KR100582776B1 - An isolator and method of producting the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an irreversible circuit element (Isolator), wherein a strip line interposed between a ferromagnetic material and a soft magnetic material forms a soft magnetic material in a printing process and the like, and a capacitor and a resistor are formed in the dielectric substrate through a printing process and the like. A circuit device and a method of manufacturing the same can be provided.

According to the present invention, by forming a strip line and a dielectric capacitor and a resistor through a printing process, etc. in order to fabricate a non-reversible device that requires minimization, the manufacturing process of the irreversible circuit device is simplified, and the size (thickness) is minimized. A circuit element can be manufactured.

Irreversible circuits, soft magnetic material, 3-terminal strip line, dielectric capacitor

Description

Non-reversible circuit device and its manufacturing method {AN ISOLATOR AND METHOD OF PRODUCTING THE SAME}

1 is a block diagram of a system including irreversible circuitry.

2 is a circuit diagram showing a basic equivalent circuit of an irreversible circuit element.

3 is a block diagram of a conventional irreversible circuit element.

4 is a block diagram of an irreversible circuit element according to the present invention.

5 is a flow chart of forming a three-terminal strip line in the soft magnetic material according to the present invention.

6A is a top pattern diagram of the dielectric substrate according to the present invention, FIG. 6B is a bottom pattern diagram of the dielectric substrate, and FIGS. 6C and 6D are diagrams of the dielectric substrate.

Figure 7a is a perspective view of the lower case according to the present invention, Figure 7b is a cross-sectional view of the lower case of the lower case according to the present invention.

* Description of the symbols for the main parts of the drawings *

50: upper case 60: ferromagnetic material

71: soft magnetic material 72a, 72b, 72c: strip line

73a ~ 73c: insulation film 80: dielectric substrate

81a to 81c: dielectric capacitor 82: resistor

The present invention relates to an irreversible circuit device (Isolator), and more particularly, a strip line interposed between the ferromagnetic material and the soft magnetic material is formed in the soft magnetic material through a printing process, and the capacitor and the resistor through the printing process, etc. The present invention relates to a non-reciprocal circuit element and a method for manufacturing the same, which are formed on a substrate to simplify the manufacturing process of the irreversible circuit element and minimize the thickness and size of the product.

BACKGROUND ART In general, a concentrated integer irreversible circuit element (isolator) employed in a mobile communication device such as a cellular phone has an irreversible electrical characteristic in which a signal loss is small in the transmission direction and a signal loss is increased in the reverse direction. In recent years, as a mobile communication device, there is a strong demand for low cost and a low cost in terms of its use, and a non-reciprocal circuit element applied to such a mobile communication device is also required to be small, light in weight, and low in cost. .

Conventionally known non-reciprocal circuit elements are located between a power amplifier module (PAM) of a wireless device transmitter and a transmitter filter of a duplexer, and reflect signals reflected from a transmitter filter and an antenna of the duplexer. Used to protect the power amplifier module.

1 is a block diagram showing a part of a configuration of a system including an irreversible circuit element. As shown here, a transmission signal Tx is amplified by the power amplifier module 15 and then a duplexer 12 is shown. It is sent to the antenna 11 through, and sent out from the antenna (11).

In addition, the received signal Rx is power amplified with low noise in a low noise amplifier 16 after the airwaves received by the antenna 11 are filtered by a signal of a specific band by a transmitter filter of the duplexer 12. will be. That is, the irreversible circuit element 13 protects the power amplifier module 15 by reducing the reflected signal reflected from the transmitter filter of the duplexer 12 and the antenna 11.

2 is a circuit diagram showing a basic equivalent circuit of an irreversible circuit element, and FIG. 3 is a block diagram of a conventional irreversible circuit element.

As shown here, the input terminal is coupled to the output of the power amplifier module 15 of the transmission unit to receive the high frequency transmission signal TX, and the input terminal is also connected to the internal terminal 33 to input the high frequency. The transmission signal TX is transmitted to the internal terminal 33. An input capacitor C1 is connected between the input terminal and the ground.

In addition, the output terminal is connected to the internal terminal 33, and is connected to the duplexer 12, the input high-frequency signal is finally transmitted through the antenna (11).

The output capacitor C2 is also connected between the output terminal and ground. A resonance matching capacitor C3 and a terminating resistor R are connected in parallel between the internal terminal 33 and the ground. The signal transmitted from the power amplifier module 15 to the input terminal of the irreversible circuit element 13 is transmitted to the output terminal through the internal terminal 33, and the signal transmitted to the output terminal is a duplexer connected to the output terminal ( 12) It may be generated as a reflected signal due to mismatch with the transmitter filter. When the reflected signal is reversely transmitted, the irreversible circuit element 13 diffracts the reflected signal toward the termination resistor R of the internal terminal 33 and greatly reduces its intensity.

As shown in FIG. 3, the configuration of the non-reciprocal circuit element 13 includes the upper case 31, a ferromagnetic material (Sr-ferrite) 32 generating a static magnetic field, and the ferromagnetic material 32. Internal terminals connected to three strip lines 33 'connected to the input, output terminals, and isolation terminals together with a soft ferrite 42 which is positioned at the bottom to generate an induction magnetic field. (33), chip resistors 34 and three capacitors 35a to 35c connected to the three strip lines 33 'of the internal terminal 33, and a lower case into which the internal terminal 33 is inserted. 41, the chip resistor 34, three capacitors 35a to 35c, and an injection case 36 into which the input and output terminals 38 and 39 and the isolation terminal 37 are interpolated.

However, the conventional irreversible circuit element having the above-described configuration includes a ferromagnetic material 32 for generating a static magnetic field in the upper and lower cases 31 and 40 and an induction magnetic field via the internal terminal 33. The soft magnetic material 42 generated and a separate injection case 36 are formed around the lower side thereof so that the three capacitors 35a to 35c and the input and output terminals 38 and 39 and the isolation terminals 37 are horizontally formed. After arranging, by connecting them through the strip line 33 ', respectively, the size of the irreversible circuit element is large.

In addition, when the strip line 33 'of the internal terminal 33 is soldered integrally with the capacitors 35a to 35c and the input and output terminals 38 and 39, a narrow space inside the injection case 36 is formed. This leads to poor soldering, as a result, workability and assemblability of the irreversible circuit device are degraded, and a uniform state of the product cannot be obtained.

The present invention is a means for improving the conventional problems as described above, the object is to facilitate the assembly and adhesion of the respective component parts when assembling the irreversible circuit element, in order to minimize the size of the irreversible circuit elements, An irreversible circuit element that forms strip lines interposed between magnetic materials on a soft magnetic material through a printing process and the like and a dielectric capacitor and a resistor are formed on the dielectric substrate through a printing process to minimize component size and thickness of the irreversible circuit device. And to provide a method of manufacturing the same.

As a technical means for achieving the above object, the apparatus of the present invention,

A lower case having an upper case, an input, an output terminal, and an isolation terminal, a ferromagnetic material for generating a static magnetic field, a soft magnetic material for generating an induction magnetic field under the ferromagnetic material, and an upper portion of the soft magnetic material In the non-reciprocal circuit device having three conductive lines connected to the input, output terminal and the isolation terminal, and three capacitors and resistors respectively connected to the three conductive lines,

The three conductive lines are printed with three-terminal strip lines on the surface of the soft magnetic material, and the three capacitors and resistors are printed with three dielectric capacitors and resistors on the surface of the dielectric substrate located below the soft magnetic material. One end of the capacitor is respectively connected in parallel to the three-terminal strip line, and the other end of the three dielectric capacitors is respectively connected to the input, output terminal, and isolation terminal provided in the lower case, and the resistor is parallel to one of the three dielectric capacitors. It provides an irreversible circuit element, characterized in that connected.

In the non-reciprocal circuit device of the present invention having the above configuration, the three conductive lines, which have been formed by hand on a dielectric substrate, are formed on the surface of the soft magnetic body through a printing process, thereby simplifying the manufacturing process and assembly of the non-reciprocal circuit device. The size (thickness) of the irreversible circuit element can be reduced. The three-terminal strip line is formed of a conductive material. Preferably, the three-terminal strip line may be formed by printing silver (Ag) or copper (Cu).

In addition, the non-reciprocal circuit device of the present invention includes three capacitors and chip resistors for matching, which are connected in parallel to conventional input / output terminals and isolation terminals to form an equivalent circuit, and the three dielectric capacitors and the like through a printing process on a dielectric substrate. By forming the resistor, the manufacturing process of the irreversible circuit element can be simplified and its size (thickness) can be reduced.

Furthermore, the present invention can provide a method for manufacturing a nonreciprocal circuit element that simplifies the manufacturing process of the irreversible circuit element and reduces the size (thickness) of the device.

The method includes an upper case, a lower case having an input, an output terminal, and an isolation terminal, a ferromagnetic material generating a static magnetic field, a soft magnetic material located below the ferromagnetic material and generating an induction magnetic field; In the non-reciprocal circuit device manufacturing method having three conductive lines positioned on the magnetic material and connected to the input, output and isolation terminals, and three capacitors and resistors respectively connected to the three conductive lines,

Print two dielectric capacitors connected in parallel to the input terminal and the output terminal, respectively, from the upper surface of the dielectric substrate to a predetermined portion of the lower surface, and the dielectric capacitor connected in parallel to the isolation terminal and the resistor connected in parallel to the dielectric capacitor connected to the isolation terminal. Printing on the upper surface of the dielectric substrate,

Printing a three-terminal strip line having an intersection angle of approximately 120 degrees between strip lines connected to the input and output terminals on the surface of the soft magnetic material, and an intersection angle of approximately 120 degrees between strips connected to the output terminal and the isolation terminal; ,

The three dielectric capacitors of the dielectric substrate are respectively connected to the three-terminal strip line of the soft magnetic material, and the input, output terminals, and isolation terminals of the lower case are connected to the three dielectric capacitors, respectively. And soldering the ferromagnetic material, the soft magnetic material under the ferromagnetic material, and the dielectric substrate under the soft magnetic material.

FIG. 4 is a schematic diagram of an irreversible circuit element according to the present invention. Referring to FIG. 4, the present invention includes an upper case 50, input and output terminals 91 and 92, and an isolation terminal 93. As shown in FIG. One lower case 90, a ferromagnetic material 60 generating a static magnetic field, and a soft magnetic material 71 having three terminal strip lines 72a to 72c printed on the surface of the ferromagnetic material 60, which is located below the ferromagnetic material 60. And an insulation film 73a to printed on the three terminal strip lines 72a to 72c to prevent electrical short between the three terminal strip lines 72a to 72c having the laminated structure. 73c) and input, output terminals 91 and 92 and isolation terminals provided in the lower case 90 and connected in parallel to the three-terminal strip lines 72a to 72c, respectively, below the soft magnetic material 71. Three dielectric capacitors 81a to 81c and resistors 82 respectively connected to 93 include a dielectric substrate 80 printed on the surface.

In one embodiment of the present invention, the three dielectric capacitors 81a to 81c and resistors 82 formed on the dielectric substrate 80 by the printing process are capacitors 35a to 35c and chip resistors 34 which are individual components. Can be used.

Hereinafter, the components of the present invention shown in FIG. 4 will be described in more detail with reference to FIGS. 5 to 7.

5 is a flow chart of forming a three-terminal strip line in the soft magnetic material according to the present invention.

On the surface of the soft magnetic material 71 in which the three-terminal strip lines 72a to 72c are formed, a portion of the strip line may be formed on the side surface of the soft magnetic material 71 by a printing process or the like. Half-holes may be formed on the edges, and the half-holes may be formed using a through-fill process.

FIG. 6 is a configuration diagram of a dielectric substrate 80 having three dielectric capacitors and resistors formed therein, and FIG. 6A is a top pattern diagram of a dielectric substrate. Referring to FIG. 6A, three dielectric capacitors 81a to 81c and a resistor 82 are formed on the upper surface 83 of the dielectric substrate 80 through a printing process, and the resistor 82 is the dielectric capacitor ( 81c) to be connected in parallel. 6B is a lower surface pattern diagram of the dielectric substrate, wherein the dielectric capacitors 85a and 85b of the lower surface 84 are connected to the dielectric capacitors 81a and 81b of the upper surface 83, respectively. Printed along the side.

Accordingly, the dielectric capacitors 81a and 81b of the upper surface 83 are connected to the dielectric capacitors 85a and 85b of the lower surface 84, respectively, and as shown in the equivalent circuit of FIG. The capacitors 91 and 92 are formed, and the dielectric capacitor 81c and the resistor 82 form a capacitor and a resistor connected in parallel to the isolation terminal 93.

As described above, the dielectric substrate 80 having the three dielectric capacitors and the resistor is configured as shown in FIG. 6C, and FIG. 6D is a hole formed in the dielectric substrate of FIG. 6C. Like the holes of the soft magnetic material 71, the holes of the dielectric substrate 80 are filled with a conductive material so that the soft magnetic material 71 when the soft magnetic material 71 and the dielectric substrate 80 are soldered as shown in FIG. 4. The three-terminal strip line 72a to 72c of the ()) and the three dielectric capacitors 81a to 81c and the resistor 82 of the dielectric substrate 80 are connected.

Figure 7a is a perspective view of the lower case of the irreversible circuit element according to the present invention, Figure 7b is a cross-sectional view of the lower case of the lower case according to the present invention. As shown in FIGS. 7A and 7B, the lower case 90 includes input and output terminals 91 and 92 and an isolation terminal 93. That is, the lower case 90 is soldered with the dielectric substrate 80 so that the three-terminal strip lines 72a to 72c pass through three dielectric capacitors 81a to 81b and a resistor 82 to input and output terminals ( 91 and 92 and the isolation terminal 93, and as shown in FIG. 7B, a terminal is led out of a predetermined region of the lower surface 94 of the lower case 90 to the outside of the lower case 90.

Hereinafter, the method of manufacturing the irreversible circuit element of the present invention will be described.

First, the input and output terminals 91 and 92 and the isolation terminal 93 are formed in the lower case 90. The input terminal 91 is coupled to the output of the power amplifier module of the transmitter to transmit the input high frequency transmission signal Tx to the 3-terminal strip lines 72a to 72c. The output terminal 92 is connected to the input of the duplex, and finally transmits a high frequency signal input to the input terminal 91 to the antenna through the internal circuit.

Next, two dielectric capacitors 81a, 81b, 85a, 85b connected from the upper surface 83 to the lower surface 85 are printed at two of the positions that become square vertices on the dielectric substrate 80, A dielectric capacitor 81c and a resistor 82 are printed in parallel on the upper surface 83.

Next, a metal conductor is printed on the soft magnetic material 71 to form three-terminal strip lines 72a to 72c. The three terminal strip lines 72a to 72b are connected to the three dielectric capacitors 81a to 81c of the dielectric substrate 80 when soldering, and FIG. 5 is a flowchart illustrating a three terminal strip line formed on a soft magnetic material. It will be described in more detail.

First, the first terminal strip line 72a is sputtered or printed so as to cross the upper surface of the soft magnetic material 71 and each end thereof reaches a predetermined portion of the lower surface of the soft magnetic material 71, and the first terminal strip. An imide film 73a having an area smaller than the upper surface of the soft magnetic material 71 is printed on the first terminal strip line 72a so that the line 72a and the second terminal strip line 72b are insulated from each other. do.

Next, the second terminal strip line 72b is sputtered or printed like the first terminal strip line 72a so that the crossing angle with the first terminal strip line 72a becomes 120 °, and the second terminal The insulating film 73b is printed on the second terminal strip line 72b so that the strip line 72b and the third terminal strip line 72c are insulated from each other.

In addition, the third terminal strip line 72c is sputtered or printed like the second terminal strip line 72b so that the crossing angle with the second terminal strip line 72b becomes 120 °, and the third terminal strip The insulating film 73c is printed on the line 72c.

Next, the dielectric substrate 80 such that the three dielectric capacitors 81a to 81c of the dielectric substrate 80 are connected to the input, output terminals 91 and 92 and the isolation terminal 93 of the lower case 90, respectively. ) Is inserted into the lower case 90, and the three-terminal strip lines 72a to 72c formed on the soft magnetic material 71 are connected to the three dielectric capacitors 81a to 81c of the dielectric substrate 80, respectively. The soft magnetic material 71 is interpolated on the substrate 80, and the ferromagnetic material 60 is interpolated on the soft magnetic material 71.

Next, the upper case 50 and the upper case and the lower case 90 of the ferromagnetic material 60 are accommodated so that the dielectric substrate 80, the soft magnetic material 71, and the ferromagnetic material 60 are accommodated in the lower case 90. ) To the side of the.

 As described above, the present invention forms a strip line interposed between a ferromagnetic material and a soft magnetic material on a soft magnetic material through a printing process, and forms a capacitor and a resistor on a dielectric substrate through a printing process, thereby providing It has the effect of simplifying the manufacturing process and minimizing its size (thickness).

Claims (7)

A lower case having an upper case, an input, an output terminal, and an isolation terminal, a ferromagnetic material for generating a static magnetic field, a soft magnetic material for generating an induction magnetic field under the ferromagnetic material, and an upper portion of the soft magnetic material In the non-reciprocal circuit device having three conductive lines connected to the input, output terminal and the isolation terminal, and three capacitors and resistors respectively connected to the three conductive lines, The three conductive lines are printed in a three-terminal strip line on the surface of the soft magnetic material, and the three capacitors and resistors are printed in a conductor pattern on the surface of the dielectric substrate located below the soft magnetic material. One end is connected in parallel to each of the three-terminal strip line, the other end of the three dielectric capacitors are respectively connected to the input, output terminal and the isolation terminal provided in the lower case, the resistor is connected in parallel to one of the three dielectric capacitors Irreversible circuit element, characterized in that. The method of claim 1, And the three-terminal strip line is printed with a conductive material to a predetermined portion of the lower surface of the soft magnetic material. The method of claim 1, Wherein in the three capacitors and the resistor printed on the dielectric substrate, two dielectric capacitors connected to the input terminal and the output terminal are formed from a top surface of the dielectric substrate to a predetermined portion of the bottom surface thereof. The method of claim 1, And the resistor is formed on an upper surface of the dielectric substrate so as to be connected in parallel with a dielectric capacitor connected to the isolation terminal. The method of claim 1, The dielectric substrate is a non-reciprocal circuit device, characterized in that a half hole (Half Via Hole) penetrating through the upper and lower surfaces of the dielectric substrate formed with a dielectric capacitor connected to the input and output terminals. A lower case provided with an upper case, an input, an output terminal, and an isolation terminal, a ferromagnetic material for generating a static magnetic field, a soft magnetic material located under the ferromagnetic material to generate an induction magnetic field, and the input and output terminals and In the method of manufacturing an irreversible circuit device having three conductive lines connected to an isolation terminal and three capacitors and a resistor connected to each of the three conductive lines, Two dielectric capacitors connected in parallel to the input terminal and the output terminal, respectively, are printed from the upper surface of the dielectric substrate to a predetermined portion of the lower surface, and are connected in parallel with the dielectric capacitor connected in parallel to the isolation terminal and the dielectric capacitor connected to the isolation terminal. Printing the upper surface of the dielectric substrate; Printing a three-terminal strip line having an intersection angle of 120 ° between the strip lines connected to the input and output terminals on the surface of the soft magnetic material, and a crossing angle of 120 ° between the strips respectively connected to the output terminal and the isolation terminal; The three dielectric capacitors of the dielectric substrate are respectively connected to the three-terminal strip line of the soft magnetic material, and the input, output terminals, and isolation terminals of the lower case are connected to the three dielectric capacitors, respectively. And inserting and soldering the ferromagnetic material, the soft magnetic material under the ferromagnetic material, and the dielectric substrate under the soft magnetic material. According to claim 6, Sputtering or printing a three-terminal strip line on the soft magnetic material, Sputtering or printing a first terminal strip line which crosses the upper surface of the soft magnetic material and whose ends are formed to predetermined portions of the lower surface of the soft magnetic material, respectively; Printing an imide film having an area smaller than an upper surface of the soft magnetic material on the first terminal strip line formed on the upper surface of the soft magnetic material; Sputtering or printing a second terminal strip line like the first terminal strip line such that the crossing angle with the first terminal strip line is 120 °; Printing the insulating film on the second terminal strip line; Sputtering or printing a third terminal strip line such as the second terminal strip line such that the crossing angle with the second terminal strip line is 120 °; And printing the insulating film on the third terminal strip line.

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