CN216354715U - Directional coupling circuit and directional coupler debugging circuit - Google Patents
Directional coupling circuit and directional coupler debugging circuit Download PDFInfo
- Publication number
- CN216354715U CN216354715U CN202122615225.6U CN202122615225U CN216354715U CN 216354715 U CN216354715 U CN 216354715U CN 202122615225 U CN202122615225 U CN 202122615225U CN 216354715 U CN216354715 U CN 216354715U
- Authority
- CN
- China
- Prior art keywords
- resistor
- directional coupler
- isolation
- circuit
- potentiometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application discloses a directional coupling circuit and a directional coupler debugging circuit, wherein the directional coupling circuit comprises a directional coupler, an isolation adjusting circuit and a potentiometer, the directional coupler is provided with an isolation end, and the output end of the potentiometer, the isolation adjusting circuit and the isolation end of the directional coupler are sequentially coupled; the isolation adjustment circuit isolates the bandwidth of the potentiometer and adjusts the bandwidth of the directional coupler. By the design, the bandwidth of the potentiometer is isolated through the isolation adjusting circuit, and the coupler is prevented from being influenced by the narrower bandwidth of the potentiometer; in addition, the isolation adjusting circuit can adjust the bandwidth of the directional coupler, so that the directional coupler can be suitable for the environment with wider bandwidth, and the application range of the directional coupler and the directional coupler circuit is widened.
Description
Technical Field
The present application relates to the field of electronic communications technologies, and in particular, to a directional coupling circuit and a directional coupler debugging circuit.
Background
With the rapid development of mobile communications, front-end transmitters for radiating microwave energy are increasingly powered. In order to monitor the working conditions of these power devices in real time, directional couplers are often used in engineering for monitoring, and because of the characteristics that the directional coupling characteristics and the coupling degree of the directional couplers can be designed arbitrarily, the directional couplers have wider application in microwave technology, and are used for monitoring microwave signals, synthesizing and distributing, and the like. Especially in microwave high-power systems, a part of energy is coupled from a main line through a directional coupler, and the power, the frequency and the frequency spectrum of a microwave signal are measured.
With the increase of frequency bands and the widening of bandwidths brought by the advance of 4G and 5G technologies, the directional coupler sometimes needs to achieve high directivity of the directional coupler in a very wide bandwidth, but due to the influence of a potentiometer in a directional coupling circuit, the directional coupler is difficult to be suitable for the frequency band with the wide bandwidth, so that the coupler with the wide bandwidth and the ultra-wide bandwidth is difficult to be made.
SUMMERY OF THE UTILITY MODEL
The purpose of the application is to provide a directional coupling circuit and a directional coupler debugging circuit, so that the directional coupler can be suitable for broadband and ultra-wideband frequency bands.
The application discloses a directional coupling circuit, which comprises a directional coupler, an isolation regulating circuit and a potentiometer, wherein the directional coupler is provided with an isolation end, and the output end of the potentiometer, the isolation regulating circuit and the isolation end of the directional coupler are sequentially coupled; the isolation adjustment circuit isolates the bandwidth of the potentiometer and adjusts the bandwidth of the directional coupler.
Optionally, the isolation adjusting circuit includes a voltage follower, a first resistor, and a diode, and the output end of the potentiometer, the voltage follower, and the first resistor are coupled in sequence; the anode of the diode is coupled to the connection point of the first resistor and the isolation terminal, and the cathode of the diode is grounded.
Optionally, the resistance of the first resistor is greater than 1K Ω.
Optionally, the isolation adjusting circuit further includes a second resistor and a third resistor, one end of the second resistor is coupled to the anode of the diode through a signal transmission line, the first resistor is electrically connected to the signal transmission line, and the other end of the second resistor is coupled to the isolation end of the directional coupler; one end of the third resistor is electrically connected with the signal transmission line, and the other end of the third resistor is grounded; the resistance value of the second resistor is smaller than that of the third resistor.
Optionally, the resistance of the second resistor is between 0 and 200 Ω, and the resistance of the third resistor is between 1 and 50M Ω.
Optionally, the first resistor, the second resistor, and the third resistor are all chip resistors.
Optionally, the potentiometer is a digital potentiometer, an output end of the digital potentiometer is coupled with the voltage follower, a memory is arranged in the digital potentiometer, and the memory stores the optimal resistance value information corresponding to the directional coupler.
Optionally, the output end of the digital potentiometer includes an adjusting resistor, a high end, a low end and a sliding end, wherein one end of the high end is connected to one end of the adjusting resistor, and the other end of the high end is connected to the power supply; one end of the low end is connected to the other end of the adjusting resistor, and the other end of the low end is suspended; one end of the sliding end is connected with the adjusting resistor in a sliding mode, and the other end of the sliding end is coupled with the voltage follower.
The application also discloses a directional coupler debugging circuit, which comprises a network analyzer, a singlechip, a computer and the directional coupling circuit, wherein the directional coupler also has an input end, an output end and a coupling end; the network analyzer is respectively communicated with the input end, the output end and the coupling end of the directional coupler and is used for measuring the directional index of the directional coupler; the computer is respectively communicated with the network analyzer and the single chip microcomputer, and controls the single chip microcomputer to output corresponding electric signals according to the measurement result of the network analyzer; the input end of the digital potentiometer is coupled with the output port of the singlechip, and the output end of the digital potentiometer is coupled with the isolation end of the directional coupler through an isolation adjusting circuit; the input end of the digital potentiometer receives the electric signal of the singlechip, adjusts and outputs a corresponding resistance value signal to the isolation adjusting circuit according to the electric signal, and adjusts the on-resistance of a diode in the isolation adjusting circuit.
Optionally, the input end of the digital potentiometer includes a CS pin, a U/D pin, and an INC pin, and the output port of the single chip microcomputer includes a plurality of I/O pins; the CS pin, the U/D pin and the INC pin are respectively coupled with the I/O pins in a one-to-one correspondence mode through connectors; when the CS pin receives a low level signal, the INC pin receives a falling edge signal and the U/D pin receives a high level signal, a control module in the digital potentiometer adjusts the number of conducted resistors in the digital potentiometer to increase the resistance value output by the digital potentiometer; when the CS pin receives a low level signal, the INC pin receives a falling edge signal, and the U/D pin receives a low level signal, a control module in the digital potentiometer adjusts the number of conducted resistors in the digital potentiometer, so that the resistance value output by the digital potentiometer is reduced.
Compared with the scheme that the potentiometer is directly coupled with the isolation end of the directional coupler at present, the directional coupler is additionally provided with the isolation adjusting circuit, the bandwidth of the potentiometer is isolated through the isolation adjusting circuit, and the coupler is prevented from being influenced by the narrower bandwidth of the potentiometer; in addition, the isolation adjusting circuit can adjust the bandwidth of the directional coupler, so that the directional coupler can be suitable for the environment with wider bandwidth, and the application range of the directional coupler and the directional coupler circuit is widened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic diagram of a directional coupling circuit according to a first embodiment of the present application;
FIG. 2 is a diagram of a digital potentiometer according to a first embodiment of the present application;
FIG. 3 is a schematic diagram of a directional coupling circuit according to a second embodiment of the present application;
FIG. 4 is a schematic diagram of a first directional coupler debug circuit provided in a third embodiment of the present application;
fig. 5 is a schematic diagram of a second directional coupler debugging circuit according to a third embodiment of the present application.
10, a directional coupler debugging circuit; 100. a directional coupling circuit; 200. a directional coupler; 210. an input end; 220. an output end; 230. a coupling end; 240. an isolation end; 300. a potentiometer; 310. a memory; 320. a register; 330. a control module; 340. adjusting the resistance; 350. a digital potentiometer; 400. an isolation regulation circuit; 410. a voltage follower; 420. a diode; 430. a signal transmission line; 500. a network analyzer; 600. a single chip microcomputer; 700. a computer; RW, sliding end; RL, low end; RH, high end; r1, a first resistor; r2, a second resistor; r3 and a third resistor.
Detailed Description
The present application will now be described in detail with reference to the drawings and alternative embodiments, it being understood that any combination of the various embodiments or technical features described below may form new embodiments without conflict.
The first embodiment is as follows:
as shown in fig. 1, which is a schematic diagram of a directional coupling circuit provided in a first embodiment of the present application, in a directional coupling circuit 100, a directional coupler 200, an isolation adjusting circuit 400, and a potentiometer 300 are included, the directional coupler 200 has an isolation end 240, and an output end of the potentiometer 300, the isolation adjusting circuit 400, and the isolation end 240 of the directional coupler 200 are coupled in sequence; the isolation adjustment circuit 400 isolates the bandwidth of the potentiometer 300 and adjusts the bandwidth of the directional coupler 200.
Due to the characteristics of most potentiometers 300, the bandwidth is narrow, and the bandwidth of the coupler is narrowed directly after the isolation end 240. Based on this, the isolation regulating circuit 400 is additionally arranged in the directional coupling circuit 100, and the bandwidth of the potentiometer 300 is isolated through the isolation regulating circuit 400, so that the coupler is prevented from being influenced by the narrower bandwidth of the potentiometer 300; in addition, the isolation adjustment circuit 400 can also adjust the bandwidth of the directional coupler 200, so that the directional coupler 200 can be suitable for an environment with a wider bandwidth, and the application range of the directional coupler 200 and the directional coupling circuit 100 is increased.
Specifically, the isolation adjustment circuit 400 includes a voltage follower 410, a first resistor R1, and a diode 420, and the output terminal of the potentiometer 300, the voltage follower 410, and the first resistor R1 are coupled in sequence; the anode of the diode 420 is coupled to the connection point of the first resistor R1 and the isolation terminal 240, that is, the first resistor R1 and the isolation terminal 240 are both connected to the anode of the diode 420, and the cathode of the diode 420 is grounded.
In the isolation adjusting circuit 400, the load capacity of the potentiometer 300 is increased by the voltage follower 410, so that the voltage or current magnitude output by the potentiometer 300 is not affected. Furthermore, a first resistor R1 is connected in series between the voltage follower 410 and the diode 420, and R1 is used for attenuating the radio frequency signal from the directional coupler 200 to the potentiometer 300, so as to avoid influencing the coupler when the potentiometer 300 is adjusted. The resistance of R1 is large, specifically above 1K Ω, so that the rf signal of directional coupler 200 goes through diode 420 to ground, not through potentiometer 300 and voltage follower 410, and thus does not affect the bandwidth of directional coupler 200.
Therefore, the potentiometer 300 only affects the voltage across the diode 420; the on-resistance of the diode 420 affects the isolation of the directional coupler 200, so that the on-voltage of the diode 420 is affected by changing the resistance of the potentiometer 300, the on-resistance of the diode 420 is affected after the on-voltage is changed, and finally the on-resistance of the diode 420 affects the isolation of the directional coupler 200. Therefore, by the above design, the resistance of the potentiometer 300 affects the isolation of the directional coupler 200, and the bandwidth of the directional coupler 200 is not affected by the bandwidth of the potentiometer 300.
Of course, in this embodiment, the voltage follower 410 may also be replaced by an emitter follower, an amplifier, a triode, or other devices, the first resistor R1 may also be replaced by an inductor, a magnetic bead, or other devices, and the replaced devices may also achieve the same effect. The voltage follower 410 and the diode 420 can be of common types, additional customization is not needed, and cost is reduced; the first resistor R1 can be a chip resistor formed by mixing metal powder and glass glaze powder and printing the mixture on a circuit board by a screen printing method. Because the chip resistor has the characteristics of moisture resistance, high temperature resistance and small temperature coefficient, the space cost of the circuit can be greatly saved, and the design is more refined.
In this embodiment, the potentiometer 300 is preferably a digital potentiometer 350, and compared with a mechanical potentiometer and other types of potentiometers, the digital potentiometer 350 has better stability and reliability, and can avoid failure mechanisms caused by vibration and contact oxidation of the mechanical potentiometer, so that the directional coupling circuit 100 and the whole machine have the same service life, the failure risk of a communication system is greatly reduced, the later maintenance cost is saved, and better economic benefits are brought.
However, because of the existence of stray capacitance in the digital potentiometer 350, the frequency response is limited by the time constant of the capacitance resistance, so that the frequency response range of the digital potentiometer 350 is relatively narrow, the bandwidth of the digital potentiometer 350 itself is relatively narrow, and the directional coupler 200 is difficult to realize broadband and ultra-wideband. After the digital potentiometer 350 is combined to the present embodiment, the output terminal of the digital potentiometer 350 is coupled to the voltage follower 410, so that the whole directional coupling circuit 100 has high stability, and the directional coupler 200 can be made into a coupler with a width and an ultra-wideband.
As shown in fig. 2, a memory 310 is disposed in the digital potentiometer 350, and the memory 310 stores the optimal resistance information corresponding to the directional coupler 200. By storing the debugged optimal resistance information of the corresponding directional coupler in the memory 310 of the digital potentiometer 350, the directional coupler 200 can be debugged to the best performance according to the optimal resistance output by the digital potentiometer 350.
Moreover, the digital potentiometer 350 further comprises a register 320, the register 320 is communicated with the memory 310 of the digital potentiometer 350, and records the information of the resistance conducted in the digital potentiometer 350 during the debugging process of the directional coupler 200; when the network analyzer 500 detects that the directivity index of the directional coupler 200 meets a preset condition, the memory 310 locks and stores the resistance information of the digital potentiometer 350, which is recorded by the register 320 at this time.
At the output end of the digital potentiometer 350, an adjusting resistor 340, a high end RH, a low end RL and a sliding end RW are included, as an example, one end of the high end RH is connected to one end of the adjusting resistor 340, and the other end is connected to a power supply; one end of the low end RL is connected to the other end of the adjusting resistor 340, and the other end of the low end RL is suspended; one end of the sliding terminal RW is slidably connected to the adjusting resistor 340, and the other end thereof is coupled to the voltage follower 410. Of course, one end of the sliding end RW is slidably connected to the adjusting resistor 340, and the other end is connected to the power supply; one end of the high-end RH is connected to one end of the adjusting resistor 340, and the other end is suspended; one end of the low end RL is connected to the other end of the regulating resistor 340, and the other end of the low end RL is coupled to the voltage follower 410. Or one end of the sliding end RW is slidably connected to the adjusting resistor 340, and the other end is coupled to the voltage follower 410; one end of the low end RL is connected to one end of the adjusting resistor 340, and the other end is connected to a power supply; one end of the high-end RH is connected to the other end of the regulating resistor 340, and the other end of the high-end RH is suspended. Of course, one end of the sliding end RW is slidably connected to the adjusting resistor 340, and the other end is connected to the power supply; one end of the low end RL is connected to one end of the adjusting resistor 340, and the other end is suspended; one end of the high terminal RH is connected to the other end of the regulating resistor 340, and the other end of the high terminal RH is coupled to the voltage follower 410.
Example two:
as shown in fig. 3, the schematic diagram of a directional coupling circuit provided in the second embodiment is different from the first embodiment in that a second resistor R2 and a third resistor R3 are further added to the first embodiment, specifically, the isolation adjustment circuit 400 further includes a second resistor R2 and a third resistor R3, one end of the second resistor R2 is coupled to the anode of the diode 420 through a signal transmission line 430, the first resistor R1 is electrically connected to the signal transmission line 430, and the other end of the second resistor R2 is coupled to the isolation end 240 of the directional coupler 200; one end of the third resistor R3 is electrically connected to the signal transmission line 430, and the other end is grounded; the resistance value of the second resistor R2 is smaller than that of the third resistor R3.
In the embodiment, the second resistor R2 is connected in series in front of the diode 420, and the third resistor R3 is connected to the ground, so that the influence of the junction capacitance of the diode 420 and the parasitic inductance of the circuit can be effectively reduced, the directional coupler 200 can be adjusted better, and the performance is better.
The specific principle is as follows: the total parasitic capacitance C of the isolation terminal 240 is (Cd + Cr2) × Cr3/(Cd + Cr2) + Cr3, where Cr3 represents the parasitic capacitance of the second resistor R2 connected in series, Cr2 represents the parasitic capacitance of the third resistor R3 connected in parallel, and Cd represents the junction capacitance and the parasitic capacitance of the diode 420; since the parasitic capacitance Cr3 of the second resistor R2 is smaller than the junction capacitance of the diode 420 and the parasitic capacitance Cd, the total capacitance C is smaller than the junction capacitance and the parasitic capacitance of the diode 420, which can weaken the influence of the parasitic capacitance on the isolation circuit.
Similarly, the total parasitic inductance L of the isolation terminal 240 is (Ld + Lr3) × Lr2/(Ld + Lr3) + Lr2, where Lr3 represents the parasitic inductance of the second resistor R2 connected in series, Lr2 represents the parasitic inductance of the third resistor R3 connected in parallel, and Ld represents the parasitic inductance of the diode 420; since Lr2 is small, the total inductance L of the isolation terminal 240 is very small, thereby attenuating the effect of parasitic inductance on the isolation circuit.
Further, the resistance value of the second resistor R2 is set to be between 0 Ω and 200 Ω, and the resistance value of the third resistor R3 is set to be between 1 Ω and 50M Ω, so that the resistance value of the third resistor R3 is far greater than that of the second resistor R2, the total capacitance C is far less than the junction capacitance and the parasitic capacitance of the diode 420, and the total inductance L is far less than the parasitic inductance of the diode 420, thereby eliminating the influence of the parasitic capacitance and the parasitic inductance on the isolation circuit.
In this embodiment, the second resistor R2 and the third resistor R3 may also be chip resistors, so as to achieve the effects of saving the space cost of the directional coupling circuit 100 and making the design of the directional coupling circuit 100 more fine.
Example three:
as shown in fig. 4, the present application further discloses a directional coupler debugging circuit 10 to adjust the resistance of the digital potentiometer 350 in the first embodiment; as shown in fig. 5, the present application also discloses another directional coupler debugging circuit 10 to adjust the resistance of the digital potentiometer 350 in the second embodiment. Specifically, the directional coupler debugging circuit 10 includes a network analyzer 500, a single chip microcomputer 600, a computer 700, and the directional coupling circuit 100 as described above, and the directional coupler 200 further has an input end 210, an output end 220, and a coupling end 230; the network analyzer 500 is communicated with the input end 210, the output end 220 and the coupling end 230 of the directional coupler 200, and measures the directivity index of the directional coupler 200; the computer 700 is respectively communicated with the network analyzer 500 and the single chip microcomputer 600, and controls the single chip microcomputer 600 to output corresponding electric signals according to the measurement result of the network analyzer 500; the input end of the digital potentiometer 350 is coupled with the output port of the single chip microcomputer 600, and the output end of the digital potentiometer 350 is coupled with the isolation end 240 of the directional coupler 200 through the isolation adjusting circuit 400; the input end of the digital potentiometer 350 receives the electrical signal of the single chip microcomputer 600, adjusts and outputs a corresponding resistance value signal to the isolation adjusting circuit 400 according to the electrical signal, and adjusts the on-resistance of the diode 420 in the isolation adjusting circuit 400.
The input end of the digital potentiometer 350 comprises a CS pin, a U/D pin and an INC pin, and the output port of the single chip microcomputer 600 comprises a plurality of I/O pins; and the CS pin, the U/D pin and the INC pin are respectively coupled with the I/O pins in a one-to-one correspondence mode through connectors.
When the CS pin receives a low level signal, the INC pin receives a falling edge signal, and the U/D pin receives a high level signal, the sliding end RW of the digital potentiometer 350 slides upward, and the control module 330 of the digital potentiometer 350 adjusts the number of the resistors turned on in the digital potentiometer 350, so as to increase the resistance value output by the digital potentiometer 350;
when the CS pin receives a low level signal, the INC pin receives a falling edge signal, and the U/D pin receives a low level signal, the sliding end RW of the digital potentiometer 350 slides downward, and the control module 330 of the digital potentiometer 350 adjusts the number of the resistors turned on in the digital potentiometer 350, so that the resistance value output by the digital potentiometer 350 is reduced;
when the CS pin receives a rising edge signal, the INC pin receives a high level signal, and the U/D pin receives an arbitrary signal, the position of the sliding end RW in the digital potentiometer 350 is not moved, and the memory stores the position information of the sliding end RW in the digital potentiometer 350 at this time;
when the CS pin receives a high level signal, the INC pin receives an arbitrary signal, and the U/D pin receives an arbitrary signal, the sliding terminal RW in the digital potentiometer 350 waits for a current;
when the CS pin receives a rising edge signal, the INC pin receives a low level signal, and the U/D pin receives an arbitrary signal, the memory in the digital potentiometer 350 does not store the position information of the wiper RW, and returns to wait.
During debugging, the bus interface of the digital potentiometer 350 is programmed through the singlechip 600 or a logic circuit, so that the CS pin of the digital potentiometer 350 is a low level end during debugging, the INC pin is a pulse signal end, and the U/D pin is an adjusting end of the resistance value or voltage of the potentiometer 300. In the state that the CS pin and the INC pin normally work, when the U/D pin receives a high level, the resistance value or the voltage of the digital potentiometer 350 gradually increases; when the U/D pin receives a low level, the opposite is true. The directional coupler 200 is optimized by adjusting the level signal received at the U/D pin. At this time, the CS pin and the INC pin receive a high level signal at the same time, latch the current register data into the memory, and extract the position information of the wiper terminal RW corresponding to the optimal resistance value of the digital potentiometer 350, so as to achieve the purpose of keeping the resistance value of the digital potentiometer 350 unchanged after power is turned on again, thereby completing the debugging process. After debugging, when the directional coupler 200 is used, the data stored in the memory is directly called, and the optimal resistance value output of the digital potentiometer 350 is given to the directional coupler 200 without connecting a singlechip 600 or a logic circuit.
The foregoing is a detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A directional coupling circuit is characterized by comprising a directional coupler, an isolation regulating circuit and a potentiometer, wherein the directional coupler is provided with an isolation end, and the output end of the potentiometer, the isolation regulating circuit and the isolation end of the directional coupler are sequentially coupled;
the isolation adjustment circuit isolates the bandwidth of the potentiometer and adjusts the bandwidth of the directional coupler.
2. The directional coupling circuit of claim 1, wherein the isolation adjustment circuit comprises a voltage follower, a first resistor and a diode, the output of the potentiometer, the voltage follower and the first resistor being coupled in sequence; the anode of the diode is coupled to the connection point of the first resistor and the isolation terminal, and the cathode of the diode is grounded.
3. The directional coupling circuit of claim 2, wherein the first resistor has a resistance greater than 1K Ω.
4. The directional coupling circuit of claim 2, wherein the isolation adjustment circuit further comprises a second resistor and a third resistor, one end of the second resistor is coupled to the anode of the diode through a signal transmission line, the first resistor is electrically connected to the signal transmission line, and the other end of the second resistor is coupled to the isolated end of the directional coupler; one end of the third resistor is electrically connected with the signal transmission line, and the other end of the third resistor is grounded;
the resistance value of the second resistor is smaller than that of the third resistor.
5. The directional coupling circuit of claim 4, wherein the second resistor has a resistance value between 0 Ω and 200 Ω and the third resistor has a resistance value between 1 Ω and 50 Ω.
6. The directional coupling circuit of claim 4, wherein the first, second, and third resistors are all chip resistors.
7. The directional coupling circuit according to claim 2, wherein the potentiometer is a digital potentiometer, an output terminal of the digital potentiometer is coupled to the voltage follower, and a memory is provided in the digital potentiometer, and the memory stores information on an optimal resistance value corresponding to the directional coupler.
8. The directional coupling circuit of claim 7, wherein the output terminal of the digital potentiometer includes a regulating resistor, a high terminal, a low terminal and a sliding terminal, wherein one terminal of the high terminal is connected to one terminal of the regulating resistor, and the other terminal is connected to a power supply; one end of the low end is connected to the other end of the adjusting resistor, and the other end of the low end is suspended; one end of the sliding end is connected with the adjusting resistor in a sliding mode, and the other end of the sliding end is coupled with the voltage follower.
9. A directional coupler debugging circuit, comprising a network analyzer, a single-chip microcomputer, a computer and a directional coupling circuit according to any one of claims 7 to 8, the directional coupler further having an input terminal, an output terminal and a coupling terminal;
the network analyzer is respectively communicated with the input end, the output end and the coupling end of the directional coupler and is used for measuring the directional index of the directional coupler; the computer is respectively communicated with the network analyzer and the single chip microcomputer, and controls the single chip microcomputer to output corresponding electric signals according to the measurement result of the network analyzer;
the input end of the digital potentiometer is coupled with the output port of the singlechip, and the output end of the digital potentiometer is coupled with the isolation end of the directional coupler through an isolation adjusting circuit; the input end of the digital potentiometer receives the electric signal of the singlechip, adjusts and outputs a corresponding resistance value signal to the isolation adjusting circuit according to the electric signal, and adjusts the on-resistance of a diode in the isolation adjusting circuit.
10. The directional coupler debugging circuit of claim 9, wherein the input of the digital potentiometer comprises a CS pin, a U/D pin, and an INC pin, and the output port of the single-chip microcomputer comprises a plurality of I/O pins; the CS pin, the U/D pin and the INC pin are respectively coupled with the I/O pins in a one-to-one correspondence mode through connectors;
when the CS pin receives a low level signal, the INC pin receives a falling edge signal and the U/D pin receives a high level signal, a control module in the digital potentiometer adjusts the number of conducted resistors in the digital potentiometer to increase the resistance value output by the digital potentiometer;
when the CS pin receives a low level signal, the INC pin receives a falling edge signal, and the U/D pin receives a low level signal, a control module in the digital potentiometer adjusts the number of conducted resistors in the digital potentiometer, so that the resistance value output by the digital potentiometer is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122615225.6U CN216354715U (en) | 2021-10-27 | 2021-10-27 | Directional coupling circuit and directional coupler debugging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122615225.6U CN216354715U (en) | 2021-10-27 | 2021-10-27 | Directional coupling circuit and directional coupler debugging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216354715U true CN216354715U (en) | 2022-04-19 |
Family
ID=81130674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122615225.6U Active CN216354715U (en) | 2021-10-27 | 2021-10-27 | Directional coupling circuit and directional coupler debugging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216354715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114628876A (en) * | 2022-05-16 | 2022-06-14 | 深圳市鼎阳科技股份有限公司 | Microstrip line directional coupler, radio frequency transceiver and vector network analyzer |
-
2021
- 2021-10-27 CN CN202122615225.6U patent/CN216354715U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114628876A (en) * | 2022-05-16 | 2022-06-14 | 深圳市鼎阳科技股份有限公司 | Microstrip line directional coupler, radio frequency transceiver and vector network analyzer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1453335B1 (en) | Apparatus and method for monitoring antenna state of mobile station | |
| ES2868273T3 (en) | Power amplifier power circuit and terminal | |
| CN104852749A (en) | Radio frequency circuit and terminal equipment | |
| CN108270494A (en) | Detection device, method and communication equipment | |
| CN216354715U (en) | Directional coupling circuit and directional coupler debugging circuit | |
| US9660607B2 (en) | Solid state impedance tuners | |
| CN109560360A (en) | A kind of directional coupler | |
| CN109660219A (en) | Calibration circuit, method, apparatus, equipment and the storage medium of power amplifier | |
| CN110418369A (en) | A kind of test device | |
| CN103051393A (en) | Method and device for radio frequency test of wireless communication terminal of private network | |
| CN103795482A (en) | Method for debugging antenna transmission performance | |
| CN110658391A (en) | Auxiliary testing device and testing method for electromagnetic compatibility | |
| CN218387926U (en) | EMC darkroom test system for V2X equipment | |
| CN210894607U (en) | Microwave amplifier test system | |
| CN108683427B (en) | Antenna adjusting circuit and antenna adjusting method | |
| CN113630146B (en) | Line switching system and method for radio frequency conduction test | |
| CN115421026A (en) | Aging test method, circuit and system for batch PD chips | |
| CN102185574A (en) | Electrically tunable gain equalizer circuit | |
| CN113346931B (en) | Method for receiving data by multiple antennas, mobile terminal and storage medium | |
| CN211453937U (en) | Radar in-situ detection system | |
| CN109510671B (en) | Setting method and system, and testing method and system of wireless communication module | |
| CN108282172A (en) | A kind of power supply adaptor | |
| CN105738738A (en) | Radio frequency test device and system | |
| CN210328001U (en) | Testing device | |
| CN109472082B (en) | Voltage evaluation method and device of antenna switch and computer equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |