a transmission / reception apparatus using the non-reciprocal circuit device according to the present invention. In the figure,
8 is a non-reciprocal circuit device according to the present invention, 9 is a transmitter, 10 is a receiver, 11 is an antenna, and 12 is a dummy resistor. Although not shown, a non-reciprocal circuit device 8 based on a well-known technique is used.
On both sides or one side, to place the magnetic material such as garnet or ferrite, further permanent magnets arranged on the outside, is applied perpendicularly a DC magnetic field. It is also known to connect a capacitor or inductor for impedance adjustment to each terminal of the non-reciprocal circuit device. The center conductor N1 has the through terminal 63 connected to the output terminal of the transmitter 9, and the through terminal 6
1, 62 are grounded via the dummy resistor 12, and the through terminal 64 is connected to the through terminal 63 of the central conductor N2.
In the center conductor N2, the through terminals 61 and 62 are connected to the receiver 10, and the through terminal 64 is connected to the antenna 11.
The transmission signal ST transmitted from the transmitter 9 is transmitted through the center conductor N1 and the center conductor N2 as shown by arrows, and is radiated from the antenna 11. The reception signal SR received by the antenna 11 is rotated by the center conductor N <b> 2 in the direction from the through terminal 64 to the through terminals 61 and 62, and is received by the receiver 10. As a result, a circuit substantially similar to a plurality of non-reciprocal circuit elements connected in cascade can be configured, and the functions of the circulator and the isolator can be improved while suppressing an increase in size and cost.

FIG. 6 is a front view showing another embodiment of the non-reciprocal circuit device according to the present invention, FIG. 7 is a plan view of the same, or a cross-sectional view taken along line A5-A5 of FIG. 6, and FIG.
FIG. 9 is a cross-sectional view taken along line A3 or A6-A6.
FIG. 7 is a sectional view taken along line A4-A4 or line A7-A7 in FIG. In this embodiment, an example is shown in which strip conductors are separated and formed on a substrate, and the substrates are sequentially laminated. First, each of the first strip conductor sets 1 of the center conductors N1 and N2 includes a substrate 101 on which a strip conductor 110 is formed (see FIG. 7), a substrate 102 on which a strip conductor 12 is formed (see FIG. 8), and a strip conductor. The substrate 103 (see FIG. 9) on which is formed the strip conductor 1
The layers are sequentially laminated so that 10 to 130 cross each other at an angle of 120 degrees. The second strip conductor set 2 also includes a substrate 201 on which the strip conductor 21 is formed (see FIG. 7), a substrate 202 on which the strip conductor 22 is formed (see FIG. 8),
And a substrate 203 (FIG. 9) on which the strip conductor 23 is formed.
), The strip conductors 210 to 230 are 12
The layers are sequentially laminated so as to cross at an angle of 0 degrees. Then, the three strip conductors 110 to 130 and the second strip conductor set 2 constituting the first strip conductor set 1
Are electrically connected in parallel to each other by the through conductors 61 to 64. Strip conductors 110 to 130, 210 to 230
Are substrates 101 to 103 and 201 to 2
03 is laminated as an electrical insulating layer.

In the embodiment shown in FIGS.
The same operation and effect as described with reference to FIG. 5 are obtained.

[0022]

As described above, according to the present invention, the following effects can be obtained. (A) A plurality of center conductors are provided, each having about 1
Since three strip conductors intersecting at an angle of 20 degrees are arranged side by side on the same substrate, substantially the same circuit as connecting a plurality of non-reciprocal circuit elements in cascade by terminal connection of each center conductor. And it is possible to provide a non-reciprocal circuit device having substantially the same advanced function as using a plurality of non-reciprocal circuit devices while suppressing an increase in size and cost. (B) Each of the center conductors is provided with a plurality of sets of three strip conductors, and each set is stacked via an electric insulating layer and electrically connected in parallel with each other, which leads to an increase in size. In addition, it is possible to provide a non-reciprocal circuit device having excellent high frequency characteristics by reducing the inductance component and the DC resistance value of the strip conductor.

[Brief description of the drawings]

FIG. 1 is a front view of a non-reciprocal circuit device according to the present invention.

FIG. 2 is a plan view of the non-reciprocal circuit device according to the present invention.

FIG. 3 is a sectional view taken along line A1-A1 in FIG.

FIG. 4 is a sectional view taken along line A2-A2 in FIG.

FIG. 5 is a block diagram of a transmission / reception device using the non-reciprocal circuit device according to the present invention.

FIG. 6 is a front view showing another embodiment of the non-reciprocal circuit device according to the present invention.

7 is a plan view of the nonreciprocal circuit device shown in FIG. 6 or a cross-sectional view taken along line A5-A5 in FIG.

8 is a cross-sectional view taken along line A3-A3 or line A6-A6 in FIG.

FIG. 9 is a cross-sectional view taken along line A4-A4 or line A7-A7 in FIG. 6;

[Explanation of symbols]

 N1, N2 Central conductor 1 First strip conductor set 2 Second strip conductor set 3 Insulating layer 110, 120, 130 Strip conductor 210, 220, 230 Strip conductor

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Ino 1-13-1 Nihonbashi, Chuo-ku, Tokyo Inside TDK Corporation (56) References JP-A-57-61314 (JP, A) JP-A Sho 62-258503 (JP, A) JP-A-2-290301 (JP, A) JP-A-2-24602 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01P 1/22 -1/397

Claims (4)

(57) [Claims] 1. A non-reciprocal circuit device in which a magnetic material such as garnet or ferrite is arranged on both sides or one side of a center conductor, and a permanent magnet is further arranged outside the same. Arrange horizontally on the board
It is, each of said side by side arranged the central conductor, each other
A plurality of sets of three strip conductors intersecting at an angle of about 120 degrees are provided, and each set of three strip conductors is laminated via an electrical insulating layer, and a through conductor penetrating through the insulating layer is provided. Are electrically connected in parallel with each other, and the central conductors arranged side by side are further electrically connected to each other in series via one of the through conductors . The rest are non-reciprocal circuit elements that constitute external connection terminals. 2. The non-reciprocal circuit device according to claim 1, wherein each of the central conductors arranged side by side includes a first strip conductor set, a second strip conductor set,
It includes a first insulating substrate and a second insulating substrate, and each of the three strip conductors belonging to the first strip conductor group is divided into a front surface and a back surface of the first insulating substrate. The divided strips are arranged to be conductive by a through conductor penetrating the first insulating substrate, and three strip conductors belonging to the second strip conductor set have two strip conductors on the front surface and the back surface of the second insulating substrate. It is divided and arranged, and the divided pieces are conducted by a penetrating conductor penetrating the second insulating substrate, and the first insulating substrate and the second insulating substrate are stacked via an insulating layer. Non-reciprocal circuit device. 3. The non-reciprocal circuit device according to claim 1, wherein each of the central conductors arranged side by side has the three strip conductors formed on a different insulating substrate for each strip conductor. Non-reciprocal circuit elements that are laminated. 4. The non-reciprocal circuit device according to claim 3, wherein each of the central conductors arranged side by side includes a first strip conductor set and a second strip conductor set. Wherein each of the three strip conductors belonging to the first strip conductor set is formed on a different insulating substrate for each strip conductor and sequentially laminated, and the three strip conductors belonging to the second strip conductor set The strip conductors are formed on different insulating substrates for each strip conductor and are sequentially laminated, and the first strip conductor set and the second strip conductor set are laminated on each other and penetrate the insulating substrate. Non-reciprocal circuit elements electrically connected in parallel with each other by through conductors.