KR100270071B1 - Non-reciprocal circuuit and manufacturing method thereof - Google Patents

Abstract

PURPOSE: An isolator and a manufacturing method thereof are provided to reduce insertion loss, reduce manufacturing cost, a number of process, and improve productivity by bending a protrusion part which is protruded on a cover case, fixing a permanent magnet with the protrusion and applying a uniform direct current magnetic field to a garnet ferrite. CONSTITUTION: An isolator includes a body case(51), a garnet ferrite(55), a capacitor(52), a resistance(53), an internal terminal(54), a magnet(57), and a cover case(58). The isolator is inserted between a power amp module and an antenna switch to transfer a signal output from the power amp module to the antenna switch, and absorbs a signal reflected from the antenna switch to protect the power amp module. A permanent magnet generates a positive magnetic field and applies the same to the garnet ferrite. A plurality of protrusion parts are formed on both opposite sides of the cover case. The cover case is coupled on an upper side of the body case on which the garnet ferrite is installed. The protrusion parts are bent toward the permanent magnet in a state that the permanent magnet is installed on a bottom surface of the cover case and then the permanent magnet is fixed. The permanent magnet is circular or quadrangular shaped in a plane view.

Description

Irreversible device and its manufacturing method

The present invention relates to an irreversible element (ISOLATOR), in particular to form a protrusion on the cover case to prevent the flow of permanent magnets that generate a static magnetic field is inserted into the cover case and the permanent magnet by bending the protrusion inwards It relates to an irreversible device for fixing the and a method of manufacturing the same.

FIG. 1 is a block diagram showing a part of a system including a non-reciprocal element, and as shown here, a low pass filter (LOW) after the transmission signal Tx is amplified by a power amplifier module 15. PASS FILTER 14 is filtered and sent to the antenna 11 through the antenna switch 12 and sent out from the antenna (11). The reception signal Rx receives the airwaves from the antenna 11 and filters the signals of a specific frequency band from the band pass filter 16 through the antenna switch 12. In general, the irreversible element 13 is inserted between the power amplifier module 15 and the antenna switch 12 of the wireless device to absorb the signal source reflected from the antenna switch 12 to protect the power amplifier module 15. .

FIG. 2 is a circuit diagram showing a basic equivalent circuit of an irreversible element. As shown here, an input terminal is coupled with an output of a power amplifier module 15 of a transmission unit so that a high frequency transmission signal Tx is input and an input terminal is also provided. The high frequency transmission signal Tx input and connected to the internal terminal 22 is transmitted to the internal terminal 22. An input capacitor C1 is connected between the input terminal and ground. The output terminal is connected to the internal terminal 22 and the output terminal is connected to the antenna switch 12 so that 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 ground capacitor C3 and a terminating resistor R of 50 Ω are connected in parallel between the internal terminal 22 and the ground. The signal transmitted from the power amplifier module 15 through the input terminal and transmitted to the output terminal through the internal terminal transfers the signal from the antenna switch 12 connected to the output terminal to return to the input unit. Sink to ground through terminating resistor (R). Therefore, the irreversible element 13 removes the carrier power to prevent the power amplifier module 15 from being damaged by the power of the signal being conveyed, thereby protecting the power amplifier module 15.

3 is a block diagram illustrating a detailed structure of a conventional irreversible device. As shown here, the structure of the device includes a body case 31 in which a ground terminal 311 and an input / output terminal 312 are formed, A capacitor 32 coupled to the terminal, a terminating resistor 33 forming a ground resistance, an internal terminal 34 for transmitting a signal of an input terminal to an output terminal and sinking a carrier signal of the output terminal to the ground terminal; Resin supporting the permanent magnet 37 generating a static magnetic field, GARNET FERRITE 35 serving as a micro device, and the permanent magnet 37 and GARNET FERRITE 35 up and down. The case 36 and the cover case 38 are comprised.

The irreversible elements are combined in an electromagnetic relationship and require high insertion loss and low insertion loss in the high frequency region. In particular, since the irreversible element is driven as an irreversible element in accordance with the uniformity of the static magnetic field generated by the permanent magnet and the magnetic structure of the garnet ferrite, which is magnetically saturated, the positional flow of the permanent magnet and the garnet ferrite has a great influence in the high frequency magnetic field. Crazy 4 illustrates a method of fixing a permanent magnet to a cover case, in which (a) uses an adhesive resin and (b) forms a bent portion in the cover case. The method of fixing the permanent magnet to the cover case by forming a bent portion as shown in FIG. 4 (b) is described in Japanese Patent Application Laid-Open No. 7-326908, in order to obtain a uniform magnetic force distribution in garnet ferrite. The permanent magnet is fixed to the cover case by forming a bent portion so that the permanent magnet can be inserted into the cover case. As shown in (a) of FIG. 4, there is no bend as shown in (b) of FIG. 4, and a permanent magnet is fixed to the cover case using an adhesive resin to obtain a uniform magnetic force.

When the permanent magnet is fixed by forming a bent portion on the cover case, the thickness of the cover case is 0.5 mm or less on average, and the thickness of the permanent magnet is generally 1 mm or less, so processing of the cover case is difficult. In addition, due to the slimmer product, the thickness of the device may be limited to a certain limit, and even if the bent portion is processed in the cover case, since the bent portion is low, it is difficult to fix the permanent magnet in place. In particular, even when the permanent magnet is inserted into the cover case by inserting the permanent magnet, since the permanent magnet is disposed in the downward direction, there is a problem that the adhesive must be additionally fixed.

The present invention is to solve such a conventional problem, an object of the present invention is to insert a permanent magnet generating a static magnetic field by applying a uniform DC magnetic field to the garnet ferrite by bending and fixing the protrusion formed to protrude into the cover case It is to provide an irreversible device with a low loss of INSERT LOSS.

In addition, an object of the present invention is to provide a method of manufacturing a non-reversible device that can reduce the manufacturing cost and shorten the process by fixing a permanent magnet generating a static magnetic field by bending a plurality of protrusions formed on both sides of the cover case to reduce the production cost It is.

1 is a block diagram showing some components of a system including an irreversible element (ISOLATOR).

2 is a circuit diagram showing a basic equivalent circuit of the irreversible device.

3 is a block diagram showing the detailed structure of a conventional irreversible device.

4 is a view illustrating a method of fixing a permanent magnet to a cover case, in which a is used an adhesive resin, and b is a curved portion formed in the cover case.

5 is a configuration diagram showing the configuration of the irreversible device according to the present invention.

6 is a plan view showing a cover case of the present invention.

7 is a front view showing the step of fixing the permanent magnet to the cover case shown in Figure 6, a is a cover case, b is a state where the permanent magnet is inserted into the cover case of a, c is a cover of the The protrusion installed on the case is shown to be bent toward the inserted permanent magnet of b degree.

FIG. 8 is a front view of each drawing of FIG. 7, as shown in FIG. 7, in which a is a cover case, b is a permanent magnet inserted into a cover case of a, and c is a protrusion provided in the cover of FIG. Figure b shows the bend toward the inserted permanent magnet of b degree.

FIG. 9a shows the shape of a fixed permanent magnet, and FIG. B shows the shape of a rectangular permanent magnet.

* Explanation of symbols for main parts of the drawings

51: body case 511: ground terminal

512: input / output terminal 52: capacitor

53: earth resistance 54: internal terminal

55: GARNET FERRITE 57: permanent magnet

58: cover case 59: auxiliary terminal

In order to achieve the above object, the present invention is inserted between the power amplifier module and the antenna switch of the wireless device to transfer the signal output from the power amplifier module to the antenna switch and absorbs the signal reflected from the antenna switch to the power An irreversible device for protecting an amplifier module, comprising: a permanent magnet generating a magnetic field and applied to a garnet ferrite, and having a plurality of protrusions formed on opposite sides of each other, and coupled to an upper side of a body case in which the garnet ferrite is installed. And a cover case, and the protrusion is bent to the permanent magnet side in a state in which the permanent magnet is installed on the bottom surface of the cover case to fix the permanent magnet.

In order to achieve the above object, the present invention is inserted between the power amplifier module and the antenna switch of the wireless device to transfer the signal output from the power amplifier module to the antenna switch and absorbs the signal reflected from the antenna switch In the manufacturing method of the irreversible device to protect the power amplifier module,

(1) installing a permanent magnet generating a static magnetic field inside the cover case,

(2) fixing the permanent magnets installed in the step (1) to the cover case by bending the protrusions formed on opposite sides of the cover case toward the permanent magnet.

Hereinafter, the configuration and operation of the embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

5 is a configuration diagram showing the configuration of the irreversible device, as shown here, a non-reversible device is inserted between the power amplifier module and the antenna switch of the wireless device to transfer the signal output from the power amplifier module to the antenna switch and the antenna switch Body case 51, garnet ferrite 55, capacitor 52, ground resistance 53, internal terminal 54, permanent magnet 57, cover to absorb the signal reflected from the power amplifier module to protect The case 58 and the auxiliary terminal 59 are provided.

The body case 51 is provided with an input / output terminal 512 and a ground terminal 511 so that the input terminal is coupled with the output of the power amplifier module of the transmitter to receive the input high frequency transmission signal Tx into the internal terminal 54. To pass. The output terminal is connected to the input of the antenna switch and receives the high frequency signal input through the input terminal through the internal terminal 54 and finally transmits to the antenna. An auxiliary terminal 59 for supporting the inner terminal 54 at a predetermined height from the body case 51 is installed at an upper portion of the body case 51. As shown in FIG. Above).

Auxiliary terminals 59 installed on the inside of the body case 51 include three rectangular or circular bottom surfaces and three vertically perpendicular to the bottom surfaces at positions of vertices of equilateral triangles centered on the center of the bottom surface. It is composed of a terminal serves to support the inner terminal 54 to be located at a certain height from the body case 51.

The garnet ferrite 55, which is mounted inside the auxiliary terminal 59 and serves as a micro device, is surrounded by three terminals of the auxiliary terminal 59 mounted on the lower surface of the body case 51. The three terminals of the terminal 59 prevent the flow of the garnet ferrite 55 so that it is always present in the uniform sperm generated by the magnet. In addition, three terminals vertically formed on the circular bottom surface of the auxiliary terminal 59 form a bent portion in the middle, so that the garnet ferrite 55 positioned between the auxiliary terminal 59 and the inner terminal 54 is an auxiliary terminal. By 59, not only the flow in the horizontal direction can be prevented, but also the flow in the vertical direction can be prevented.

An input / output capacitor 52 is connected between the input / output terminal 512 and ground, respectively, and a ground capacitor 52 and a ground resistor 53 of 50Ω are connected in parallel to the ground terminal 511.

The inner terminal 54 is formed using three circular FPC (FLEXIBLE PRINTED CIRCUIT) substrates so that the three printed conductors printed in the radial direction have a cross angle of 120 degrees to each other. A first connection part is provided which is connected to the mounted auxiliary terminal 59, and the other end part is provided with a second connection part which is connected to a terminal formed in the body case 51. The first connector is connected to each of the three terminals perpendicular to the bottom of the auxiliary terminal 59 by soldering, and the second connector is also soldered to the input / output terminal and the ground terminal of the body case 51. The second connection part installed on the lead of the path through which the signal is input is directly connected to the input terminal of the input capacitor and the body case by soldering, and the second connection part installed on the lead on the path through which the signal is output is output of the output capacitor and the body case. The second connector is directly connected to the terminal by soldering, and is connected to the ground terminal through a ground capacitor and a ground resistor connected in parallel to the second connection part installed on the conductor on the path for sinking the signal reflected from the output terminal.

The upper portion of the inner terminal 54 is provided with a permanent magnet (57) generating a static magnetic field to surround the permanent magnet with a cover case (58). Figure 6 is a plan view of a cover case provided with a protrusion for fixing a permanent magnet. As shown here, a plurality of protrusions 681 are formed on opposite sides 682 of the cover case, respectively, so that the permanent magnets are fixed to the cover case by bending downward in the direction in which the protrusions 681 face each other. I would have to. The protrusion 681 may form the protrusion without additional processing for processing the protrusion by generating the protrusion at the time of manufacturing the cover case. 7 is a front view showing the step of fixing the permanent magnet to the cover case is provided with a protrusion (a) is a cover case, (b) is a state in which the permanent magnet is inserted into the cover case of (a), ( c) shows a state in which the protrusion provided on the cover case of (a) is bent toward the inserted permanent magnet of (b). As shown here, a plurality of protrusions 781 are formed on opposite sides of the conventional cover case, respectively, and a permanent magnet 77 is inserted into the inner bottom surface of the cover case 78 in which the protrusions are formed, and the cover is provided. The protrusion 781 of the case is bent toward the inserted permanent magnet 77 so as to fix the permanent magnet. FIG. 8 is a front view of each view of FIG. 7, where (a) is a cover case, (b) is a permanent magnet inserted into the cover case of (a), and (c) Figure (a) shows the bent portion of the protrusion installed in the cover case inserted into the permanent magnet of (b). 9 (a) shows a state in which a circular permanent magnet is fixed, and (b) shows a state in which a rectangular permanent magnet is fixed. As shown here, the cover case formed with a protrusion according to the present invention has been shown to be able to work regardless of the shape of the permanent magnet, thereby improving the workability.

Hereinafter, a method of manufacturing the irreversible device according to the present invention will be described in detail.

In order to manufacture an irreversible device that protects the power amplifier module by inserting it between the power amplifier module and the antenna switch of the wireless device and transmitting the signal output from the power amplifier module to the antenna switch and absorbing the signal reflected from the antenna switch (1) Form the input / output terminal and ground terminal in the body case. The input terminal is combined with the output of the power amplifier module of the transmitter to transmit the input high frequency transmission signal Tx to the internal terminal. The output terminal is connected to the input of the antenna switch and receives the high frequency signal inputted through the input terminal through the internal terminal and finally transmits to the antenna.

Next, (2) the internal terminal is formed by forming an auxiliary terminal consisting of a round or square bottom surface and an auxiliary terminal consisting of three terminals perpendicular to the bottom surface at a vertex of an equilateral triangle centered on the center of the bottom surface. Install on the lower surface of the body case to be located at a certain height from the.

Next, garnet ferrite serving as a micro device is mounted inside the auxiliary terminal mounted in step (3) and (2). When garnet ferrite is installed inside the auxiliary terminal, which is a micro device, the garnet ferrite is surrounded by the auxiliary terminal, so the flow of garnet ferrite is prevented by this auxiliary terminal and uniform sperm is generated by the magnet. It will always be present in the continuation. In addition, three terminals vertically formed on the circular bottom surface of the auxiliary terminal form a bent portion in the middle to prevent the flow of the garnet ferrite positioned between the auxiliary terminal and the inner terminal in the horizontal direction by the auxiliary terminal. Flow in the vertical direction can be prevented.

Next, connect an input / output capacitor to the input / output terminal formed in step (4) and (1), and connect a ground capacitor and ground resistance in parallel to the ground terminal. As shown in the equivalent circuit of FIG. 2, an input / output capacitor is connected between the input / output terminal and ground, respectively, and a ground capacitor and a 50 Ω ground resistance are connected in parallel between the ground terminal and the internal terminal.

Next, (5) three conductors in the radial direction of a circular FPC (FLEXIBLE PRINTED CIRCUIT) substrate are printed so as to have a cross angle of 120 degrees to each other and placed on the auxiliary terminal installed in step (2). One end of each wire is provided with a first connection part connected to the auxiliary terminal, and the other end of the wire is provided with a second connection part which connects to a terminal formed in the body case, and the first connection part and the auxiliary terminal are brought into position. After aligning, connect by soldering. The second connection part of the second connection part installed on the conductor connected to the input / output terminal of the body case is extended to the input / output terminal of the body case and connected to the input / output capacitor and the input / output terminal. The second connector is connected to the input / output terminal of the body case and the ground terminal. The second connector, which is installed on the conductor on the signal input path, is directly connected to the input capacitor and the input terminal of the body case by soldering, and the signal is output. The second connector, which is installed on the conductor on the path, is also directly connected to the output capacitor and the output terminal of the body case, and the second connector, which is installed on the conductor on the path, which sinks the signal reflected from the output terminal, is connected in parallel with the ground capacitor. Connect with ground terminal through grounding resistance.

Next, a permanent magnet generating a static magnetic field is installed on the FPC substrate stacked in steps (6) and (5), and protrusions are formed on opposite sides of the cover case, respectively. By forming, the protrusions can be formed without further processing for processing the protrusions. Protruding portions are formed on opposite sides of the conventional cover case, and a permanent magnet is inserted into the cover case in which the protrusion is formed, and the curved portion of the cover case is bent to fix the inserted permanent magnet. The cover case formed with the protruding portion is capable of working in the form of a permanent magnet regardless of the shape of the permanent magnet, so that the workability is improved.

As such, the present invention does not need to use an adhesive by bending and fixing a protrusion formed by protruding a permanent magnet to a cover case, and does not require an additional process for processing by generating a protrusion when manufacturing a mold of the cover case. In addition, there is an effect to prevent the fall of the permanent magnet by the impact or heat at the source. In addition, work can be improved regardless of the shape of the permanent magnet workability.

Claims (4)

In the irreversible device inserted between the power amplifier module and the antenna switch of the wireless device to transmit the signal output from the power amplifier module to the antenna switch and absorbs the signal reflected from the antenna switch to protect the power amplifier module, A permanent magnet that generates a system to be applied to the garnet ferrite, and has a plurality of protrusions formed on opposite sides of each other, and a cover case coupled to an upper side of the body case in which the garnet ferrite is installed, and the bottom of the cover case. The irreversible device, characterized in that for fixing the permanent magnet by bending the protrusion to the permanent magnet side in the state that the permanent magnet is installed on the surface. The irreversible element according to claim 1, wherein the permanent magnet has a circular planar shape. The irreversible element according to claim 1, wherein the permanent magnet has a quadrangular shape in plan. Inserted between the power amplifier module and the antenna switch of the wireless device to transmit the signal output from the power amplifier module to the antenna switch and absorbs the signal reflected from the antenna switch to protect the power amplifier module in a method of manufacturing (1) the step of (1) by installing a permanent magnet generating a static magnetic field inside the cover case, and (2) by bending the protrusions formed on opposite sides of the cover case to the permanent magnet side, respectively. Method for manufacturing a non-reciprocal device characterized in that it comprises a step of fixing the permanent magnet installed in the cover case.

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