CN111781567B9 - T/R module with transceiver integrated self-diagnosis function - Google Patents
T/R module with transceiver integrated self-diagnosis function Download PDFInfo
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- CN111781567B9 CN111781567B9 CN202010375976.2A CN202010375976A CN111781567B9 CN 111781567 B9 CN111781567 B9 CN 111781567B9 CN 202010375976 A CN202010375976 A CN 202010375976A CN 111781567 B9 CN111781567 B9 CN 111781567B9
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- 238000004092 self-diagnosis Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 60
- 239000003990 capacitor Substances 0.000 claims description 57
- 238000012360 testing method Methods 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000013024 troubleshooting Methods 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
- Transmitters (AREA)
Abstract
The invention discloses a T/R module with a transceiver integrated self-diagnosis function, which is provided with a change-over switch 1, a high-power attenuator, a change-over switch 2, a change-over switch 3, a receiving detection circuit and a power detection circuit on a traditional mechanism, wherein the change-over switch 1 is arranged between a transmitting channel and a circulator, the change-over switch 1 is connected with the high-power attenuator, and the high-power attenuator is connected with the change-over switch 2 arranged between the circulator and the receiving channel; the change-over switch 3 is arranged between the receiving channel and the receiving-transmitting change-over switch and is connected with the receiving detection circuit; the power detection circuit is arranged between the circulator and the antenna. Through the structural design of the T/R module, the radar system can respectively diagnose the transmitting channel and the receiving channel in real time when working clearance or the radar system is needed, and the module fault is accurately positioned.
Description
Technical Field
The invention belongs to the field of radar equipment, and particularly relates to a T/R module with a transceiver integrated self-diagnosis function.
Background
The conventional T/R module generally has no self-checking function or only an output power detecting function of a transmitting channel, and cannot perform real-time fault diagnosis on a receiving channel and a transmitting channel of the T/R module at the same time, and a schematic diagram thereof is shown in fig. 1.
Since tens or hundreds of T/R modules are used in the radar system at the same time, if a small part of the T/R modules fail, the failure is not easily detected, but the overall performance of the radar system is affected. When a user needs to check faults, all T/R modules in the radar system need to be checked one by one, the elimination period is long, and the workload is very large.
Disclosure of Invention
The invention aims at: in order to overcome the problems in the prior art, the T/R module with the integrated receiving and transmitting self-diagnosis function is provided, and through the structural design of the T/R module, a radar system can respectively diagnose a transmitting channel and a receiving channel in real time when working gaps or are needed, so that module faults can be accurately positioned.
The aim of the invention is achieved by the following technical scheme:
the T/R module with the transceiver integrated self-diagnosis function comprises an attenuator, a phase shifter, a transceiver change-over switch, a transmitting channel, a receiving channel and a circulator, wherein the attenuator is connected with the transceiver change-over switch through the phase shifter, a transmitting end of the transceiver change-over switch is connected with the transmitting channel, the transmitting channel is connected with the circulator, the circulator is connected with the receiving channel, the receiving channel is connected with the receiving end of the transceiver change-over switch, the circulator is connected with an antenna, the attenuator is connected with a radio frequency interface, the T/R module further comprises a change-over switch 1, a high-power attenuator, a change-over switch 2, a change-over switch 3, a receiving detection circuit and a power detection circuit, the change-over switch 1 is arranged between the transmitting channel and the circulator, the change-over switch 1 is connected with the high-power attenuator, and the high-power attenuator is connected with the change-over switch 2 arranged between the circulator and the receiving channel. The change-over switch 3 is arranged between the receiving channel and the receiving-transmitting change-over switch and is connected with the receiving detection circuit; the power detection circuit is arranged between the circulator and the antenna.
According to a preferred embodiment, the reception detection circuit comprises at least: attenuator ATT, detector D1, capacitor C2, capacitor C3, capacitor C6, resistor R1, resistor R2, resistor R14, resistor R15, resistor R16, resistor R17, operational amplifier U1 and operational amplifier U5; the receiving detection circuit is connected with an attenuator ATT through an RF2_IN port, the attenuator ATT is connected with a detector D1, and the detector D1 is connected with an operational amplifier U1 through a coupling capacitor C2; the reverse end of the operational amplifier U5 is connected with the direct current voltage VCC, the output end of the operational amplifier U1 enters the same-direction end of the operational amplifier U5 through the current limiting resistor R14, and after the voltage comparison of the same-direction end and the reverse end of the operational amplifier U5 is completed, a comparison result is output, and the comparison result is output to the receiving and transmitting channel fault indication port Test through the current limiting resistor R17.
According to a preferred embodiment, a filter circuit is arranged between the detector D1 and the capacitor C2; the filter circuit comprises a resistor R1 and a capacitor C1, wherein the resistor R1 and the capacitor C1 are arranged in parallel, one end of the filter circuit is grounded, and the other end of the filter circuit is connected to a circuit between the wave detector D1 and the capacitor C2.
According to a preferred embodiment, a voltage dividing device is further arranged between the inverting terminal of the operational amplifier U5 and the direct-current voltage source VCC; the voltage divider comprises a resistor R15 and a resistor R16, one end of the resistor R15 is connected with a direct-current voltage source VCC, the other end of the resistor R15 is respectively connected with the inverting end of the operational amplifier U5 and the resistor R16, and the other end of the resistor R16 is grounded.
According to a preferred embodiment, the power detection circuit comprises at least: the coupler OH1, the capacitor C21, the capacitor C22, the capacitor C23, the capacitor C25, the resistor R21, the resistor R22, the resistor R23, the resistor R25, the resistor R26, the resistor R27, the resistor R28, the resistor R30, the resistor R31, the resistor R32, the detector D21, the operational amplifier U23, the three-input AND gate circuit U24, the two-input NOR gate circuit U25A, the two-input NOR gate circuit U25B and the two-input NOR gate circuit U25C; the receiving detection circuit is connected with a coupler OH1 through an RF IN port, the coupler OH1 is connected with a detector D21, and the detector D21 is connected with an operational amplifier U21 through a coupling capacitor C22; the reverse end of the operational amplifier U23 is connected with a direct-current voltage source VCC, the output end of the operational amplifier U21 enters the same-direction end of the operational amplifier U23 through a current-limiting resistor R25, and after the voltage comparison of the same-direction end and the opposite-direction end of the operational amplifier U23 is completed, a comparison result is output and is output to a three-input AND gate circuit U24 through a current-limiting resistor R28; meanwhile, a receiving and transmitting switching control signal of the T/R module enters the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A through a TR CTRL port and a current-limiting resistor R32, and a transmitting modulation control signal of a transmitting channel enters the three-port input AND gate circuit U24 and the two-input NOR gate circuit U25A through an AM port and a current-limiting resistor R31 to carry out logic operation. The operation results of the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A respectively enter the two-input NOR gate circuit U25B to carry out logic operation, the operation results enter the two-input NOR gate circuit U25C to carry out inversion, and finally, the power detection result outputs a fault indication of the transmitting channel to the port Tpo through the current limiting resistor R30.
According to a preferred embodiment, the isolation end of the coupler OH1 is connected to a resistor R21, and the other end of the resistor R21 is grounded.
According to a preferred embodiment, a filter circuit is arranged between the detector D21 and the capacitor C22; the filter circuit comprises a resistor R22 and a capacitor C21, wherein the resistor R22 and the capacitor C21 are arranged in parallel, one end of the filter circuit is grounded, and the other end of the filter circuit is connected to a circuit between the detector D21 and the capacitor C22.
According to a preferred embodiment, a voltage divider is further provided between the inverting terminal of the operational amplifier U23 and the dc voltage source VCC; the voltage divider comprises a resistor R26 and a resistor R27, one end of the resistor R26 is connected with a direct-current voltage source VCC, the other end of the resistor R26 is respectively connected with the inverting end of the operational amplifier U23 and the resistor R27, and the other end of the resistor R27 is grounded.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the invention can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The invention has the beneficial effects that: through the structural design of the T/R module, the radar system can respectively diagnose the transmitting channel and the receiving channel in real time when working clearance or requirement is met, and the module fault is accurately positioned. The scheme greatly increases the reliability of the radar system, can grasp the state of the T/R module in real time, shortens the time for troubleshooting and reduces the workload for troubleshooting.
Drawings
FIG. 1 is a schematic diagram of a T/R module used in the prior art;
FIG. 2 is a schematic diagram of the structure of the T/R module of the present invention;
FIG. 3 is a circuit block diagram of a receive detection circuit in the T/R module of the present invention;
fig. 4 is a circuit configuration diagram of a power detection circuit in the T/R module of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is to be considered as illustrative of the present invention by way of specific embodiments. The invention may be practiced or carried out in other embodiments that depart from the spirit and scope of the present invention, and the details of the present invention may be modified or changed from various points of view and applications. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, for the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the present invention, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present invention can be known by those skilled in the art without any creative effort.
Example 1:
referring to fig. 2, there is shown a T/R module with a transmit-receive integrated self-diagnosis function, the T/R module including an attenuator, a phase shifter, a transmit-receive switch, a transmit channel, a receive port, and a circulator, the attenuator being connected to the transmit-receive switch via the phase shifter, a transmit end of the transmit-receive switch being connected to the transmit channel, the transmit channel being connected to the circulator, the circulator being connected to a receive channel, the receive channel being connected to a receive end of the transmit-receive switch, the circulator being connected to an antenna, the attenuator being connected to a radio frequency interface,
preferably, the T/R module further comprises a transfer switch 1, a high-power attenuator, a transfer switch 2, a transfer switch 3, a reception detection circuit, and a power detection circuit.
Preferably, the change-over switch 1 is disposed between the transmitting channel and the circulator, and the change-over switch 1 is connected to a high-power attenuator, which is connected to a change-over switch 2 disposed between the circulator and the receiving channel. The change-over switch 3 is arranged between the receiving channel and the receiving/transmitting change-over switch and is connected with the receiving detection circuit.
When the T/R module carries out self-checking of a receiving channel and a transmitting channel, a test signal is only required to be input from a radio frequency interface, the signal reaches the change-over switch 1 through the attenuator 1, the phase shifter, the receiving and transmitting change-over switch and the transmitting channel, the change-over switch 1 switches the test signal to a high-power attenuator to attenuate the test signal, the power of the test signal is attenuated to a range which can be born by a receiving channel, the attenuated test signal is switched to the receiving channel through the change-over switch 2 and then is sent to a receiving and detecting circuit through the change-over switch 3, and the test signal is detected.
The receiving detection circuit detects the power of the test signal to judge whether the receiving channel and the transmitting channel are faulty or not, the transmitting channel and the receiving channel of the T/R module can be judged to work normally when the power of the test signal is in a normal range, and the transmitting channel or the receiving channel of the T/R module can be judged to be faulty when the power of the test signal is lower than the normal range.
Preferably, the power detection circuit is disposed between the circulator and the antenna.
When the T/R module completes the self-checking of the receiving and transmitting channel, if the receiving and transmitting channel faults are detected, and the receiving channel faults or the transmitting channel faults are required to be further positioned, the transfer switch 1 is only required to be switched, the test signal is sent into the power detection circuit through the circulator, and the power of the test signal can be accurately positioned. A transmit channel failure may be determined if the power of the test signal is not within the normal range, and a receive channel failure may be determined if the power of the test signal is within the normal range.
Therefore, the structural design of the T/R module can enable the radar system to diagnose the transmitting channel and the receiving channel in real time when working clearance or the radar system needs to accurately position module faults. The scheme greatly increases the reliability of the radar system, can grasp the state of the T/R module in real time, shortens the time of troubleshooting and reduces the workload of troubleshooting.
Example 2
As shown in fig. 3, on the basis of embodiment 1, the invention also discloses a receiving detection circuit. The detection circuit can detect the radio frequency signal power of the T/R module receiving channel and compare the radio frequency signal power with the reference voltage to judge whether the T/R module transmitting and receiving channel works normally or not.
Preferably, the reception detection circuit includes at least: attenuator ATT, detector D1, capacitor C2, capacitor C3, capacitor C6, resistor R1, resistor R2, resistor R14, resistor R15, resistor R16, resistor R17, operational amplifier U1, and operational amplifier U5.
Preferably, the receiving detection circuit is connected to an attenuator ATT via an RF2 IN port, the attenuator ATT is connected to a detector D1, and the detector D1 is connected to an operational amplifier U1 via a coupling capacitor C2.
Preferably, a filter circuit is arranged between the detector D1 and the capacitor C2.
Further, the filter circuit includes a resistor R1 and a capacitor C1, where the resistor R1 and the capacitor C1 are connected in parallel, one end is grounded, and the other end is connected to a line between the detector D1 and the capacitor C2.
Preferably, the reverse end of the operational amplifier U5 is connected to the dc voltage VCC, the output end of the operational amplifier U1 enters the same direction end of the operational amplifier U5 through the current limiting resistor R14, and after the voltage comparison between the same direction end and the reverse end of the operational amplifier U5 is completed, the comparison result is output, and the comparison result is output to the receiving channel fault indication port Test through the current limiting resistor R17.
Preferably, a voltage divider is further disposed between the inverting terminal of the operational amplifier U5 and the dc voltage source VCC.
Further, the voltage divider comprises a resistor R15 and a resistor R16, one end of the resistor R15 is connected with the direct-current voltage source VCC, the other end of the resistor R15 is respectively connected with the inverting end of the operational amplifier U5 and the resistor R16, and the other end of the resistor R16 is grounded.
The specific working principle is as follows:
the received RF signal attenuates the RF signal power through the attenuation ATT via the RF2 IN port to a range that can be detected by the detector D1. The radio frequency signal is converted into a voltage signal through a detector D1, filtered through a capacitor C1 and a resistor R2, and then enters an operational amplifier U1 through a coupling capacitor C2. The operational amplifier forms a follower circuit to improve driving capability and act as front and rear stage isolation.
When the T/R module performs direct fault detection of the receiving and transmitting channel, the direct-current voltage source VCC is divided by the resistors R15 and R16 and enters the reverse end of the operational amplifier U5 to serve as a reference voltage, and the reference voltage is the power detection voltage of the receiving channel after the radio-frequency signal passes through the transmitting channel and is attenuated and enters the receiving channel when the T/R module works normally. After the power detection voltage of the radio frequency signal of the receiving channel output by the U1 enters the voltage of the same-direction end and the reverse end of the operational amplifier U5 through the current limiting resistor R14 to be compared, the output end of the U3 outputs a comparison result, and the comparison result is output to the fault indication port Test of the receiving channel through the current limiting resistor R17.
When the T/R module completes the self-checking of the receiving and transmitting channel and needs to independently perform the self-checking of the receiving channel, the resistors R3, R4, R5 and R6 and the operational amplifier U2 form a subtracting circuit, the direct-current voltage VCC enters the reverse end of the subtracting circuit through the resistor R5 after being divided by the resistors R7 and R8, and the receiving detection voltage enters the same direction end of the subtracting circuit from the output end of the operational amplifier U1 through the resistor R3.
The detection voltage calculated by the subtracting circuit enters the same direction end of the operational amplifier U3 through the current limiting resistor R9. The emission detection voltage detected and held by the power detection circuit enters the receiving detection circuit through a VPo port and enters the inverting terminal of the operational amplifier U3 through a current limiting resistor R10. The output end of U3 outputs the comparison result, and the comparison result enters a two-input NOR gate circuit U4 through a current-limiting resistor R11. Meanwhile, a receiving and transmitting switching control signal of the T/R module passes through the current-limiting resistor R13 through the TR CTRL port and then enters the two-input NOR gate circuit U4. After the logic operation is performed by U4, the detection result of the receiving channel is finally output from the port Tpi through the current limiting resistor R12.
Example 3
On the basis of embodiment 1 and embodiment 2, the invention also discloses a power detection circuit, and the power detection circuit is shown with reference to fig. 4. The detection circuit can detect the radio frequency signal power of the T/R module transmitting channel and compare the radio frequency signal power with the reference voltage to judge whether the transmitting channel works normally or not. At the same time, the detection voltage can be maintained for fault detection of the reception channel. The circuit introduces a receiving and transmitting control signal and a transmitting modulation control signal of the T/R module for eliminating false alarm when the T/R module is in a receiving working state or has no pulse output.
Preferably, the power detection circuit includes at least: the coupler OH1, the capacitor C21, the capacitor C22, the capacitor C23, the capacitor C25, the resistor R21, the resistor R22, the resistor R23, the resistor R25, the resistor R26, the resistor R27, the resistor R28, the resistor R30, the resistor R31, the resistor R32, the detector D21, the operational amplifier U23, the three-input AND gate U24, the two-input NOR gate U25A, the two-input NOR gate U25B and the two-input NOR gate U25C.
Preferably, the receiving detection circuit is connected to a coupler OH1 via an RF IN port, the coupler OH1 is connected to a detector D21, and the detector D21 is connected to an operational amplifier U21 via a coupling capacitor C22.
Preferably, the isolation end of the coupler OH1 is connected to a resistor R21, and the other end of the resistor R21 is grounded.
Preferably, a filter circuit is arranged between the detector D21 and the capacitor C22.
Further, the filter circuit includes a resistor R22 and a capacitor C21, where the resistor R22 and the capacitor C21 are connected in parallel, and one end is grounded, and the other end is connected to a line between the detector D21 and the capacitor C22.
Preferably, the reverse end of the operational amplifier U23 is connected to the dc voltage source VCC, the output end of the operational amplifier U21 enters the same-directional end of the operational amplifier U23 through the current limiting resistor R25, and after the voltage comparison between the same-directional end and the opposite-directional end of the operational amplifier U23 is completed, the comparison result is output, and the comparison result is output to the three-input and gate circuit U24 through the current limiting resistor R28.
Meanwhile, a receiving and transmitting switching control signal of the T/R module enters the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A through a TR CTRL port and a current-limiting resistor R32, and a transmitting modulation control signal of a transmitting channel enters the three-port input AND gate circuit U24 and the two-input NOR gate circuit U25A through an AM port and a current-limiting resistor R31 to carry out logic operation.
The operation results of the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A respectively enter the two-input NOR gate circuit U25B to carry out logic operation, the operation results enter the two-input NOR gate circuit U25C to carry out inversion, and finally, the power detection result is output from the port Tpo to the receiving and transmitting channel fault indication port Test through the current limiting resistor R30.
Preferably, a voltage divider is further disposed between the inverting terminal of the operational amplifier U23 and the dc voltage source VCC.
Further, the voltage divider comprises a resistor R26 and a resistor R27, one end of the resistor R26 is connected with the direct-current voltage source VCC, the other end of the resistor R26 is respectively connected with the inverting end of the operational amplifier U23 and the resistor R27, and the other end of the resistor R27 is grounded.
The specific working principle is as follows:
when the T/R module performs self-checking of the transmitting channel, a radio frequency signal for detection enters the input end of the coupler OH1 through the RF IN port, and a part of the signal is output from the through end of the coupler to the RF OUT port to enter the transmitting antenna. And a part of signals enter the detector through the coupling end of the coupler, and the isolation end of the coupler is connected with a 50 ohm load resistor R21. The radio frequency signal is converted into a voltage signal through a detector, filtered through a capacitor C21 and a resistor R22, and then enters an operational amplifier U21 through a coupling capacitor C22. The operational amplifier forms a follower circuit to improve driving capability and act as front and rear stage isolation.
The detection voltage is output by the operational amplifier U21 and then enters the same-direction input end of the operational amplifier U23 of the detection circuit through the current limiting resistor R25. The dc voltage VCC is divided by resistors R26 and R27 (the voltage value is the lowest voltage value detected by the detected voltage of the rf output power normally output) and enters the inverting terminal of the operational amplifier U23. After the voltages entering the same direction end and the opposite direction end of the operational amplifier U23 are compared, the output end of the U23 outputs a comparison result, the comparison result enters the three-input AND gate circuit U24 through the current limiting resistor R28, meanwhile, a receiving and transmitting switching control signal of the T/R module enters the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A through the TR CTRL port and the current limiting resistor R32, and a transmitting modulation control signal of a transmitting channel enters the three-port input AND gate circuit U24 and the two-input NOR gate circuit U25A through the AM port and carries out logic operation. The operation results of the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A respectively enter the two-input NOR gate circuit U25B to carry out logic, the operation results enter the two-input NOR gate circuit U25C to carry out inversion, and finally, the power detection result is output from the port Tpo through the current limiting resistor R30.
When the radio frequency output power is higher than the required value, the voltage entering the same direction end of the operational amplifier U23 is higher than the reference voltage of the opposite direction end of the operational amplifier U23, and the output end of the operational amplifier U23 outputs a high level. When the radio frequency output power is lower than the required value, the voltage at the same direction end of the operational amplifier U23 is lower than the reference voltage at the opposite direction end of the operational amplifier U23, and the output end of the operational amplifier U23 outputs a low level.
Because the output of the T/R module is a pulse signal, when the module is in a receiving state or no pulse signal is output, the voltage detection voltage at the same direction end of the operational amplifier U23 is wrongly reported, so that the level of the output end of the operational amplifier U23 and the receiving and transmitting control signal TR CTRL and the transmitting modulation signal AM of the T/R module are logically operated through logic gate short circuits U24 and U25A, U B, U C to obtain a final detection result. Only when the T/R module is in a transmitting state and has pulse output, the radio frequency output power is higher than the high level output by the Tpo port at the reference time, and the radio frequency output power is lower than the low level output by the Tpo port at the reference time. When the T/R module is in a receiving state or has no pulse output, the Tpo port outputs a high level. The circuit not only completes the detection of the radio frequency output power, but also avoids the occurrence of false alarm.
Meanwhile, a sampling locking control signal enters a control port of the sampling Hold circuit U22 through the Hold port, the detection voltage is output through the operational amplifier U21 and then enters an input end of the sampling Hold circuit U22 through the current limiting resistor R24, and the voltage value is kept through the sampling Hold circuit and then is output through the VPo port for self-detection of a T/R receiving channel.
The sample-Hold circuit starts to sample when the Hold is in high level, and the sample-Hold circuit holds the sampled voltage value when the Hold is in low level. The capacitor C24 is a sampling capacitor, and is charged by the sample-hold circuit during sampling, and the voltage is held by the sample-hold circuit during holding.
The foregoing basic embodiments of the invention, as well as other embodiments of the invention, can be freely combined to form numerous embodiments, all of which are contemplated and claimed. In the scheme of the invention, each selection example can be arbitrarily combined with any other basic example and selection example.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The T/R module with the integrated receiving and transmitting self-diagnosis function is applied to the field of radar equipment, and comprises an attenuator, a phase shifter, a receiving and transmitting change-over switch, a transmitting channel, a receiving channel and a circulator, wherein the attenuator is connected with the receiving and transmitting change-over switch through the phase shifter, the transmitting end of the receiving and transmitting change-over switch is connected with the transmitting channel, the transmitting channel is connected with the circulator, the circulator is connected with the receiving channel, the receiving channel is connected with the receiving end of the receiving and transmitting change-over switch, the circulator is connected with an antenna, the attenuator is connected with a radio frequency interface,
the T/R module also comprises a change-over switch 1, a high-power attenuator, a change-over switch 2, a change-over switch 3, a receiving detection circuit and a power detection circuit,
the change-over switch 1 is arranged between the transmitting channel and the circulator, and the change-over switch 1 is connected with a high-power attenuator which is connected with the change-over switch 2 arranged between the circulator and the receiving channel;
the change-over switch 3 is arranged between the receiving channel and the receiving-transmitting change-over switch and is connected with the receiving detection circuit;
the power detection circuit is arranged between the circulator and the antenna;
the power detection circuit includes at least: the coupler OH1, the capacitor C21, the capacitor C22, the capacitor C23, the capacitor C25, the resistor R21, the resistor R22, the resistor R23, the resistor R25, the resistor R26, the resistor R27, the resistor R28, the resistor R30, the resistor R31, the resistor R32, the detector D21, the operational amplifier U23, the three-input AND gate circuit U24, the two-input NOR gate circuit U25A, the two-input NOR gate circuit U25B and the two-input NOR gate circuit U25C;
the receiving detection circuit is connected with a coupler OH1 through an RF IN port, the coupler OH1 is connected with a detector D21, and the detector D21 is connected with an operational amplifier U21 through a coupling capacitor C22;
the reverse end of the operational amplifier U23 is connected with a direct-current voltage source VCC, the output end of the operational amplifier U21 enters the same-direction end of the operational amplifier U23 through a current-limiting resistor R25,
after the operational amplifier U23 completes the voltage comparison between the same-direction end and the opposite-direction end, a comparison result is output and is output to the three-input AND gate circuit U24 through the current limiting resistor R28;
meanwhile, the receiving and transmitting switching control signal of the T/R module enters the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A through the TR CTRL port and the current-limiting resistor R32,
the transmitting modulation control signal of the transmitting channel enters the three-port input AND gate circuit U24 and the two-input NOR gate circuit U25A through the AM port and the current limiting resistor R31 to carry out logic operation;
the operation results of the three-input AND gate circuit U24 and the two-input NOR gate circuit U25A respectively enter the two-input NOR gate circuit U25B to carry out logic operation, the operation results enter the two-input NOR gate circuit U25C to carry out inversion, and finally, the power detection result outputs a fault indication of the transmitting channel to the port Tpo through the current limiting resistor R30.
2. The T/R module with integrated transceiver self-diagnosis function according to claim 1, wherein said reception detection circuit comprises at least: attenuator ATT, detector D1, capacitor C2, capacitor C3, capacitor C6, resistor R1, resistor R2, resistor R14, resistor R15, resistor R16, resistor R17, operational amplifier U1 and operational amplifier U5;
the receiving detection circuit is connected with an attenuator ATT through an RF2_IN port, the attenuator ATT is connected with a detector D1, and the detector D1 is connected with an operational amplifier U1 through a coupling capacitor C2;
the reverse end of the operational amplifier U5 is connected with the direct current voltage VCC, the output end of the operational amplifier U1 enters the same-direction end of the operational amplifier U5 through the current limiting resistor R14,
after the operational amplifier U5 finishes the voltage comparison between the same-direction end and the opposite-direction end, a comparison result is output, and the comparison result is output to the receiving and transmitting channel fault indication port Test through the current limiting resistor R17.
3. The T/R module with a transceiver-integrated self-diagnosis function according to claim 2, wherein a filter circuit is provided between the detector D1 and the capacitor C2;
the filter circuit comprises a resistor R1 and a capacitor C1, wherein the resistor R1 and the capacitor C1 are arranged in parallel, one end of the filter circuit is grounded, and the other end of the filter circuit is connected to a circuit between the detector D1 and the capacitor C2.
4. The T/R module with integrated transceiver function as claimed in claim 2, wherein a voltage divider is further provided between the inverting terminal of the operational amplifier U5 and the dc voltage source VCC;
the voltage divider comprises a resistor R15 and a resistor R16, one end of the resistor R15 is connected with a direct-current voltage source VCC, the other end of the resistor R15 is respectively connected with the inverting end of the operational amplifier U5 and the resistor R16, and the other end of the resistor R16 is grounded.
5. The T/R module with integrated transceiver function as claimed in claim 1, wherein the isolation end of the coupler OH1 is connected to a resistor R21, and the other end of the resistor R21 is grounded.
6. The T/R module with integrated transceiver function as claimed in claim 1, wherein a filter circuit is arranged between the detector D21 and the capacitor C22;
the filter circuit comprises a resistor R22 and a capacitor C21, wherein the resistor R22 and the capacitor C21 are arranged in parallel, one end of the filter circuit is grounded, and the other end of the filter circuit is connected to a circuit between the detector D21 and the capacitor C22.
7. The T/R module with integrated transceiver function as claimed in claim 1, wherein a voltage divider is further provided between the inverting terminal of the operational amplifier U23 and the dc voltage source VCC;
the voltage divider comprises a resistor R26 and a resistor R27, one end of the resistor R26 is connected with a direct-current voltage source VCC, the other end of the resistor R26 is respectively connected with the inverting end of the operational amplifier U23 and the resistor R27, and the other end of the resistor R27 is grounded.
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| CN117526992B (en) * | 2024-01-04 | 2024-03-22 | 中科海高(成都)电子技术有限公司 | Radio frequency receiving and transmitting circuit, radio frequency front-end module and electronic equipment |
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| CN111781567B (en) | 2024-01-30 |
| CN111781567A (en) | 2020-10-16 |
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Correction item: Claims Correct: Claims 1-7 submitted on March 1, 2024 False: Claims 1-7 submitted on December 18, 2023 Number: 05-01 Page: ?? Volume: 40 |