JP2005341048A - Amplifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an amplifier for conducting the adjustment of a passing phase by a space-saving configuration. <P>SOLUTION: The amplifier is provided with: microstrip lines 6 to 8 arranged and divided distributively into a plurality of parts; an input connector 5 whose fitting position is freely set in directions of the microstrip lines 6 to 8; and copper foil for connecting divided parts of the microstrip lines from the fitting position of the input connector 5 to a position of a transistor 4 (e.g. between the microstrip lines 6 and 7, or between the microstrip lines 7 and 8). Thus, the passing phase can be adjusted by making the length of the microstrip lines freely adjustable and the amplifier can be obtained by a space-saving configuration without the need for U-shaped microstrip lines or the like. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a phase adjustable amplifier.

In a two-synthesis amplifier that uses two unit amplifiers in combination, it is necessary to adjust the passing phase between the two unit amplifiers. The adjustment of the passing phase is generally performed by physically changing the line length of the microstrip line.
Conventionally, as a method of changing the line length of the microstrip line, for example, a gap is provided in the middle of the microstrip line, and a U-shaped type that is arranged on another substrate between the gaps and can adjust the line length. There is one that connects microstrip lines (for example, see Patent Document 1).

JP-A-5-14004

  Since the conventional amplifier is configured as described above, it is necessary to provide another substrate having a large substrate area on which the U-shaped microstrip line is arranged, and can be applied to a two-synthesis amplifier having a limited substrate area. There were issues such as being unable to do so.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an amplifier that realizes adjustment of a passing phase with a space-saving configuration.

  In the amplifier according to the present invention, at least one of the input-side microstrip line and the output-side microstrip line is divided into a plurality of lines in the line direction, and the microstrip of the input connector and the output connector is arranged. The connector on which the line is divided is attached in the direction of the line, and the divided portion of the microstrip line from the connector attachment position to the transistor is connected.

  According to the present invention, the mounting position of the connector can be freely set in the line direction of the microstrip line arranged in a plurality of parts, and the line length of the microstrip line can be reduced by connecting the divided parts of the microstrip line. By making it adjustable, the passing phase can be adjusted, and there is an effect that it can be realized with a space-saving configuration without using a U-shaped microstrip line or the like.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a unit amplifier in which a phase adjustment circuit according to Embodiment 1 of the present invention is arranged on a substrate. In the figure, substrates 2 and 3 and a transistor 4 are mounted on a base 1. The input connector 5 is freely attached in the line direction of a plurality of microstrip lines (input-side microstrip lines) 6 to 8 and is connected to any one of these microstrip lines 6 to 8. is there. Note that a phase adjustment circuit 9 capable of adjusting the line length is configured by connecting the divided portions of the microstrip line from the attachment position of the input connector 5 to the transistor 4.
The DC cut capacitor 10 is connected to the microstrip line 8, and the impedance matching circuit 11 is constituted by a microstrip line (input side microstrip line), and is connected to the DC cut capacitor 10 and the gate of the transistor 4. . The bias voltage terminal 12 is integrally formed with the microstrip line of the impedance matching circuit 11, and the bypass capacitor 13 is provided between the bias voltage terminal 12 and the gate of the transistor 4.
The impedance matching circuit 14 is configured by a microstrip line (output-side microstrip line), connected to the drain or source of the transistor 4, and the power supply voltage terminal 15 is formed integrally with the microstrip line of the impedance matching circuit 14. The capacitor 16 is provided between the power supply voltage terminal 15 and the drain or source of the transistor 4. The DC cut capacitor 17 is connected to the impedance matching circuit 14, the microstrip line (output side microstrip line) 18 is connected to the DC cut capacitor 17, and the output connector 19 is connected to the microstrip line 18. is there.

Next, the operation will be described.
In FIG. 1, the high frequency power input from the input connector 5 passes through the phase adjustment circuit 9, the DC cut capacitor 10, and the impedance matching circuit 11 including the microstrip lines 6 to 8 divided into a plurality, and is input to the transistor 4. The The bias voltage of the transistor 4 is applied from the bias voltage terminal 12. The high frequency power amplified by the transistor 4 passes through the impedance matching circuit 14, the DC cut capacitor 17 and the microstrip line 18 and is output from the output connector 19. The power supply voltage of the transistor 4 is supplied from the power supply voltage terminal 15. The bypass capacitors 13 and 16 flow high frequency from the transistor 4 side to the ground, and reduce the influence of high frequency on the DC power supply.
Here, since there is a limit to the power that can be obtained by one unit amplifier, there is a method of obtaining high-output high-frequency power by configuring two combined amplifiers by connecting two unit amplifiers in parallel. In this case, synthesis cannot be performed normally unless the passing phases of the unit amplifiers connected in parallel are matched.
In the unit amplifier shown in FIG. 1, the passing phase from the input connector 5 to the output connector 19 varies depending on individual differences and mounting positions of the DC cut capacitors 10, 17 and the transistor 4. Therefore, a phase adjustment circuit 9 is provided that allows the input connector 5 to be freely attached, changes the line length of the microstrip line, and adjusts the passing phase.

Hereinafter, the phase adjustment circuit 9 of the unit amplifier will be described in detail.
FIG. 2 is a block diagram showing details of the phase adjustment circuit of the unit amplifier according to the first embodiment of the present invention. In FIG. 2 (A), since the input connector 5 is freely attached in the line direction (vertical direction in the figure) of the microstrip lines 6 to 8, the core wire of the input connector 5 is connected to the microstrip line 8. It is what. Therefore, according to the configuration shown in FIG. 2A, the high-frequency power input from the input connector 5 passes through the microstrip line 8, the DC cut capacitor 10, and the impedance matching circuit 11 and is input to the transistor 4. . Here, the line length from the core wire of the input connector 5 to the DC cut capacitor 10 is assumed to be t1. Note that FIG. 2C is a side view of FIG.
In FIG. 2 (B), the attachment position of the input connector 5 is changed, and the core wire of the input connector 5 is connected to the microstrip line 7. The microstrip line 7 and the microstrip line 8 are connected by a copper foil or the like. Therefore, according to the configuration shown in FIG. 2B, the high-frequency power input from the input connector 5 passes through the microstrip line 7, the copper foil, the microstrip line 8, the DC cut capacitor 10, and the impedance matching circuit 11. It passes through and is input to the transistor 4. Here, the line length from the core wire of the input connector 5 to the DC cut capacitor 10 is assumed to be t2.
Thus, the line length can be changed from t1 to t2 by changing the mounting position of the input connector 5 from the state of FIG. 2A to the state of FIG. 2B. As a result, the passing phase from the input connector 5 to the DC cut capacitor 10 can be changed, so that the passing phase of the unit amplifier can be adjusted.
Further, in order to increase the line length, the core wire of the input connector 5 is connected to the microstrip line 6, and the microstrip line 6 and the microstrip line 7, and the microstrip line 7 and the microstrip line 8 are connected by a copper foil or the like. In addition, it is possible to further delay the passing phase.
3 is a circuit diagram showing a unit amplifier according to Embodiment 1 of the present invention. FIG. 3A is a circuit diagram in which the connection of FIG. 2A is applied to the unit amplifier shown in FIG. 1 as a phase adjustment circuit. FIG. 3B is a circuit diagram in which the connection of FIG. 2B is applied to the unit amplifier shown in FIG. 1 as a phase adjustment circuit. The reference numerals are the same as those shown in FIG.

FIG. 4 is an assembly diagram showing the input connector mounting structure of the unit amplifier according to the first embodiment of the present invention. In the figure, one set of screw holes 21 and 22 is provided for each position where the input connector 5 can be mounted. In the case of the first embodiment, three sets of six screw holes are provided for the microstrip lines 6 to 8 in total. The fixing member 23 holds the input connector 5. The set of screws 24 and 25 passes through the fixing member 23 and the set of screw holes 21 and 22 to fix the input connector 5 at a desired position. Is.
Thus, by providing a plurality of sets of screw holes 21 and 22 in advance, the input connector 5 can be easily attached to a desired position.

FIG. 5 is a circuit diagram showing a two-synthesis amplifier according to Embodiment 1 of the present invention. In the figure, a two-distributor 26 divides input high-frequency power into two, and unit amplifiers 27 and 28 include Each unit amplifier is provided with a phase adjustment circuit 9 as shown in FIG. The two synthesizer 29 synthesizes two high-frequency powers output from the unit amplifiers 27 and 28.
6 is a block diagram showing a two-synthesis amplifier according to Embodiment 1 of the present invention. FIG. 6 (A) is a plan view thereof, and FIG. 6 (B) is a side view thereof. In the figure, the fin 30 radiates heat generated by the unit amplifiers 27 and 28. The reference numerals are the same as those shown in FIGS.
5 and 6, the input high frequency power is divided into two by the two distributors 26, amplified by the unit amplifiers 27 and 28, and the two high frequency powers synthesized by the two combiner 29 are output. At this time, the fin 30 radiates heat generated by the unit amplifiers 27 and 28.
Thus, in order to obtain a high-output high-frequency power, as shown in FIGS. 5 and 6, two unit amplifiers are connected in parallel to form a two-synthesis amplifier. Since vector synthesis is performed, a loss occurs when the input phases of the two synthesizers 29 are different. Therefore, by using the unit amplifier shown in FIG. 1 as the unit amplifiers 27 and 28, the two passing phases of the unit amplifiers 27 and 28 can be easily matched, and the two-synthesis amplifier can be operated efficiently. it can.

As described above, according to the first embodiment, the input connector 5 can be freely attached in the line direction of the microstrip lines 6 to 8 that are divided into a plurality of parts, and the microstrip lines 6 to 8 are divided. By connecting the locations, it is possible to adjust the passage phase by making the line length of the microstrip line adjustable, and without using a U-shaped microstrip line, etc. Can be realized.
In the unit amplifier shown in FIG. 1 of the first embodiment, the input connector 5 can be freely attached and the phase length of the input-side microstrip line can be changed to adjust the passing phase. 9 is provided, but this is not limited to the input side, and may be provided on the output side. The mounting position of the output connector 19 is made flexible, the line length of the output side microstrip line is changed, and the passing phase is adjusted. Even if a possible phase adjustment circuit is provided, the same effect can be obtained.
Further, in this case, the input connector mounting structure of the unit amplifier shown in FIG. 4 may also be applied as an output connector mounting structure, and the same effect is obtained.

Embodiment 2. FIG.
FIG. 7 is a block diagram showing details of the phase adjustment circuit of the unit amplifier according to the second embodiment of the present invention. FIG. 7A is a plan view thereof, and FIG. 7B is a side view thereof. In the figure, a substrate (first substrate) 32 is mounted on a base 31, and a microstrip line (second microstrip line) disposed on the substrate (second substrate) 2 is disposed on the substrate 32. ) A microstrip line (first microstrip line) 33 having the same impedance as that of FIG. 8 and having an arbitrary line length and connected to the input connector 5 is disposed. Other configurations are the same as those in FIG.

Next, the operation will be described.
The second embodiment shows a configuration in which a microstrip line 33 prepared on another substrate 32 is added to a unit amplifier as a configuration that allows the line length to be adjusted.
In FIG. 7, the input connector 5 and the microstrip line 8 are arranged on the base 31, the substrate 32, and an additional board on which the microstrip line 33 having the same impedance as the microstrip line 8 is arranged. The newly added microstrip line 33 and the microstrip line 8 are connected to each other by the copper foil or the like. At this time, the line length t3 from the input connector 5 to the DC cut capacitor 10 can be made longer than the line length t1 before the newly added microstrip line 33 is added. Up to 10 passing phases can be changed.
The newly added substrate 32 of the microstrip line 33 does not have to be the same as the material of the substrate 2 used for the unit amplifier. By preparing a newly added microstrip line having the same length with a substrate material having a different dielectric constant, it is possible to finely adjust the phase.

As described above, according to the second embodiment, by providing the substrate 32 having an arbitrary line length and the microstrip line 33 connected to the input connector 5, the line length of the microstrip line can be reduced. By making it adjustable, the passing phase can be adjusted, and a space-saving configuration can be realized without using a U-shaped microstrip line or the like.
In the unit amplifier shown in FIG. 7 of the second embodiment, a microstrip line 33 having an arbitrary line length is disposed between the input connector 5 and the substrate 2 on which the microstrip line 8 is disposed. The additional board 32 is added, the line length of the input-side microstrip line is changed, and the phase adjustment circuit capable of adjusting the passing phase is provided. However, this is not limited to the input side, and may be provided on the output side. An additional board on which a microstrip line formed at an arbitrary line length is added between the connector 19 and the board 3 on which the microstrip line 18 is arranged, and the line length of the output-side microstrip line is changed and passed. Even if a phase adjustment circuit capable of adjusting the phase is provided, the same effect can be obtained.

Embodiment 3 FIG.
FIG. 8 is a block diagram showing details of the phase adjustment circuit of the unit amplifier according to the third embodiment of the present invention. In the figure, one set of screw holes 21 and 22 is provided at a position where the input connector 5 can be attached. It is only provided. The fixing member 34 holds the input connector 5 and has an elongated hole 35 whose longitudinal direction is the direction of changing the attachment position (vertical direction in the figure). The set of screws 24 and 25 are slidably fixed to the input connector 5 through the elongated holes 35 of the fixing member 34 and the set of screw holes 21 and 22.
The metal piece 36 has one end connected to the input connector 5 and the other end connected to be slidable in the line direction of the microstrip line 8. Other configurations are the same as those in FIG.

Next, the operation will be described.
In the third embodiment, the input connector 5 and the metal piece 36 that are slidable in the direction of changing the mounting position are provided as a configuration that allows the line length to be adjusted.
In FIG. 8, a metal piece 36 is disposed on the surface of the substrate 2, one end of the metal piece 36 is connected to the core wire of the input connector 5, and the other end is connected to the microstrip line 8 on the substrate 2. The metal piece 36 has the same width as the microstrip line 8, and the impedance when the metal piece 36 is disposed on the surface of the substrate 2 is made to be the same as that of the microstrip line 8. By doing so, it is possible to keep the input impedance of the input connector 5 constant.
FIG. 8A is a plan view showing the input connector 5 and the substrate 2 separated, and FIG. 8D is a side view thereof. FIG. 8B is a plan view in which the line length from the input connector 5 to the DC cut capacitor 10 is the shortest t4, and FIG. 8E is a side view thereof. The input connector 5 held by the fixing member 34 is slidably fixed by passing the set of screws 24 and 25 through the elongated hole 35 and the set of screw holes 21 and 22 of the fixing member 34. The FIG. 8C is a plan view in which the line length from the input connector 5 to the DC cut capacitor 10 is the longest t5 by sliding the input connector 5 and the metal piece 36, and FIG. 8F is a side view thereof. is there.
Thus, by sliding the input connector 5 and the metal piece 36, the line length t4 from the input connector 5 to the DC cut capacitor 10 can be increased to t5, and the passage from the input connector 5 to the DC cut capacitor 10 can be made. The phase can be changed.

As described above, according to the third embodiment, by providing the metal piece 36 slidably connected in the line direction of the microstrip line 8, the line length of the microstrip line 8 can be adjusted. Can adjust the passing phase and can be realized with a space-saving configuration without using a U-shaped microstrip line or the like.
In order to extend the microstrip line 8, the divided microstrip lines 6 and 7 and the microstrip line 33 on the separate substrate 32 are not used, so that the phase is changed continuously unlike the first and second embodiments. It becomes possible to make it. Further, a printed board may be used instead of the metal piece 36, and the same effect can be obtained.
Moreover, the input connector 5 can be fixed only by providing one set of screw holes 21 and 22, and the manufacturing process can be facilitated. Moreover, since the input connector 5 can be slid continuously after the input connector 5 is once attached and the attachment position can be adjusted, fine adjustment of the passing phase can be facilitated.
In the unit amplifier shown in FIG. 8 of the third embodiment, the input connector 5 and the metal piece 36 that are slidable in the direction of changing the mounting position are provided. The same effect can be obtained by providing an output connector 19 and a metal piece that can be slid in the direction of changing the mounting position, changing the line length of the output microstrip line, and providing a phase adjustment circuit that can adjust the passing phase. Play.
Further, in this case, the input connector mounting structure of the unit amplifier shown in FIG. 8A may also be applied as an output connector mounting structure, and the same effect is achieved.
Furthermore, the present invention may be applied to the first embodiment and has the same effect.
FIG. 9 is a block diagram showing details of the phase adjustment circuit of the unit amplifier according to the third embodiment of the present invention. The structure for attaching the input connector of the unit amplifier shown in FIG. 8A is applied to the first embodiment. It is what. The reference numerals are the same as those shown in FIGS.

Embodiment 4 FIG.
FIG. 10 is a block diagram showing details of the phase adjustment circuit of the unit amplifier according to the fourth embodiment of the present invention. FIG. 10A is a plan view and FIG. 10B is a side view thereof. In the figure, a substrate 32 is mounted on a base 31, and the substrate 32 is formed of the same impedance as that of the microstrip line 8 disposed on the substrate 2 and is formed to have an arbitrary line length. The microstrip line 33 connected to is arranged.
Moreover, the input connector 5 is freely attached in the line direction of the microstrip lines 6 to 8 divided into a plurality of parts, and is connected to any one of the microstrip lines 6 to 8. Other configurations are the same as those in FIG.

Next, the operation will be described.
In the fourth embodiment, the mounting position of the input connector 5 according to the first embodiment is made flexible and the line length of the microstrip line is changed, and the unit amplifier according to the second embodiment is replaced with another substrate 32. This is a combination of a method of adding the prepared microstrip line 33.
In FIG. 10, the connection position of the substrate 32 on which the microstrip line 33 that can be set to an arbitrary line length is arranged freely in the line direction of the microstrip lines 6 to 8, and the microstrip line 33 is connected to the microstrip line 33. By connecting the divided portions up to the line 8 with a copper foil or the like, the line length can be changed to t6, for example, and the passing phase from the input connector 5 to the DC cut capacitor 10 can be changed.

As described above, according to the fourth embodiment, a substrate 32 having a microstrip line 33 having an arbitrary line length and having a microstrip line 33 connected to the input connector 5 is provided and divided into a plurality of microstrips. By making the connection position of the microstrip line 33 freely in the line direction of the strip lines 6 to 8 and connecting the divided portions of the microstrip lines 6 to 8, the degree of freedom in adjusting the line length of the microstrip line is further increased. The passage phase can be adjusted more easily.
In the unit amplifier shown in the fourth embodiment, the phase adjustment circuit is provided on the input side. However, this is not limited to the input side, and may be provided on the output side, and the same effect is obtained. .
Further, the structure shown in FIG. 8 in addition to FIG. 4 may be applied to the structure for attaching the input connector of the unit amplifier, and the same effect can be obtained.

It is a block diagram which shows the unit amplifier which has arrange | positioned the phase adjustment circuit by Embodiment 1 of this invention on the board | substrate. It is a block diagram which shows the detail of the phase adjustment circuit of the unit amplifier by Embodiment 1 of this invention. 1 is a circuit diagram showing a unit amplifier according to a first embodiment of the present invention. It is an assembly drawing which shows the attachment structure of the input connector of the unit amplifier by Embodiment 1 of this invention. It is a circuit diagram which shows the 2 synthetic | combination amplifier by Embodiment 1 of this invention. It is a block diagram which shows the 2 synthetic | combination amplifier by Embodiment 1 of this invention. It is a block diagram which shows the detail of the phase adjustment circuit of the unit amplifier by Embodiment 2 of this invention. It is a block diagram which shows the detail of the phase adjustment circuit of the unit amplifier by Embodiment 3 of this invention. It is a block diagram which shows the detail of the phase adjustment circuit of the unit amplifier by Embodiment 3 of this invention. It is a block diagram which shows the detail of the phase adjustment circuit of the unit amplifier by Embodiment 4 of this invention.

Explanation of symbols

  1, 31 base, 2, 3 substrate (second substrate), 4 transistors, 5 input connectors, 6-8 microstrip line (input side microstrip line, second microstrip line), 9 phase adjustment circuit, 10 , 17 DC cut capacitor, 11, 14 Impedance matching circuit, 12 Bias voltage terminal, 13, 16 Bypass capacitor, 15 Power supply voltage terminal, 18 Microstrip line (output side microstrip line), 19 Output connector, 21, 22 Screw hole , 23, 34 fixing member, 24, 25 screw, 262 distributor, 27, 28 unit amplifier, 292 synthesizer, 30 fin, 32 substrate (first substrate), 33 microstrip line (first microstrip) Track), 35 elongated holes, 36 metal pieces.

Claims (6)

An input-side microstrip line that is connected to the input connector and transmits the input high-frequency power;
A transistor connected to the input microstrip line for amplifying the transmitted high-frequency power;
An output-side microstrip line that is connected to the transistor and transmits amplified high-frequency power;
An output connector connected to the output-side microstrip line and outputting the transmitted high-frequency power;
At least one of the input side microstrip line and the output side microstrip line is divided into a plurality of lines in the line direction, and the microstrip line of the input connector and the output connector is divided. An amplifier characterized in that the position of the connector disposed in the direction of the line is freely attached, and the divided portion of the microstrip line from the position of the connector to the transistor is connected. An input-side microstrip line that is connected to the input connector and transmits the input high-frequency power;
A transistor connected to the input microstrip line for amplifying the transmitted high-frequency power;
An output-side microstrip line that is connected to the transistor and transmits amplified high-frequency power;
An output connector connected to the output-side microstrip line and outputting the transmitted high-frequency power;
At least one of the input side microstrip line and the output side microstrip line is:
A first microstrip line disposed on the first substrate with an arbitrary line length and connected to the input connector or the output connector;
An amplifier comprising: a second microstrip line disposed on a second substrate and connected to the first microstrip line and the transistor. An input-side microstrip line that is connected to the input connector and transmits the input high-frequency power;
A transistor connected to the input microstrip line for amplifying the transmitted high-frequency power;
An output-side microstrip line that is connected to the transistor and transmits amplified high-frequency power;
An output connector connected to the output-side microstrip line and outputting the transmitted high-frequency power;
At least one of the input side microstrip line and the output side microstrip line is:
An amplifier comprising a metal piece having one end connected to the input connector or the output connector and the other end slidably connected in the line direction of the microstrip line. At least one of the input side microstrip line and the output side microstrip line is:
A first microstrip line disposed on the first substrate with an arbitrary line length and connected to the input connector or the output connector;
A second microstrip line disposed on the second substrate and divided into a plurality of lines in the line direction and connected to the first microstrip line and the transistor;
The first microstrip line is freely connected in the line direction of the second microstrip line, and the second microstrip line from the connection position of the first microstrip line to the transistor is divided. 4. The amplifier according to claim 3, wherein the points are connected. Of the input connector or output connector, the connector that allows the mounting position to be freely arranged in the line direction of the microstrip line,
5. An amplifier according to claim 1, wherein a set of screw holes is provided for each mountable position and is fixed by a set of screws. . Of the input connector or output connector, the connector that allows the mounting position to be freely arranged in the line direction of the microstrip line,
It is held by a fixing member having an elongated hole whose longitudinal direction is the changing direction of the mounting position,
4. A set of screw holes is provided at an attachable position, and the set of screws are slidably fixed through the elongated holes and screw holes of the fixing member. 5. The amplifier according to any one of items 4.

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