JP6118557B2 - High frequency transducer - Google Patents

Description

  The present invention relates to a high-frequency transmission line having a conversion function between a waveguide and another transmission line, and a transducer using the high-frequency transmission line.

  Conventionally, various high-frequency transmission lines that propagate high-frequency signals using a waveguide have been devised. When mode conversion is performed between such a waveguide and a transmission line of another aspect (for example, a microstrip line), a power feeding probe is inserted in the middle of the waveguide, and another power is supplied to the power feeding probe. The transmission line of the aspect is connected.

  For example, Patent Document 1 is a directional coupler using mode conversion between a microstrip line and a waveguide. The microstrip line and the waveguide are connected at one end to the microstrip line and guided at the other end. They are connected by a power supply probe (probe) inserted into the tube.

JP-A-6-132710

  However, in the above-described configuration, when the first high frequency signal and the second high frequency signal having a phase difference are input from the microstrip line side and synthesized and output from the waveguide, the following problems occur.

  In this case, the first high-frequency signal is input from the first terminal of the microstrip line, and the second high-frequency signal is input from the second terminal of the microstrip line. Then, when the first high-frequency signal and the second high-frequency signal are fed to the waveguide, the phase must be adjusted so as not to cancel each other.

  Therefore, in the conventional configuration, a phase adjustment circuit that adjusts the phase of at least one of the first high-frequency signal and the second high-frequency signal must be provided separately from the microstrip line. This increases the size of the high-frequency transmission line.

  An object of the present invention is to provide a high frequency signal capable of synthesizing and outputting a plurality of high frequency signals having different phases input from other transmission lines while performing mode conversion between the other transmission lines and the waveguide. It is to provide a transmission line.

  The high-frequency transmission line according to the present invention includes a waveguide, a first feeding probe, a second feeding probe, and a 90 ° hybrid circuit. The waveguide has an input / output port at one end in the high-frequency propagation direction and is short-circuited at the other end. The first and second feeding probes are inserted into the waveguide. The second power supply probe is arranged on the input / output port side from the first power supply probe with an odd multiple of 1/4 of the in-tube wavelength of the high-frequency signal. The 90 ° hybrid circuit includes a first terminal, a second terminal, a third terminal, and a fourth terminal. In the 90 ° hybrid circuit, a high frequency signal input from the third terminal or the fourth terminal is distributed to the first terminal and the second terminal and output with a 90 ° phase difference, and input from the first terminal or the second terminal. The high-frequency signal is distributed to the third terminal and the fourth terminal and output with a 90 ° phase difference. The first terminal is connected to the first power supply probe, and the second terminal is connected to the second power supply probe.

  In this configuration, the first high-frequency signal input from the third terminal and the second high-frequency signal input from the fourth terminal and having a phase delay of ¼ of the wavelength with respect to the first high-frequency signal are canceled out. And output from the input / output port of the waveguide.

  In the high-frequency transmission line according to the present invention, the 90 ° hybrid circuit has an electrical circuit in which the first terminal, the second terminal, the third terminal, and the fourth terminal each have an odd multiple of 1/4 of the wavelength of the high-frequency signal. It consists of a structure connected by a long track.

  In the high-frequency transmission line of the present invention, the 90 ° hybrid circuit is formed by a distributed constant planar circuit.

  In the high-frequency transmission line of the present invention, the distributed constant planar circuit is constituted by a microstrip line.

  In these configurations, specific structural examples for realizing a 90 ° hybrid circuit with a distributed constant circuit are shown. In particular, a high-frequency transmission line can be formed thin and small in the microstrip line.

  In the high-frequency transmission line of the present invention, the 90 ° hybrid circuit is formed by a circuit using a lumped constant element.

  In this configuration, a 90 ° hybrid circuit is realized by a lumped constant circuit element.

  According to another aspect of the present invention, a high frequency transducer includes a high frequency transmission line configured as described above, and a circulator having a first input / output unit connected to a third terminal. In the high-frequency transducer, the second input / output unit of the circulator is used as a first transmission signal input terminal, the fourth terminal is used as a second transmission signal input terminal, and the third input / output unit of the circulator is used as a reception signal output terminal. The circulator is configured to output a signal from the first transmission signal input terminal to the third terminal and output a signal from the third terminal to the reception signal output terminal.

  In this configuration, the first high-frequency signal (first transmission signal) and the second high-frequency signal (second transmission signal) input from the first transmission signal input terminal and the second transmission signal input terminal are combined and the waveguide. Output from the I / O port. Further, since the high-frequency signal (received signal) input from the input / output port of the waveguide is output only from the third terminal, the high-frequency signal (received signal) is sent only to the received signal output terminal via the circulator. Is output. As a result, it is possible to configure a high-frequency transducer that synthesizes and outputs a transmission signal and outputs a reception signal to a specific output terminal simply by combining a circulator with the above-described high-frequency transmission line.

  The high frequency transducer of the present invention further includes a limiter circuit between the third input / output unit of the circulator and the reception signal output terminal. In this configuration, even if a high-power signal is input from the circulator to the reception signal output terminal, the limiter circuit restricts the high-power signal from the reception signal output terminal.

  According to the present invention, while performing mode conversion between another transmission line and a waveguide, a plurality of high-frequency signals having different phases input from the other transmission line can be synthesized and output from the waveguide.

It is a circuit block diagram of the high frequency transmission line concerning the embodiment of the present invention. It is a figure for demonstrating the 1st operation | movement aspect of the high frequency transmission line which concerns on embodiment of this invention. It is a figure for demonstrating the 2nd operation | movement aspect of the high frequency transmission line which concerns on embodiment of this invention. 1 is an external perspective view of a high-frequency transmission line according to an embodiment of the present invention. 1 is a circuit block diagram of a high-frequency transducer according to an embodiment of the present invention.

  A high-frequency transmission line according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a circuit block diagram of a high-frequency transmission line according to an embodiment of the present invention.

  The high-frequency transmission line 10 includes a waveguide 20, a 90 ° hybrid line 30, a first power supply probe 41, and a second power supply probe 42.

  The waveguide 20 is a rectangular waveguide, and one end in the propagation direction of the high-frequency signal is an input / output port Port20, and the other end in the propagation direction of the high-frequency signal is short-circuited. The width and height of the opening cross section of the waveguide 20 are determined based on the frequency (wavelength λg) of the high-frequency signal propagating through the waveguide 20.

  The 90 ° hybrid line 30 includes a first terminal Ph31, a second terminal Ph32, a third terminal Ph33, and a fourth terminal Ph34, and these terminals are formed in a shape that forms square corners. The first terminal Ph31 and the second terminal Ph32 are connected with an electrical length that is approximately ¼ of the wavelength λh of the high-frequency signal (wavelength in the formed line). The second terminal Ph32 and the fourth terminal Ph34 are connected with an electrical length that is approximately ¼ of the wavelength λh of the high-frequency signal (wavelength in the formed line). The fourth terminal Ph34 and the third terminal Ph33 are connected with an electrical length that is approximately ¼ of the wavelength λh of the high-frequency signal propagating through the 90 ° hybrid line 30 (wavelength in the formed line). The third terminal Ph33 and the first terminal Ph31 are connected with an electrical length that is approximately ¼ of the wavelength λh of the high-frequency signal (wavelength in the formed line). Here, the electrical length of about ¼ of the wavelength λh means an electrical length in a range that can be considered to be equivalent to a phase of ¼ of the wavelength λh of the high-frequency signal in practical use. The electrical length between the terminals may be an odd multiple of λh / 4.

  The third terminal Ph33 is connected to the input / output port Port30, and the fourth terminal Ph34 is connected to the input / output port Port40. These connection distances are the same.

  One end of the first power supply probe 41 is connected to the first terminal Ph31 of the 90 ° hybrid line 30, and the other end of the first power supply probe 41 is inserted into the tube of the waveguide 20.

  One end of the second power supply probe 42 is connected to the second terminal Ph32 of the 90 ° hybrid line 30, and the other end of the second power supply probe 42 is inserted into the tube of the waveguide 20.

  In the waveguide 20, the first feeding probe 41 and the second feeding probe 42 are directions in which the waveguide 20 extends (directions orthogonal to the length direction and the width direction of the waveguide 20, and propagation of high-frequency signals). Are arranged at intervals of an electrical length of about ¼ of the wavelength λg of the high-frequency signal propagating through the waveguide 20 along the direction). The electrical length of the interval between the first power supply probe 41 and the second power supply probe 42 may be an odd multiple of λh / 4.

  The first power supply probe 41 is disposed at a position of a predetermined length L from the short-circuit end of the waveguide 20. The predetermined length L may be set as appropriate according to the specifications of the high-frequency transmission line.

  The second power supply probe 42 is disposed on the input / output port Port 20 side with respect to the first power supply probe 41, in other words, on the opposite side to the short-circuit termination with respect to the first power supply probe 41.

  Next, the operation principle of the high-frequency transmission line 10 according to this embodiment will be described.

(First operation mode)
FIG. 2 is a diagram for explaining a first operation mode of the high-frequency transmission line according to the embodiment of the present invention. In the first operation mode, the first high-frequency signal RF1 is input from the input / output port Port30, and the second high-frequency signal RF2 is input from the input / output port Port40. The phase of the second high-frequency signal RF2 is delayed by 90 ° from the phase of the first high-frequency signal RF1.

That is,
(Θ (RF2) = θ (RF1) −90 °) − (Formula 1)
The above phase relationship holds.

  The first high-frequency signal RF1 and the second high-frequency signal RF2 have the same frequency and the same power level.

  The first high-frequency signal RF1 is distributed at the third terminal Ph33 of the 90 ° hybrid line 30 into the first terminal Ph31 direction component and the fourth terminal Ph34 direction component. At this time, the distribution ratio is the same.

  The second high-frequency signal RF2 is distributed at the fourth terminal Ph34 of the 90 ° hybrid line 30 into the third terminal Ph33 direction component and the second terminal Ph32 direction component. At this time, the distribution ratio is the same.

  The first high-frequency signal RF1 is distributed at the third terminal Ph33 and propagated to the first terminal Ph31 and the second terminal Ph32.

Since the electrical length of the transmission line arranged between the third terminal Ph33 and the first terminal Ph31 is λh / 4, the phase θ _Ph31 (RF1) of the first high-frequency signal RF1 at the first terminal Ph31 is the third It is 90 ° ahead of the phase θ _Ph33 (RF1) of the first high-frequency signal RF1 at the terminal Ph33.

That is,
θ _Ph31 (RF1) = θ _Ph33 (RF1) + 90 ° − (Formula 2)
The above phase relationship holds.

Since the electrical length of the transmission line arranged between the third terminal Ph33 and the second terminal Ph32 is 2 × λh / 4, the phase θ _Ph32 (RF1) of the first high-frequency signal RF1 at the second terminal Ph32 is It is 180 ° ahead of the phase θ _Ph33 (RF1) of the first high-frequency signal RF1 at the third terminal Ph33.

That is,
θ _Ph32 (RF1) = θ _Ph33 (RF1) + 180 ° − (Formula 3)
The above phase relationship holds.

  The second high frequency signal RF2 is distributed at the fourth terminal Ph34 and propagated to the second terminal Ph32 and the first terminal Ph31.

Since the electrical length of the transmission line arranged between the fourth terminal Ph34 and the second terminal Ph32 is λh / 4, the phase θ _Ph32 (RF2) of the second high-frequency signal RF2 at the second terminal Ph32 is the fourth value. It is 90 ° ahead of the phase θ _Ph34 (RF2) of the second high-frequency signal RF2 at the terminal Ph34.

That is,
θ _Ph32 (RF2) = θ _Ph34 (RF2) + 90 ° − (Expression 4)
The above phase relationship holds. Therefore, from (Equation 1)
θ _Ph32 (RF2) = θ _Ph33 (RF1) − (Expression 5)
From (Equation 3) and (Equation 5),
θ _Ph32 (RF2) = θ _Ph32 (RF1) −180 ° − (Expression 6)
It becomes.

  Thus, at the second terminal Ph32, the first high-frequency signal RF1 and the second high-frequency signal RF2 are in opposite phases and cancel each other. Therefore, no high frequency signal is output to the second power supply probe 42.

Since the electrical length of the transmission line arranged between the fourth terminal Ph34 and the first terminal Ph31 is 2 × λh / 4, the phase θ _Ph31 (RF2) of the second high-frequency signal RF2 at the first terminal Ph31 is It is 180 ° ahead of the phase θ _Ph34 (RF2) of the second high-frequency signal RF2 at the fourth terminal Ph34.

That is,
θ _Ph31 (RF2) = θ _Ph34 (RF2) + 180 ° − (Expression 7)
The above phase relationship holds. Therefore, from (Equation 1)
θ _Ph31 (RF2) = θ _Ph33 (RF1) + 90 ° − (Formula 8)
From (Equation 2) and (Equation 8),
θ _Ph31 (RF2) = θ _Ph31 (RF1) − (Equation 9)
It becomes.

  In this way, at the first terminal Ph31, the first high-frequency signal RF1 and the second high-frequency signal RF2 are synthesized so as to be in phase and strengthen each other. Therefore, the synthesized high frequency signal (synthesized high frequency signal) is output to the first power supply probe 41.

  The combined high frequency signal output to the first power supply probe 41 is supplied to the waveguide 20, propagates through the waveguide 20, and is output from the input / output port Port 20.

  Thus, by using the configuration of the present embodiment, by inputting the first and second high-frequency signals RF1 and RF2 having a phase difference of 90 ° from the input / output ports Port30 and Port40 on the 90 ° hybrid line 30 side, These synthesized high frequency signals can be output from the input / output port Port 20 of the waveguide 20. Thereby, the synthesis | combination of 1st, 2nd high frequency signal RF1, RF2 and the mode conversion between the transmission line in which the 90 degree hybrid line 30 is comprised, and the waveguide 20 can be performed simultaneously. And such a high frequency line with a composition and mode conversion function can be formed small.

(Second operation mode)
FIG. 3 is a diagram for explaining a second operation mode of the high-frequency transmission line according to the embodiment of the present invention. In the second operation mode, the third high-frequency signal RF3 is input from the input / output port Port20.

  The high-frequency signal RF3 propagated through the waveguide 20 is output to the second terminal Ph32 of the 90 ° hybrid line 30 via the second feed probe 42, and the first of the 90 ° hybrid line 30 via the first feed probe 41. It is output to the terminal Ph31. At this time, the power of the high frequency signal input to the second terminal Ph32 and the high frequency input to the first terminal Ph31 are adjusted by adjusting the degree of coupling of the first and second power feeding probes 41 and 42 to the waveguide 20. Make the signal power the same.

  Since the interval between the first power supply probe 41 and the second power supply probe 42 is approximately λg / 4, the phase of the high frequency signal input to the first terminal Ph31 is greater than the phase of the high frequency signal input to the second terminal Ph32. Is also approximately 90 °.

  At the third terminal Ph33, the phase of the high-frequency signal input to the first terminal Ph31 is further advanced by 90 °. Here, the phase amount shifted by λg / 4 of the waveguide 20 is the same as the phase amount shifted by λh / 4 of the 90 ° hybrid line 30. Therefore, the phase of the high-frequency signal input to the first terminal Ph31 advances by 180 ° from the position of the second feeding probe 42 in the waveguide 20 to the third terminal Ph33 of the 90 ° hybrid line 30.

  Further, since the electrical length from the second terminal Ph32 is λh / 2 at the third terminal Ph33, the phase of the high-frequency signal input to the second terminal Ph32 advances by 180 °.

  Thereby, at the third terminal Ph33 of the 90 ° hybrid line 30, the phase of the high-frequency signal input to the first terminal Ph31 and the phase of the high-frequency signal input to the second terminal Ph32 are the same phase. Therefore, the high frequency signal input to the first terminal Ph31 and the high frequency signal input to the second terminal Ph32 are combined so as to strengthen each other, and the combined high frequency signal is input from the third terminal Ph33 to the input / output port. It flows to Port30.

  On the other hand, at the fourth terminal Ph34, the phase of the high-frequency signal input to the first terminal Ph31 further advances by 90 °. Accordingly, the phase of the high-frequency signal input to the first terminal Ph31 advances by 270 ° from the position of the second feeding probe 42 in the waveguide 20 to the fourth terminal Ph34 of the 90 ° hybrid line 30.

  Further, since the electrical length from the second terminal Ph32 is λh / 4 at the fourth terminal Ph34, the phase of the high-frequency signal input to the second terminal Ph32 advances by 90 °.

  Thereby, at the fourth terminal Ph34 of the 90 ° hybrid line 30, the phase of the high-frequency signal input to the first terminal Ph31 and the phase of the high-frequency signal input to the second terminal Ph32 are opposite. Therefore, the high-frequency signal input to the first terminal Ph31 and the high-frequency signal input to the second terminal Ph32 have a canceling relationship, and are not output from the fourth terminal Ph34.

  Thus, by using the configuration of the present embodiment, when the third high frequency signal RF32 is input from the input / output port Port20 on the waveguide 20 side, it can be output only from the third terminal Ph33 of the 90 ° hybrid line 30. it can.

  Therefore, by using the configuration of the present embodiment, a plurality of high-frequency signals input from the transmission line side input / output port group different from the waveguide 20 are synthesized and output from the input / output port on the waveguide 20 side. A high-frequency signal input from the input / output port on the waveguide 20 side can be output from a specific input / output port on the transmission line side different from the waveguide 20. And the high frequency transmission line which has such a function can be formed small.

  Such a high-frequency transmission line 10 is realized by a structure as shown in FIG. FIG. 4 is an external perspective view of the high-frequency transmission line according to the embodiment of the present invention.

  The waveguide 20 includes a tubular conductor 200 having a rectangular cross section. Two through holes (not shown) are formed on one H surface of the tubular conductor 200. The two through holes are formed at an interval of approximately ¼ of the wavelength λg along the extending direction of the tubular conductor 200. A conductor wall 201 is formed at one end in the extending direction of the tubular conductor 200. The conductor wall 201 is formed so as to block all the openings and is electrically connected to the tubular conductor 200. As a result, the position of the conductor wall 201 becomes the short-circuit end of the waveguide 20. The through hole on the conductor wall 201 side is formed at a position separated from the conductor wall 201 by a predetermined length L along the extending direction of the tubular conductor 200. The predetermined length L may be appropriately set according to the specifications of the high frequency transmission line.

  The 1st electric power feeding probe 41 and the 2nd electric power feeding probe 42 are rod-shaped conductors, and are arrange | positioned so that each may penetrate the above-mentioned through-hole. At this time, the first power supply probe 41 is disposed on the conductor wall 201 side.

  The 90 ° hybrid line 30 is in the form of a microstrip line and includes a dielectric substrate 300. The dielectric substrate 300 is disposed on the surface where the through hole of the tubular conductor 200 is formed. At this time, the dielectric substrate 300 is disposed such that the flat plate surface is in contact with the outer surface of the tubular conductor 200. A ground conductor 340 is formed on the entire surface of the dielectric substrate 300 on the side in contact with the tubular conductor 200.

  Microstrip lines 311, 312, 313 and 314 are formed on the surface of the dielectric substrate 300 opposite to the ground conductor 340. The microstrip lines 311 and 313 are long in the extending direction of the tubular conductor 200. The microstrip lines 312 and 314 have a long shape in a direction perpendicular to the extending direction of the microstrip lines 311 and 313. One end in the length direction of the microstrip line 311 is connected to the other end in the length direction of the microstrip line 314, and the other end in the length direction of the microstrip line 311 is connected in the length direction of the microstrip line 312. Connect to one end. The other end in the length direction of the microstrip line 312 is connected to one end in the length direction of the microstrip line 313. The other end in the length direction of the microstrip line 313 is connected to one end in the length direction of the microstrip line 314.

  The widths of the microstrip lines 311, 312, 313, and 314 are determined based on the characteristic impedance of the propagating high-frequency signal in consideration of the dielectric constant and thickness of the dielectric substrate 300. Further, the length of the microstrip lines 311, 312, 313, and 314 is set to approximately ¼ of the wavelength λh of the propagating high-frequency signal in consideration of the dielectric constant and thickness of the dielectric substrate 300.

  A connection point of the microstrip lines 311 and 314 corresponds to the first terminal Ph31 and is connected to the first power supply probe 41 via the microstrip line 321. A connection point of the microstrip lines 311 and 312 corresponds to the second terminal Ph32 and is connected to the second power supply probe 42 via the microstrip line 322. The lengths of the microstrip lines 321 and 322 are preferably the same. Note that the lengths of the microstrip lines 321 and 322 may not be the same by adjusting the insertion positions of the first and second power feeding probes 41 and 42.

  The connection point of the microstrip lines 312 and 313 corresponds to the fourth terminal Ph34 and is connected to the input / output port Port40 via the microstrip line 332. The connection point of the microstrip lines 313 and 314 corresponds to the third terminal Ph33 and is connected to the input / output port Port30 via the microstrip line 331. The lengths of the microstrip lines 331 and 332 are preferably the same. Further, it is preferable that the length is shorter than the microstrip lines 311, 312, 313, and 314. In this case, the high-frequency transmission line can be made as small as possible.

  With such a configuration, a thin 90 ° hybrid line 30 can be realized. Then, by attaching the thin 90 ° hybrid line 30 to the waveguide 20, the high-frequency transmission line 10 can be formed in a small size.

  Next, a high-frequency transducer using the high-frequency transmission line having the above-described configuration will be described. FIG. 5 is a circuit block diagram of the high-frequency transducer according to the embodiment of the present invention.

  The high frequency transducer 1 includes a high frequency transmission line 10, a circulator 11, a limiter 12, and a delay circuit 13 having the above-described configuration. The first input / output unit of the circulator 11 is connected to the input / output port Port 30 of the high-frequency transmission line 10. The second input / output unit of the circulator 11 is connected to the input port Port 31. The third input / output unit of the circulator 11 is connected to the output port Port 50 via the limiter 12.

  The circulator 11 outputs the high frequency signal input from the second input / output unit to the first input / output unit, and outputs the high frequency signal input to the first input / output unit to the third input / output unit. The high-frequency signal input to the unit is output to the second input / output unit.

  The limiter 12 cuts off the high-frequency signal when a high-power high-frequency signal equal to or higher than the threshold power is input. Although the limiter 12 can be omitted, the provision of the limiter 12 can prevent a high-power high-frequency signal from being output to the output port Port50. As a result, it is possible to prevent the subsequent circuit connected to the output port Port 50 from being destroyed.

  An input port Port 41 is connected to the input / output port Port 40 of the high-frequency transmission line 10 via a delay circuit 13. The delay circuit 13 is a circuit that gives a high-frequency signal the same delay amount as the propagation delay from the second input / output unit to the first input / output unit of the circulator 11.

  The high frequency transmitter / receiver 1 having such a configuration operates as follows at the time of transmission and reception.

(When sending)
At the time of transmission, the first transmission signal is input from the input port Port 31 and the second transmission signal is input from the input port Port 41. The first transmission signal and the second transmission signal have the same frequency and power. The second transmission signal is input to the input port Port 41 at a phase delayed by 90 ° from the phase of the timing at which the first transmission signal is input to the input port Port 31.

  The first transmission signal is input to the input / output port Port 30 of the high-frequency transmission line 10 via the circulator 11. The second transmission signal is input to the input / output port Port 40 of the high-frequency transmission line 10 via the delay circuit 13. The phase of the second transmission signal at the input / output port Por40 is delayed by 90 ° from the phase of the first transmission signal at the input / output port Port30.

  Since the high-frequency transmission line 10 has the above-described configuration, the first transmission signal and the second transmission signal are combined by the high-frequency transmission line 10, and the combined transmission signal is output from the input / output port Port 20 of the waveguide 20. Further, the second transmission signal is not output from the input / output port Port 30 to the circulator 11.

(When receiving)
At the time of reception, a reception signal is input from the input / output port 20. Since the high-frequency transmission line 10 has the above-described configuration, the reception signal propagates through the high-frequency transmission line 10 and is output from the input / output port Port 30. On the other hand, since the high-frequency transmission line 10 has the above-described configuration, the reception signal is not output from the input / output port Port 40.

  The reception signal output from the input / output port Port 30 is output to the output port Port 50 via the circulator 11 and the limiter 12.

  In this way, by using the configuration of the present embodiment, a high-frequency transducer that synthesizes transmission signals and outputs them from a waveguide and outputs a reception signal input from the waveguide to a specific output terminal is configured. be able to. At this time, by using the high-frequency transmission line 10 described above, the high-frequency transducer can also be reduced in size.

  Furthermore, the circulator 11 and the limiter 12 are surface-mounted components, the delay circuit 13 is formed by a microstrip line, and is provided on a dielectric substrate mounted on the waveguide 20 in the same manner as the 90 ° hybrid line 30, so The transmitter / receiver can be further reduced in size.

  When the first transmission signal Tx1 and the second transmission signal Tx2 are connected to the output terminals of the parallel synthesis type power amplifier, the delay circuit 13 is shared with the final power distribution circuit in the parallel synthesis type power amplifier. be able to. Thereby, further miniaturization becomes possible.

  In the above-described high-frequency transmitter / receiver, a configuration in which the second power supply probe 42 is omitted and the second terminal Ph32 of the 90 ° hybrid line 30 is matched and terminated can be used. In this case, the circulator 11 is connected between the first power supply probe 41 and the first terminal Ph31 of the 90 ° hybrid line 30. However, in this configuration, when the first and second transmission signals Tx1 and Tx2 are high power, the matching terminator becomes large and expensive, and the high-frequency transmitter / receiver increases in size and costs. However, by using the configuration of the above-described embodiment, the matching terminator can be omitted, and an increase in the size and cost of the high-frequency transceiver can be prevented.

  In the above-described embodiment, the high-frequency transmission line that also serves as the mode converter of the microstrip line and the waveguide has been described as an example. However, the high-frequency transmission line that is different from the waveguide other than the microstrip line is also described above. The configuration can be applied.

  Moreover, although the example which forms a 90 degree hybrid line by a distributed constant line was shown in the above-mentioned embodiment, the above-mentioned effect can be obtained also by the 90 degree hybrid circuit by a lumped constant element.

1: high frequency transducer
10: High-frequency transmission line,
11: Circulator
12: Limiter,
13: delay circuit,
20: Waveguide,
30: 90 ° hybrid line,
41: 1st electric power feeding probe,
42: second power supply probe,
200: tubular conductor,
201: conductor wall,
300: dielectric substrate,
311, 312, 313, 314, 321, 322, 331, 332: microstrip line,
340: Ground conductor

Claims (6)

A waveguide in which one end in the high-frequency propagation direction is an input / output port and the other end is short-circuited;
A first feeding probe inserted into the waveguide;
Said inserted in waveguide, said first second feed probe from feed probe are arranged spaced apart an odd multiple fraction of 1/4 of the guide wavelength of the high-frequency signal to the input port side,
A first terminal, a second terminal, a third terminal, and a fourth terminal are provided, and a high-frequency signal input from the third terminal or the fourth terminal is distributed to the first terminal and the second terminal and is about 90 °. A 90 ° hybrid circuit that is output with a phase difference and a high-frequency signal input from the first terminal or the second terminal is distributed to the third terminal and the fourth terminal and output with a 90 ° phase difference ;
A circulator to which the first input / output unit is connected to the third terminal,
The first terminal is connected to the first feeding probe, the second terminal is connected to the second feeding probe ;
The second input / output unit of the circulator is a first transmission signal input terminal, the fourth terminal is a second transmission signal input terminal, the third input / output unit of the circulator is a reception signal output terminal,
The circulator is configured to output a signal from the first transmission signal input terminal to the third terminal and to output a signal from the third terminal to the reception signal output terminal.
High frequency transducer . The high-frequency transducer according to claim 1,
The 90 ° hybrid circuit has a structure in which a first terminal, a second terminal, a third terminal, and a fourth terminal are connected by a line having an electrical length that is an odd multiple of 1/4 of the wavelength of the high-frequency signal. A high frequency transducer consisting of The high-frequency transducer according to claim 1 or 2,
The 90 ° hybrid circuit is a high frequency transducer formed by a distributed constant planar circuit. A high-frequency transducer according to claim 3,
The distributed constant planar circuit is a high frequency transmitter / receiver configured by a microstrip line. The high-frequency transducer according to claim 1,
The 90 ° hybrid circuit is a high frequency transducer formed by a circuit using a lumped constant element. The high-frequency transducer according to claim 5 ,
A limiter circuit is provided between the third input / output unit of the circulator and the reception signal output terminal.
High frequency transducer.

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