JPH0534702U - Microwave phase adjustment circuit - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Two open stubs are used for 1/4 of the frequency.
The size of the circuit is miniaturized when the phase adjusting circuits provided at a distance of the wavelength are connected in multiple stages. [Composition] Two open stubs are used for 1/4 of the frequency
One open stub 16 of the phase adjusting circuit of the next stage is provided between the two open stubs 6 and 11 of the phase adjusting circuit which are provided with a distance of the wavelength.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a microwave signal phase adjustment circuit used when finely adjusting the phase of a microwave signal.

[0002]

[Prior Art]

 FIG. 2 is a diagram showing a conventional phase adjusting circuit, in which 1 is a main line, 2, 7, 12, and 17 are capacitors whose one ends are connected to the main line 1, and 4, 9, 14, and 19 are capacitors 2 and 7, respectively. , 12, 17 are diodes whose cathodes are connected to the other ends of the inductors 3, 8, 13, 18 and the inductors 5, 10, 15, 20 whose one end is connected to the cathode of the diode and whose other ends are connected to the power source are One end of the inductor is connected to the anode of the diode and the other end is grounded, and the inductors 6, 11, 16 and 21 are open stubs connected to the anode of the diode for determining the phase amount. At this time, the capacitors 2 and 7 and 12 and 17 are at a distance of ¼ wavelength in the frequency band used.

Next, the operation will be described. When a voltage is applied to the inductors 3 and 8 so that a forward voltage is applied to the diodes 4 and 9 and a voltage is applied to the inductors 13 and 18 so that a reverse voltage is applied to the diodes 14 and 19, the main line 1 and the open circuit are opened. The stubs 6 and 11 are connected, and the phase of the microwave signal passing through the main line 1 can be changed by a certain amount of phase. When a voltage is applied to the inductors 3 and 8 so that a reverse voltage is applied to the diodes 4 and 9 and a voltage is applied to the inductors 13 and 18 so that a forward voltage is applied to the diodes 14 and 19, the main line 1 is opened. By connecting the stubs 16 and 21, it is possible to obtain a change in the phase amount different from the above-mentioned phase amount. Therefore, the transmission phase of the microwave signal passing through the main line 1 can be finely adjusted by gradually providing the phase amount obtained by the open stub.

[0004]

[Problems to be solved by the device]

 Since the conventional phase adjustment circuit is configured as described above, when preparing a plurality of phase adjustment circuits, the main line has a length that is equal to the quarter wavelength of the operating frequency multiplied by the number of adjustment circuits. is necessary. Therefore, there is a problem that the circuit becomes large when the number of adjusting circuits is increased.

The present invention has been made to solve the above problems, and an object thereof is to miniaturize a circuit without changing the adjustment method.

[0006]

[Means for Solving the Problems]

 The phase adjusting circuit according to the present invention has another set of open stubs that can obtain different changes in the amount of phase between a set of open stubs that are set at a distance of ¼ wavelength that changes the transmission phase. By providing one open stub, the size is reduced.

[0007]

[Action]

 The phase adjustment circuit according to the present invention comprises a pair of open stubs, one open stub and the other open stub, which are provided with a distance of ¼ wavelength at the operating frequency provided to change the transmission phase by a certain phase amount. The whole adjustment circuit can be made compact by providing one open stub of another set of open stubs that is provided to change the transmission phase by a phase amount different from that of the above-mentioned one set of open stubs. Turn into.

[0008]

【Example】

 An embodiment according to this invention is shown in FIG. In FIG. 1, 1 is a main line through which a microwave signal is passed, 2 is a first capacitor whose one end is connected to the main line, and 4 is a first capacitor whose other end of the first capacitor 2 is connected to a cathode. The diode 3 is a first inductor whose one end is connected to the cathode of the first diode 4 and the other end is connected to a power supply and which has a sufficiently high impedance with respect to the frequency used, and 6 is the diode of the first diode 4. The first open stub 5 connected to the node is a second inductor having one end connected to the anode of the first diode 4 and the other end grounded. A second capacitor, one end of which is connected to the main line 1 and is separated from the first capacitor 2 by a quarter wavelength at the operating frequency, and 9 is a cathode connected to the other end of the second capacitor 7. A second diode 8 which has one end connected to the cathode of the second diode 9 and the other end which is connected to a power source and which has a sufficiently high impedance at the operating frequency. A fourth inductor having a sufficiently high impedance connected to the anode of the second diode 9 and having the other end grounded, and having a sufficiently high impedance, 11 is a second open stub having one end connected to the anode of the second diode 9 , 12 is a third capacitor whose one end is connected to the main line 1 and which is provided between the first capacitor 2 and the second capacitor 7, and 14 is a cathode connected to the other end of the third capacitor. The third diode, 13 has a sufficiently high impedance at the operating frequency where one end is connected to the cathode of the third diode 14 and the other end is connected to the power supply. The fifth inductor 15 has a sixth inductor 15 having one end connected to the anode of the third diode 14 and the other end grounded, and having a sufficiently high impedance at the operating frequency. 16 is the third diode 14 An open stub connected to the anode, 17 is a fourth capacitor whose one end is connected to the main line 1 and which is provided at a position separated from the third capacitor 12 by a quarter wavelength in the operating frequency band, and 19 is a fourth capacitor. Capacitor 17 has a fourth diode whose cathode is connected to the other end, and 18 has a sufficiently high impedance in the operating frequency band in which one end is connected to the cathode of the fourth diode 19 and the other end is connected to the power supply. The fourth inductor 20 is sufficiently high in the operating frequency band in which one end is connected to the anode of the fourth diode 19 and the other end is grounded. Eighth inductor having impedance, 21 is a fourth open stub connected Ano over de of the fourth diode 19.

Next, the operation of the embodiment will be described. A voltage is applied to the first and third inductors 3 and 8 so that a forward voltage is applied to the first diode 4 and the second diode 9, and a reverse voltage is applied to the third and fourth diodes 14 and 19. When a voltage is applied to the fifth and seventh inductors 13 and 18 so that the microwave signal passes through the main line 1, the main line 1 is connected to the first open stub 6 and the second open stub 11. The transmission phase of can be changed by a certain phase amount. In addition, a voltage is applied to the first and third inductors 3 and 8 so that a reverse voltage is applied to the first and second diodes 4 and 9, and a forward voltage is applied to the third and fourth diodes 14 and 19. When a voltage is applied to the fifth and seventh inductors 13 and 18 so that a voltage is applied, the main line 1, the third open stub 16 and the fourth open stub 21 are connected, and a microwave signal passing through the main line 1 The transmission phase of can be changed by a phase amount different from the phase amount. Therefore, the transmission phase of the microwave signal passing through the main line 1 can be finely adjusted by gradually providing the phase amount that can be changed by the open stub.

[0010]

[Effect of the device]

 Since the present invention is configured as described above, there is an effect that the circuit can be downsized when the phase adjustment circuits are connected in multiple stages.

[Brief description of drawings]

FIG. 1 is a diagram showing a phase adjustment circuit according to an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional phase adjustment circuit.

[Explanation of symbols]

 1 Main line through which microwave signal is passed 2 First capacitor 3 First inductor 4 First diode 5 Second inductor 6 First open stub 7 Second capacitor 8 Third inductor 9 Second diode 10th Fourth Inductor 11 Second Open Stub 12 Third Capacitor 13 Fifth Inductor 14 Third Diode 15 Sixth Inductor 16 Third Open Stub 17 Fourth Capacitor 18 Seventh Inductor 19 Fourth Diode 20 8th inductor 21 4th open stub

Claims (1)

[Scope of utility model registration request] 1. A main line that transmits a microwave signal, a first capacitor whose one end is connected to the main line, a first diode whose cathode is connected to the other end of the first capacitor, An open stub connected to the anode of the diode, a first inductor having one end connected to the cathode of the first diode and the other end connected to the power supply, and having a sufficiently high impedance for the operating frequency; Second inductor connected to the anode of the diode and having the other end grounded and having a sufficiently high impedance for the used frequency, and one end connected to the main line and the first capacitor and the 1/4 wavelength at the used frequency A second capacitor provided at a remote position, a second diode whose cathode is connected to the other end of the second capacitor, and an anode of the second diode. Second open stub connected to the diode, one end connected to the cathode of the second diode and the other end connected to the power supply, a third inductor for the operating frequency, and one end connected to the anode of the second diode. A fourth inductor connected to the other end and having a sufficiently high impedance with respect to the frequency used, and one end connected to the main line and provided between the first diode and the second diode. The third capacitor, the third diode whose cathode is connected to the other end of the third capacitor, the third open stub connected to the anode of the third diode, and one end to the cathode of the third diode A fifth inductor having a sufficiently high impedance with respect to the operating frequency, which is connected and the other end is connected to a power source,
A sixth inductor, one end of which is connected to the anode of the third diode and the other end of which is grounded, and which has a sufficiently high impedance for the operating frequency, and one end of which is connected to the main line and which is used from the third capacitor 1 / in frequency
A fourth capacitor provided at a position separated by four wavelengths, a fourth diode whose cathode is connected to the other end of the fourth capacitor, an open stub connected to the anode of the fourth diode, and one end of which is A seventh inductor connected to the cathode of the fourth diode and the other end of which is connected to the power supply and has a sufficiently high impedance for the operating frequency, and one end connected to the anode of the fourth diode and the other end grounded. A micro that consists of an eighth inductor with a sufficiently high impedance for the operating frequency and is connected by turning on the main line and the first and second diodes or the third and fourth diodes to pass through the main line. A microwave phase adjustment circuit that adjusts the transmission phase of a wave signal.