Radar interference test system

Abstract

The invention discloses a radar interference test system, which comprises a control module, a frequency generation module, a radio frequency emission module and a switch selection module, and is characterized in that the control module is used for generating a waveform configuration signal, a conduction signal and an emission signal; the frequency generation module is used for receiving the waveform configuration signal and generating a radio frequency signal of a target waveform; the radio-frequency transmitting module is used for receiving a radio-frequency signal of a target waveform, amplifying the radio-frequency signal of the target waveform, receiving a transmitting signal and transmitting the amplified radio-frequency signal, the radio-frequency transmitting module at least comprises two radio-frequency transmitting units, and different radio-frequency transmitting units correspondingly amplify radio-frequency signals of different waveforms; the switch selection module is used for receiving the conduction signal and the radio frequency signal of the target waveform, conducting the radio frequency emission unit corresponding to the radio frequency signal of the target waveform, transmitting the radio frequency signal of the target waveform to the radio frequency emission module, and disconnecting the radio frequency emission unit not corresponding to the radio frequency signal of the target waveform.

Description

Technical Field

[0001] The present invention relates to the field of radar technology, and in particular to a radar interference testing system. Background Art

[0002] With the popularization of autonomous driving assistance systems such as adaptive cruise control, lane keeping, and automatic braking, the safety of vehicle-mounted millimeter-wave radar is particularly important as an important part of the system. Radar has good anti-interference ability and can improve the safety of the entire system, so it must undergo anti-interference testing during design. At present, the mainstream operating frequency bands of vehicle-mounted millimeter-wave radar and traffic millimeter-wave radar are 76-81GHz, 24-24.25GHz, etc. In order to evaluate the anti-interference ability of the radar, it is necessary to conduct interference testing on the radar within the working frequency band. However, the current millimeter-wave radar interference test system only supports single-band operation. Different test systems are required to test the anti-interference ability of radars in different frequency bands. Summary of the invention

[0003] The present invention provides a radar interference test system, aiming to effectively solve the technical problem that the millimeter wave radar interference test system in the prior art only supports single frequency band operation and different test systems are required to be used to test the anti-interference capabilities of radars in different frequency bands.

[0004] The present invention provides a radar interference test system, comprising: a control module, a frequency generating module, a radio frequency transmitting module and a switch selecting module, wherein the control module is used to generate a waveform configuration signal, a conduction signal and a transmission signal; the frequency generating module is used to receive the waveform configuration signal and generate a radio frequency signal of a target waveform; the radio frequency transmitting module is used to receive the radio frequency signal of the target waveform, amplify the radio frequency signal of the target waveform, receive the transmission signal, and transmit the amplified radio frequency signal, and the radio frequency transmitting module comprises at least two radio frequency transmitting units, and different radio frequency transmitting units correspond to amplifying radio frequency signals of different waveforms; the switch selecting module is used to receive the conduction signal and the radio frequency signal of the target waveform, and is used to conduct the radio frequency transmitting unit corresponding to the radio frequency signal of the target waveform, transmit the radio frequency signal of the target waveform to the radio frequency transmitting module, and disconnect the radio frequency transmitting unit that does not correspond to the radio frequency signal of the target waveform.

[0005] Furthermore, the RF transmitting module is also used to generate a power parameter signal, the control module is also used to receive the power parameter signal to monitor the transmission power of the RF transmitting module, and the control module is also used to adjust the transmission power of the RF transmitting module according to the power parameter signal.

[0006] Further, the frequency generating module includes: a crystal oscillator, a waveform generator, a loop low-pass filter, a voltage-controlled oscillator, a frequency multiplier and a digitally controlled attenuator, and the waveform configuration signal includes a waveform generating signal, wherein the crystal oscillator is electrically connected to a first signal input terminal of the waveform generator, a second signal input terminal of the waveform generator is electrically connected to the control module for receiving the waveform generating signal, a signal output terminal of the waveform generator is electrically connected to a signal input terminal of the loop low-pass filter, a signal output terminal of the loop low-pass filter is electrically connected to a signal input terminal of the voltage-controlled oscillator, a signal output terminal of the voltage-controlled oscillator is electrically connected to a third signal input terminal of the waveform generator, and a signal output terminal of the voltage-controlled oscillator is electrically connected to a signal input terminal of the frequency multiplier, a signal output terminal of the frequency multiplier is electrically connected to a first signal input terminal of the digitally controlled attenuator, and a signal output terminal of the digitally controlled attenuator is electrically connected to the switch selection module.

[0007] Furthermore, the waveform configuration signal also includes a power adjustment signal; the second signal input terminal of the digitally controlled attenuator is electrically connected to the control module for receiving the power adjustment signal and adjusting the power of the frequency generating module.

[0008] Further, the RF transmitting module includes two RF transmitting units, namely a first RF transmitting unit and a second RF transmitting unit, and the switch module includes: a first single-pole double-throw switch, a first single-pole single-throw switch, and a second single-pole single-throw switch, wherein the first input end of the first single-pole double-throw switch is electrically connected to the frequency generating module for receiving the RF signal of the target waveform, and the second output end of the first single-pole double-throw switch is electrically connected to the control module for receiving the conduction signal;

[0009] The input end of the first single-pole single-throw switch is electrically connected to the first output end of the first single-pole double-throw switch, and the output end of the first single-pole single-throw switch is electrically connected to the first RF transmitting unit; the input end of the second single-pole single-throw switch is electrically connected to the second output end of the first single-pole double-throw switch, and the output end of the second single-pole single-throw switch is electrically connected to the second RF transmitting unit.

[0010] Furthermore, the first RF transmitting unit includes: a first power amplifier, a first coupler, a first power divider and a 24 GHz RF antenna, wherein the first input end of the first power amplifier is electrically connected to the output end of the first single-pole single-throw switch, the output end of the first power amplifier is electrically connected to the input end of the first coupler, the first output end of the first coupler is electrically connected to the input end of the first power divider, and the output end of the first power divider is electrically connected to the 24 GHz RF antenna; the first power amplifier also has a second input end, which is electrically connected to the control module for receiving the transmission signal; the second RF transmitting unit includes: a triple frequency multiplier A device, a second power amplifier, a second coupler, a second power divider and a 76-81 GHz radio frequency antenna, wherein the input end of the triple frequency multiplier is electrically connected to the output end of the second single-pole single-throw switch, the output end of the triple frequency multiplier is electrically connected to the first input end of the second power amplifier, the output end of the second power amplifier is electrically connected to the input end of the second coupler, the first output end of the second coupler is electrically connected to the input end of the second power divider, and the output end of the second power divider is electrically connected to the 76-81 GHz radio frequency antenna; the second power amplifier also has a second input end, which is electrically connected to the control module and is used to receive the transmission signal.

[0011] Furthermore, the first coupler also has a second output end, and the second output end of the first coupler is electrically connected to the control module to transmit the power parameter signal of the first RF transmitting unit to the control module; the second coupler also has a second output end, and the second output end of the second coupler is electrically connected to the control module to transmit the power parameter signal of the second RF transmitting unit to the control module.

[0012] Furthermore, the control module includes: a control chip, a power modulation unit and a power detection unit; the first output end of the control chip is electrically connected to the frequency generation module, and is used to generate and transmit a waveform configuration signal to the frequency generation module; the second output end of the control chip is electrically connected to the input end of the power modulation unit, and the output end of the power modulation unit is electrically connected to each RF transmission unit of the RF transmission module, and the control chip is used to control the power supply of each RF transmission unit through the power modulation unit to generate a transmission signal; the third output end of the control chip is electrically connected to the switch selection module; the fourth output end of the control chip is electrically connected to the frequency generation module, and is used to control the output RF signal power; the input end of the control chip is electrically connected to the output end of the power detection unit, and the input end of the power detection unit is electrically connected to the output end of the RF transmission module, and the power detection unit is used to monitor the power of each RF transmission unit of the RF transmission module, and the control chip adjusts the waveform configuration signal through the power monitoring of the power detection unit, and adjusts the power of the RF signal of the target waveform through the fourth output end of the control chip.

[0013] Further, the power modulation unit includes: a transistor, a first PMOS transistor, a second PMOS transistor, a third PMOS transistor, an NMOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, wherein the first end of the first resistor is electrically connected to the control chip, the second end of the first resistor is electrically connected to the first end of the second resistor, and the second end of the second resistor is also electrically connected to the base of the transistor, the emitter of the transistor is electrically connected to the second end of the second resistor and grounded, and the collector of the transistor is electrically connected to the control chip. The first end of the third resistor is electrically connected, the second end of the third resistor is connected to the output level signal, the collector of the transistor is also electrically connected to the gate of the first PMOS transistor, the source of the first PMOS transistor is electrically connected to the output level signal, the drain of the first PMOS transistor is electrically connected to the first end of the fourth resistor, the collector of the transistor is also electrically connected to the gate of the NMOS transistor, the source of the NMOS transistor is grounded, the drain of the NMOS transistor is electrically connected to the first end of the fourth resistor, the second end of the fourth resistor is electrically connected to the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected to the output level signal. The second end of the fourth resistor is also electrically connected to the gate of the second PMOS tube, the source of the second PMOS tube is electrically connected to the output level signal, the drain of the second PMOS tube is electrically connected to a radio frequency transmitting unit of the radio frequency transmitting module, and the first capacitor and the second capacitor are arranged in parallel between the drain of the second PMOS tube and a radio frequency transmitting unit of the radio frequency transmitting module, the first capacitor and the second capacitor are arranged in parallel, and one end of the first capacitor is grounded, and the first end of the second capacitor is grounded; the collector of the transistor is also electrically connected to the first end of the fifth resistor, and the fifth resistor The second end of the fifth resistor is electrically connected to the first end of the seventh resistor, the second end of the seventh resistor is electrically connected to the fourth power supply, the second end of the fifth resistor is also electrically connected to the gate of the third PMOS tube, the source of the third PMOS tube is electrically connected to the fourth power supply, the drain of the third PMOS tube is electrically connected to another RF transmitting unit of the RF transmitting module, the third capacitor and the fourth capacitor are arranged in parallel between the drain of the third PMOS tube and the other RF transmitting unit of the RF transmitting module, the third capacitor and the fourth capacitor are arranged in parallel, and one end of the third capacitor is grounded, and one end of the fourth capacitor is grounded.

[0014] Further, the power detection unit includes: a first operational amplifier, a second operational amplifier, a first detection diode, a second detection diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, an inductor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a second single-pole double-throw switch; wherein, one end of the moving contact of the second single-pole double-throw switch is electrically connected to the control chip, the first static contact of the second single-pole double-branch switch is electrically connected to the output end of the first operational amplifier and the first end of the tenth resistor, the inverting input end of the first operational amplifier is electrically connected to the second end of the tenth resistor and the first end of the ninth resistor, the second end of the ninth resistor is grounded, the non-inverting input end of the first operational amplifier is electrically connected to the first end of the eighth resistor, the first end of the sixth capacitor, and the negative electrode of the first detection diode, and the positive electrode of the first detection diode is electrically connected to the first end of the fifth capacitor , the second end of the fifth capacitor is electrically connected to a RF transmitting unit of the RF transmitting module, the second end of the eighth resistor is grounded, and the second end of the sixth capacitor is grounded; the second static contact of the second single-pole double-branch switch is electrically connected to the output end of the second operational amplifier and the first end of the thirteenth resistor, the inverting input end of the second operational amplifier is electrically connected to the second end of the thirteenth resistor and the first end of the twelfth resistor, the second end of the twelfth resistor is grounded, the non-inverting input end of the second operational amplifier is electrically connected to the first end of the eleventh resistor, the first end of the eighth capacitor, and the negative electrode of the second detection diode, the positive electrode of the second detection diode is electrically connected to the first end of the seventh capacitor and the first end of the inductor, the second end of the seventh capacitor is electrically connected to another RF transmitting unit of the RF transmitting module, the second end of the eleventh resistor is grounded, the second end of the eighth capacitor is grounded, and the second end of the inductor is grounded.

[0015] Through one or more of the above embodiments of the present invention, at least the following technical effects can be achieved:

[0016] In the technical solution disclosed in the present invention, the signal transmission between the control module and the frequency generating module can be used so that the frequency generating module can generate a radio frequency signal of a target waveform, and the signal transmission between the control module and the radio frequency transmitting module can use different radio frequency transmitting units of the radio frequency transmitting module to transmit radio frequency signals of different frequency bands, and the signal interaction between the control module and the switch module can switch the conduction of the radio frequency unit of the radio frequency transmitting module, so that the radio frequency transmitting module can switch between different transmission frequency bands. Therefore, when testing the anti-interference capability of radars in different frequency bands, there is no need to use different test systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 A schematic block diagram of the structure of a radar interference test system provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a radar interference test system provided by an embodiment of the present invention;

[0020] Figure 3 A circuit diagram of a power modulation unit of a radar jammer test system provided by an embodiment of the present invention;

[0021] Figure 4 A circuit diagram of a power detection unit of a radar interference test system provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] A1, control module; A2, frequency generation module; A3, RF transmission module; A4, switch selection module; 1, crystal oscillator; 2, waveform generator; 3, loop low-pass filter; 4, voltage-controlled oscillator; 5, frequency multiplier; 6, digital attenuator; A31, first RF transmission unit; A32, second RF transmission unit; 7, control chip; 8, first single-pole double-throw switch; 9, first single-pole single-throw switch; 10, second single-pole single-throw switch; 11, first power amplifier; 12, first coupler; 13, first power divider; 14, triple frequency multiplier; 15, second power amplifier; 16, second coupler; 17, second power divider; 18, power modulation unit; 19, 24GHz RF antenna; 20, 76~81GHz RF antenna; 21, power detection unit; BJT1, transistor; PMOS1, first P MOS tube; PMOS2, the second PMOS tube; PMOS3, the third PMOS tube; NMOS, NMOS tube; R1, the first resistor; R2, the second resistor; R3, the third resistor; R4, the fourth resistor; R5, the fifth resistor; R6, the sixth resistor; R7, the seventh resistor; C1, the first capacitor; C2, the second capacitor; C3, the third capacitor; C4, the fourth capacitor; AMP1, the first operational amplifier; AMP2, the second operational amplifier; D1, the first detection diode; D2, the second detection diode; C5, the fifth capacitor; C6, the sixth capacitor; C7, the seventh capacitor; C8, the eighth capacitor; L1, the inductor; R8, the eighth resistor; R9, the ninth resistor; R10, the tenth resistor; R11, the eleventh resistor; R12, the twelfth resistor; R13, the thirteenth resistor; SW1, the second single-pole double-throw switch. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiment of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0026] With the popularization of autonomous driving assistance systems such as adaptive cruise control, lane keeping, and automatic braking, the safety of vehicle-mounted millimeter-wave radar is particularly important as an important part of the system. Radar has good anti-interference ability and can improve the safety of the entire system, so it must undergo anti-interference testing during design. At present, the mainstream operating frequency bands of vehicle-mounted millimeter-wave radar and traffic millimeter-wave radar are 76-81GHz and 24-24.25GHz respectively. In order to evaluate the anti-interference ability of the radar, it is necessary to conduct interference testing on the radar within the working frequency band. However, the current millimeter-wave radar interference test system only supports single frequency band operation. Testing the anti-interference ability of radars in different frequency bands requires two different test systems.

[0027] Therefore, the current radar interference test system has at least the following disadvantages:

[0028] 1) It is impossible to implement dual-band (76-81GHz and 24-24.25GHz) interference test function in one interference test system;

[0029] 2) Two sets of test systems are required to complete the testing of two different bands, which increases the cost, volume and is relatively more complicated to operate.

[0030] The present application embodiment provides a radar interference test system, which can solve the above problems, as follows:

[0031] Figure 1 The radar interference test system provided by an embodiment of the present invention is shown, comprising: a control module A1, a frequency generating module A2, a radio frequency transmitting module A3 and a switch selecting module A4, wherein the control module A1 is used to generate a waveform configuration signal, a conduction signal and a transmitting signal;

[0032] The frequency generating module A2 is used to receive the waveform configuration signal and generate a radio frequency signal of a target waveform;

[0033] The RF transmitting module A3 is used to receive the RF signal of the target waveform, amplify the RF signal of the target waveform, receive the transmission signal, and transmit the amplified RF signal, and the RF transmitting module A3 includes at least two RF transmitting units, and different RF transmitting units amplify RF signals of different waveforms correspondingly;

[0034] The switch selection module A4 is used to receive the conduction signal and the RF signal of the target waveform, to turn on the RF transmitting unit corresponding to the RF signal of the target waveform, to transmit the RF signal of the target waveform to the RF transmitting module A3, and to disconnect the RF transmitting unit that does not correspond to the RF signal of the target waveform.

[0035] The radar interference test system provided in the embodiment of the present application can use the signal transmission between the control module A1 and the frequency generating module A2, so that the frequency generating module A2 can generate a radio frequency signal of a target waveform, and the signal transmission between the control module A1 and the radio frequency transmitting module A3 can use different radio frequency transmitting units of the radio frequency transmitting module A3 to transmit radio frequency signals of different frequency bands, and the signal interaction between the control module A1 and the switch module can switch the conduction of the radio frequency unit of the radio frequency transmitting module A3, so that the radio frequency transmitting module A3 can switch between different transmission frequency bands. Therefore, when testing the anti-interference capability of radars in different frequency bands, there is no need to use different test systems.

[0036] In some embodiments, the RF transmitting module A3 is also used to generate a power parameter signal, the control module A1 is also used to receive the power parameter signal to monitor the transmission power of the RF transmitting module A3, and the control module A1 is also used to adjust the transmission power of the RF transmitting module A3 according to the power parameter signal.

[0037] In this embodiment, by transmitting the power parameter signal of the RF transmitting module A3 to the control module A1, the control module A1 can monitor the transmission power of the RF transmitting module A3 and then adjust the transmission power of the RF transmitting module A3.

[0038] In some embodiments, the frequency generating module A2 includes: a crystal oscillator 1, a waveform generator 2, a loop low-pass filter 3, a voltage-controlled oscillator 4, a frequency multiplier 5 and a digitally controlled attenuator 6, and the waveform configuration signal includes a waveform generating signal, wherein the crystal oscillator 1 is electrically connected to the first signal input terminal of the waveform generator 2, the second signal input terminal of the waveform generator 2 is electrically connected to the control module A1 for receiving the waveform generating signal, the signal output terminal of the waveform generator 2 is electrically connected to the signal input terminal of the loop low-pass filter 3, the signal output terminal of the loop low-pass filter 3 is electrically connected to the signal input terminal of the voltage-controlled oscillator 4, the signal output terminal of the voltage-controlled oscillator 4 is electrically connected to the third signal input terminal of the waveform generator 2, and the signal output terminal of the voltage-controlled oscillator 4 is electrically connected to the signal input terminal of the frequency multiplier 5, the signal output terminal of the frequency multiplier 5 is electrically connected to the first signal input terminal of the digitally controlled attenuator 6, and the signal output terminal of the digitally controlled attenuator 6 is electrically connected to the switch selection module A4.

[0039] In this embodiment, the crystal oscillator 1 is a 100MHz crystal oscillator, which can provide a reference clock signal for the waveform generator 2. The model of the waveform generator 2 can be ADF4169, which has a low-noise digital phase detector inside, and can generate the sawtooth wave and triangle wave required by the system. The output end of the waveform generator 2 is connected to the input end of the voltage-controlled oscillator 4 through the loop low-pass filter 3. The voltage-controlled oscillator 4 outputs a 12-13.5GHz signal. One end is connected to the RF input end of the waveform generator 2 to form a feedback loop to adjust the frequency accuracy of the output, and the other end is connected to the input end of the frequency multiplier 5, wherein the frequency multiplier 5 is a double frequency multiplier 5. The frequency multiplier 5 multiplies the signal frequency from 12-13.5GHz to 24-27GHz and outputs it to the input port of the digital attenuator 6, and then outputs it to the switch selection module A4 through the digital attenuator 6. The maximum frequency range of the frequency generation module A2 is 24-27GHz, which can reach a RF bandwidth of 3GHz. At the same time, the RF bandwidth can be configured to any value not greater than 3GHz according to different waveform requirements.

[0040] In some embodiments, the waveform configuration signal also includes a power adjustment signal; the second signal input terminal of the digitally controlled attenuator 6 is electrically connected to the control module A1 for receiving the power adjustment signal and adjusting the power of the frequency generating module A2.

[0041] In this embodiment, the control module A1 is electrically connected to the digitally controlled attenuator 6, and can transmit a power adjustment signal to the digitally controlled attenuator 6, so that the frequency generating module A2 can generate signals of different power values, so that the RF transmitting module A3 can transmit RF signals of different powers.

[0042] In some embodiments, the RF transmitting module A3 includes two RF transmitting units, namely a first RF transmitting unit A31 and a second RF transmitting unit A32, the first RF transmitting unit A31 is a 24 GHz RF transmitting unit, and the second RF transmitting unit A32 is a 76-81 GHz RF transmitting unit, and the switch module includes: a first single-pole double-throw switch 8, a first single-pole single-throw switch 9 and a second single-pole single-throw switch 10, wherein the first input end of the first single-pole double-throw switch 8 is electrically connected to the frequency generating module A2 for receiving the RF signal of the target waveform, and the second input end of the first single-pole double-throw switch 8 is electrically connected to the control module A1 for receiving the conduction signal;

[0043] The input end of the first single-pole single-throw switch 9 is electrically connected to the first output end of the first single-pole double-throw switch 8, and the output end of the first single-pole single-throw switch 9 is electrically connected to the first RF transmitting unit A31; the input end of the second single-pole single-throw switch 10 is electrically connected to the second output end of the first single-pole double-throw switch 8, and the output end of the second single-pole single-throw switch 10 is electrically connected to the second RF transmitting unit A32.

[0044] In this embodiment, the input end of the first single-pole double-throw switch 8 is connected to the output end of the digital control attenuator 6. The function of the single-pole double-throw switch is to select different RF transmission units through the MCU GPIO interface control. When a 24GHz RF transmission unit is used, the switch is switched to the RF1 path; when a 76-81GHz RF transmission unit is used, the switch is switched to the RF2 path. Two single-pole single-throw switches are respectively connected to the two output ports of the first single-pole double-throw switch 8. The function of the single-pole single-throw switch is to improve the isolation of the single-pole double-throw switch to ensure that the signals between systems do not interfere with each other.

[0045] In some embodiments, the first RF transmitting unit A31 includes: a first power amplifier 11, a first coupler 12, a first power divider 13 and a 24 GHz RF antenna 19, wherein the first input end of the first power amplifier 11 is electrically connected to the output end of the first single-pole single-throw switch 9, the output end of the first power amplifier 11 is electrically connected to the input end of the first coupler 12, the first output end of the first coupler 12 is electrically connected to the input end of the first power divider 13, and the output end of the first power divider 13 is electrically connected to the 24 GHz RF antenna 19; the first power amplifier 11 also has a second input end, which is electrically connected to the control module A1 for receiving the transmission signal; the second RF transmitting unit A32 includes: a triple A frequency multiplier 14, a second power amplifier 15, a second coupler 16, a second power divider and a 76-81 GHz RF antenna 20, wherein the input end of the triple frequency multiplier 14 is electrically connected to the output end of the second single-pole single-throw switch 10, the output end of the triple frequency multiplier 14 is electrically connected to the first input end of the second power amplifier 15, the output end of the second power amplifier 15 is electrically connected to the input end of the second coupler 16, the first output end of the second coupler 16 is electrically connected to the input end of the second power divider 17, and the output end of the second power divider 17 is electrically connected to the 76-81 GHz RF antenna 20; the second power amplifier 15 also has a second input end, which is electrically connected to the control module A1 for receiving the transmit signal.

[0046] In the first RF transmitting unit A31 of the present embodiment, the input end of the first power amplifier 11 is connected to the output end of the first single-pole single-throw switch 9. The operating frequency band of the first power amplifier 11 is 24-27 GHz, which can amplify the input 24-27 GHz RF signal, increase the power of the output signal, and ensure that the system has a longer interference distance and generates interference of sufficient intensity. The maximum RF bandwidth supports 3 GHz, which can be configured as needed, for example, 24-24.25 GHz. The output end of the first power amplifier 11 is connected to the input end of the first coupler 12. The function of the first coupler 12 is to couple a small part of the output power through the coupling port and perform power monitoring through power detection. The coupling degree of the first coupler 12 is usually set to 30 dB. The output end of the first coupler 12 is connected to the input end of the first power divider 13. The first power divider 13 divides the power of the output signal into two equal parts, which are respectively connected to two 24 GHz RF antennas 19, and the signal is radiated into space through the antenna.

[0047] In the second RF transmitting unit A32 of the present embodiment, the input end of the triple frequency multiplier 14 is connected to the output end of the second single-pole single-throw switch 10, and the 24-27GHz signal output by the switch is frequency multiplied, and the maximum range can output 72-81GHz RF signals, with a 9GHz RF bandwidth. The input end of the second single power amplifier is connected to the output end of the triple frequency multiplier 14. The operating frequency band of the second single power amplifier is 72-81GHz. Since the regulatory frequency band of the vehicle-mounted millimeter-wave radar is 76-81GHz, a 76-81GHz power amplifier can be selected to reduce costs and selection difficulty; the second single power amplifier can amplify the input 76-81GHz RF signal, increase the power of the output signal, and ensure that the system has a longer interference distance and generates interference of sufficient intensity. The maximum RF bandwidth supports 9GHz and can be configured as needed, for example, configured to 76-81GHz. The output end of the second single power amplifier is connected to the input end of the second single coupler. The function of the second single coupler is to couple a small part of the output power through the coupling port for power detection for power monitoring. The coupling degree of the second single coupler is usually set to 30dB. The output end of the second single coupler is connected to the input end of the power divider. The second single power divider divides the power of the output signal into two equal parts, which are respectively connected to two 76-81GHz RF antennas 20, and radiate the signal into space through the antenna.

[0048] In some embodiments, the first coupler 12 also has a second output end, and the second output end of the first coupler 12 is electrically connected to the control module A1 to transmit the power parameter signal of the first RF transmitting unit A31 to the control module A1; the second coupler 16 also has a second output end, and the second output end of the second coupler 16 is electrically connected to the control module A1 to transmit the power parameter signal of the second RF transmitting unit A32 to the control module A1.

[0049] In this embodiment, the first coupler 12 and the second coupler 16 can respectively transmit the power parameters of the first RF transmitting unit A31 and the second RF transmitting unit A32 to the control module A1, so that the control module A1 can monitor the transmission power of the RF transmitting module A3 and then adjust the transmission power of the RF transmitting module A3.

[0050] In some embodiments, the control module A1 includes: a control chip 7, a power modulation unit 18 and a power detection unit 21; the first output end of the control chip 7 is electrically connected to the frequency generation module A2, and is used to generate and transmit a waveform configuration signal to the frequency generation module A2; the second output end of the control chip 7 is electrically connected to the input end of the power modulation unit 18, and the output end of the power modulation unit 18 is electrically connected to each RF transmitting unit of the RF transmitting module A3, and the control chip 7 is used to control the power supply of each RF transmitting unit through the power modulation unit 18 to generate a transmitting signal; the third output end of the control chip 7 Electrically connected to the switch selection module A4; the fourth output end of the control chip 7 is electrically connected to the frequency generating module A2, and is used to control the output RF signal power; the input end of the control chip 7 is electrically connected to the output end of the power detection unit 21, and the input end of the power detection unit 21 is electrically connected to the output end of the RF transmitting module A3, and the power detection unit 21 is used to monitor the power of each RF transmitting unit of the RF transmitting module A3, and the control chip 7 adjusts the waveform configuration signal through the power monitoring of the power detection unit 21, and adjusts the power of the RF signal of the target waveform through the fourth output end of the control chip 7.

[0051] In this embodiment, the control chip 7 can use an MCU. The MCU is used as a main control chip and is connected to the waveform generator 2 through an SPI interface to configure the waveform of the waveform generator 2; the GPIO interface of the MCU is connected to the digitally controlled attenuator 6, and the output power can be configured according to the requirements; the GPIO interface of the MCU is connected to the input of the power modulation module to control the power supply of the power modulation module; the ADC interface of the MCU is connected to the output interface of the power detection module, which is used to collect the output power of the transmitting system. The output end of the power modulation module is respectively connected to the power supply ports of the two power amplifiers to control the power supply of the power amplifiers. The two input ends of the power detection module are respectively connected to the coupling ports of the two couplers to monitor the output power. The MCU can collect the real-time output power through the ADC interface, and can also control the output power by controlling the digitally controlled attenuator 6 to meet the use requirements.

[0052] In some embodiments, see Figure 3The power modulation unit 18 includes: a transistor BJT1, a first PMOS tube PMOS1, a second PMOS tube PMOS2, a third PMOS tube PMOS3, an NMOS tube NMOS, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4, wherein a first end of the first resistor R1 is electrically connected to the control chip 7, and a second end of the first resistor R1 is electrically connected to the first resistor C1. The first end of the second resistor R2 is electrically connected, and the second end of the second resistor R2 is also electrically connected to the base of the transistor BJT1, the emitter of the transistor is electrically connected to the second end of the second resistor R2 and grounded, the collector of the transistor BJT1 is electrically connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the output level signal, the collector of the transistor BJT1 is also electrically connected to the gate of the first PMOS tube PMOS1, the source of the first PMOS tube PMOS1 is electrically connected to the output level signal, and the first P The drain of the MOS tube PMOS1 is electrically connected to the first end of the fourth resistor R4, the collector of the transistor BJT1 is also electrically connected to the gate of the NMOS tube NMOS, the source of the NMOS tube NMOS is grounded, the drain of the NMOS tube NMOS is electrically connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is electrically connected to the first end of the sixth resistor R6, the second end of the sixth resistor R6 is electrically connected to the output level signal, the second end of the fourth resistor R4 is also electrically connected to the gate of the second PMOS tube PMOS2, the source of the second PMOS tube PMOS2 is electrically connected to the output level signal, the drain of the second PMOS tube PMOS2 is electrically connected to a radio frequency transmitting unit of the radio frequency transmitting module A3, and the first capacitor C1 and the second capacitor C2 are arranged in parallel between the drain of the second PMOS tube PMOS2 and a radio frequency transmitting unit of the radio frequency transmitting module A3, the first capacitor C1 and the second capacitor C2 are arranged in parallel, and one end of the first capacitor C1 is grounded, and the first end of the second capacitor C2 is grounded;The collector of the transistor BJT1 is also electrically connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is electrically connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is electrically connected to the fourth power supply, the second end of the fifth resistor R5 is also electrically connected to the gate of the third PMOS tube PMOS3, the source of the third PMOS tube PMOS3 is electrically connected to the fourth power supply, the drain of the third PMOS tube PMOS3 is electrically connected to another RF transmitting unit of the RF transmitting module A3, the third capacitor C3 and the fourth capacitor C4 are arranged in parallel between the drain of the third PMOS tube PMOS3 and the other RF transmitting unit of the RF transmitting module A3, the third capacitor C3 and the fourth capacitor C4 are arranged in parallel, and one end of the third capacitor C3 is grounded, and one end of the fourth capacitor C4 is grounded. ;

[0053] In this example, when the MCU GPIO interface outputs a high level, BJT1 is turned on, causing PMOS1 and PMOS3 to be turned on, and NMOS1 to be turned off, so PMOS2 cannot be turned on, and the PA in the 24GHz RF transmitter unit cannot be powered on. PMOS3 is turned on, and the PA in the 76-81GHz transmitter system is powered on normally; when the MCU GPIO interface outputs a low level, BJT1 is turned off, causing PMOS1 and PMOS3 to be turned off, and NMOS1 is turned on, so PMOS2 is turned on, and the PA in the 24GHz transmitter system is powered on normally, and PMOS3 is turned off, and the PA in the 76-81GHz transmitter system cannot be powered on. The power modulation module only powers on the PA that needs to be used, which reduces the power consumption and heat generation of the entire system. The transistor BJT1, the first resistor R1, the second resistor R2 and the third resistor R3 form a level conversion circuit. Usually, the MCU GPIO output high level is 1.8 / 3.3V, which may not be able to drive the subsequent circuit. Through this circuit, it can be converted into a high level of 5V output; R1 is the base resistor, R2 is the voltage divider resistor, which can increase the closing speed of the transistor BJT1, and R3 is a pull-up resistor, R3 is selected to be 3.3K. PMOS1 and NOMS1 form an inverting circuit, which makes the input signal high and low level flip, resulting in PMOS2 and PMOS3 can only conduct one way. PMOS2, the fourth resistor R4, the sixth resistor R6, the first capacitor C1, and the second capacitor C2 form a 24GHz system PA power switch circuit to control the PA power supply to power on, wherein the fourth resistor R4 plays the role of absorbing ringing, and usually uses a resistance value of less than 100 ohms; the sixth resistor R6 is a pull-up resistor; the first capacitor C1 and the second capacitor C2 are filter capacitors. Similarly, PMOS3, the fifth resistor R5, the seventh resistor R7, the third capacitor C3, and the fourth capacitor C4 form a 76-81GHz system PA power switch circuit to control the PA power supply to power on, wherein the fifth resistor R5 plays a role in absorbing ringing, and a resistance value of less than 100 ohms is usually selected; the seventh resistor R7 is a pull-up resistor; the third capacitor C3 and the fourth capacitor C4 are filter capacitors.

[0054] In some embodiments, see Figure 4The power detection unit 21 includes: a first operational amplifier AMP1, a second operational amplifier AMP2, a first detection diode D1, a second detection diode D2, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, an inductor L1, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a second single-pole double-throw switch SW1; wherein one end of the moving contact of the second single-pole double-throw switch SW1 is electrically connected to the control chip 7, The first static contact of the second single-pole double-branch switch is electrically connected to the output end of the first operational amplifier AMP1 and the first end of the tenth resistor R10, the inverting input end of the first operational amplifier AMP1 is electrically connected to the second end of the tenth resistor R10 and the first end of the ninth resistor R9, the second end of the ninth resistor R9 is grounded, the non-inverting input end of the first operational amplifier AMP1 is electrically connected to the first end of the eighth resistor R8, the first end of the sixth capacitor C6, and the cathode of the first detection diode D1, the anode of the first detection diode D1 is electrically connected to the fifth capacitor C6, and the cathode of the first detection diode D1 is electrically connected to the fifth capacitor C6. The first end of C5 is electrically connected, the second end of the fifth capacitor C5 is electrically connected to a radio frequency transmitting unit of the radio frequency transmitting module A3, the second end of the eighth resistor R8 is grounded, and the second end of the sixth capacitor C6 is grounded; the second static contact of the second single-pole double-branch switch is electrically connected to the output end of the second operational amplifier AMP2 and the first end of the thirteenth resistor R13, the inverting input end of the second operational amplifier AMP2 is electrically connected to the second end of the thirteenth resistor R13 and the first end of the twelfth resistor R12, the second end of the twelfth resistor R12 is grounded, the non-inverting input end of the second operational amplifier AMP2 is electrically connected to the first end of the eleventh resistor R11, the first end of the eighth capacitor C8, and the negative electrode of the second detection diode D2, the positive electrode of the second detection diode D2 is electrically connected to the first end of the seventh capacitor C7 and the first end of the inductor L1, the second end of the seventh capacitor C7 is electrically connected to another radio frequency transmitting unit of the radio frequency transmitting module A3, the second end of the eleventh resistor R11 is grounded, the second end of the eighth capacitor C8 is grounded, and the second end of the inductor L1 is grounded.

[0055] In this embodiment, the fifth capacitor C5, the sixth capacitor C6, the first detector diode D1, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10 and the first operational amplifier AMP1 form a 24GHz transmission system power detection amplifier circuit; the fifth capacitor C5 is a DC isolation capacitor; the sixth capacitor C6 is a filter capacitor to filter out high-frequency components; the eighth resistor R8 is a load resistor; the tenth resistor R10 is a feedback resistor; the first operational amplifier AMP1 can amplify small signals. The seventh capacitor C7, the eighth capacitor C8, the second detector diode D2, the inductor L1, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13 and the second operational amplifier AMP2 form a 76-81GHz transmission system power detection amplifier circuit; the seventh capacitor C7 is a DC isolation capacitor; the eighth capacitor C8 is a filter capacitor to filter out high-frequency components; the inductor L1 is used for matching and can expand the frequency bandwidth; the eleventh resistor R11 is a load resistor; the thirteenth resistor R13 is a feedback resistor; the second operational amplifier AMP2 can amplify small signals. The second single-pole double-throw switch SW1 is used to select the 24GHz transmission system power detection circuit and the 76-81GHz transmission system power detection circuit. The data of the turned-on channel is sampled by the MCU ADC to monitor the output power of the system.

[0056] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A radar jammer test system, characterized in that: include: control module, frequency generation module, RF transmission module and switch selection module, wherein: The control module is used to generate a waveform configuration signal, a conduction signal and a transmission signal; The frequency generating module is used to receive the waveform configuration signal and generate a radio frequency signal of a target waveform; The RF transmitting module is used to receive the RF signal of the target waveform, amplify the RF signal of the target waveform, receive the transmission signal, and transmit the amplified RF signal, and the RF transmitting module includes at least two RF transmitting units, and different RF transmitting units amplify RF signals of different waveforms correspondingly; The switch selection module is used to receive the conduction signal and the RF signal of the target waveform, to turn on the RF transmitting unit corresponding to the RF signal of the target waveform, to transmit the RF signal of the target waveform to the RF transmitting module, and to disconnect the RF transmitting unit that does not correspond to the RF signal of the target waveform.

2. The radar interference test system as claimed in claim 1, characterized in that: The RF transmitting module is also used to generate a power parameter signal, the control module is also used to receive the power parameter signal to monitor the transmission power of the RF transmitting module, and the control module is also used to adjust the transmission power of the RF transmitting module according to the power parameter signal.

3. The radar interference test system as claimed in claim 1, characterized in that: The frequency generation module includes: a crystal oscillator, a waveform generator, a loop low-pass filter, a voltage-controlled oscillator, a frequency multiplier, and a digitally controlled attenuator. The waveform configuration signal includes a waveform generation signal, wherein: The crystal oscillator is electrically connected to the first signal input terminal of the waveform generator, the second signal input terminal of the waveform generator is electrically connected to the control module for receiving the waveform generation signal, the signal output terminal of the waveform generator is electrically connected to the signal input terminal of the loop low-pass filter, the signal output terminal of the loop low-pass filter is electrically connected to the signal input terminal of the voltage-controlled oscillator, the signal output terminal of the voltage-controlled oscillator is electrically connected to the third signal input terminal of the waveform generator, and the signal output terminal of the voltage-controlled oscillator is electrically connected to the signal input terminal of the frequency multiplier, the signal output terminal of the frequency multiplier is electrically connected to the first signal input terminal of the digitally controlled attenuator, and the signal output terminal of the digitally controlled attenuator is electrically connected to the switch selection module.

4. The radar interference test system as claimed in claim 3, characterized in that: The waveform configuration signal also includes a power adjustment signal; The second signal input terminal of the digitally controlled attenuator is electrically connected to the control module and is used to receive the power adjustment signal and adjust the power of the frequency generating module.

5. The radar interference test system as claimed in claim 1, characterized in that: The RF transmission module includes two RF transmission units, namely a first RF transmission unit and a second RF transmission unit. The switch module includes a first single-pole double-throw switch, a first single-pole single-throw switch and a second single-pole single-throw switch. The first input end of the first single-pole double-throw switch is electrically connected to the frequency generating module for receiving the radio frequency signal of the target waveform, and the second output end of the first single-pole double-throw switch is electrically connected to the control module for receiving the conduction signal; The input end of the first single-pole single-throw switch is electrically connected to the first output end of the first single-pole double-throw switch, and the output end of the first single-pole single-throw switch is electrically connected to the first radio frequency transmitting unit; The input end of the second single-pole single-throw switch is electrically connected to the second output end of the first single-pole double-throw switch, and the output end of the second single-pole single-throw switch is electrically connected to the second radio frequency transmitting unit.

6. The radar interference test system as claimed in claim 5, characterized in that: The first RF transmitting unit includes: a first power amplifier, a first coupler, a first power divider and a 24 GHz RF antenna, wherein the first input end of the first power amplifier is electrically connected to the output end of the first single-pole single-throw switch, the output end of the first power amplifier is electrically connected to the input end of the first coupler, the first output end of the first coupler is electrically connected to the input end of the first power divider, and the output end of the first power divider is electrically connected to the 24 GHz RF antenna; the first power amplifier also has a second input end, which is electrically connected to the control module and is used to receive the transmission signal; The second RF transmitting unit includes: a triple frequency multiplier, a second power amplifier, a second coupler, a second power divider and a 76-81 GHz RF antenna, wherein the input end of the triple frequency multiplier is electrically connected to the output end of the second single-pole single-throw switch, the output end of the triple frequency multiplier is electrically connected to the first input end of the second power amplifier, the output end of the second power amplifier is electrically connected to the input end of the second coupler, the first output end of the second coupler is electrically connected to the input end of the second power divider, and the output end of the second power divider is electrically connected to the 76-81 GHz RF antenna; the second power amplifier also has a second input end, which is electrically connected to the control module for receiving the transmission signal.

7. The radar interference test system as claimed in claim 6, characterized in that: The first coupler also has a second output end, and the second output end of the first coupler is electrically connected to the control module to transmit the power parameter signal of the first RF transmitting unit to the control module; The second coupler also has a second output end, and the second output end of the second coupler is electrically connected to the control module to transmit the power parameter signal of the second radio frequency transmitting unit to the control module.

8. The radar interference test system according to claim 1, characterized in that: The control module includes: a control chip, a power modulation unit and a power detection unit; The first output end of the control chip is electrically connected to the frequency generating module, and is used to generate and transmit a waveform configuration signal to the frequency generating module; the second output end of the control chip is electrically connected to the input end of the power modulation unit, and the output end of the power modulation unit is electrically connected to each RF transmitting unit of the RF transmitting module, and the control chip is used to control the power supply of each RF transmitting unit through the power modulation unit to generate a transmitting signal; the third output end of the control chip is electrically connected to the switch selection module; the fourth output end of the control chip is electrically connected to the frequency generating module, and is used to control the output RF signal power; the input end of the control chip is electrically connected to the output end of the power detection unit, and the input end of the power detection unit is electrically connected to the output end of the RF transmitting module, and the power detection unit is used to monitor the power of each RF transmitting unit of the RF transmitting module, and the control chip adjusts the waveform configuration signal through the power monitoring of the power detection unit, and adjusts the power of the RF signal of the target waveform through the fourth output end of the control chip.

9. The radar interference test system as claimed in claim 8, characterized in that: The power modulation unit includes: a triode, a first PMOS tube, a second PMOS tube, a third PMOS tube, an NMOS tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, wherein: The first end of the first resistor is electrically connected to the control chip, the second end of the first resistor is electrically connected to the first end of the second resistor, and the second end of the second resistor is also electrically connected to the base of the transistor, the emitter of the transistor is electrically connected to the second end of the second resistor and is grounded, the collector of the transistor is electrically connected to the first end of the third resistor, the second end of the third resistor is connected to the output level signal, the collector of the transistor is also electrically connected to the gate of the first PMOS tube, the source of the first PMOS tube is electrically connected to the output level signal, the drain of the first PMOS tube is electrically connected to the first end of the fourth resistor, the collector of the transistor is also electrically connected to the gate of the NMOS tube, the source of the NMOS tube is grounded, The drain of the NMOS tube is electrically connected to the first end of the fourth resistor, the second end of the fourth resistor is electrically connected to the first end of the sixth resistor, the second end of the sixth resistor is electrically connected to the output level signal, the second end of the fourth resistor is also electrically connected to the gate of the second PMOS tube, the source of the second PMOS tube is electrically connected to the output level signal, the drain of the second PMOS tube is electrically connected to a radio frequency transmitting unit of the radio frequency transmitting module, and the first capacitor and the second capacitor are arranged in parallel between the drain of the second PMOS tube and the radio frequency transmitting unit of the radio frequency transmitting module, the first capacitor and the second capacitor are arranged in parallel, and one end of the first capacitor is grounded, and the first end of the second capacitor is grounded; The collector of the triode is also electrically connected to the first end of the fifth resistor, the second end of the fifth resistor is electrically connected to the first end of the seventh resistor, the second end of the seventh resistor is electrically connected to the fourth power supply, the second end of the fifth resistor is also electrically connected to the gate of the third PMOS tube, the source of the third PMOS tube is electrically connected to the fourth power supply, the drain of the third PMOS tube is electrically connected to another RF transmitting unit of the RF transmitting module, the third capacitor and the fourth capacitor are arranged in parallel between the drain of the third PMOS tube and the other RF transmitting unit of the RF transmitting module, the third capacitor and the fourth capacitor are arranged in parallel, and one end of the third capacitor is grounded, and one end of the fourth capacitor is grounded.

10. The radar interference test system according to claim 8, characterized in that: The power detection unit includes: a first operational amplifier, a second operational amplifier, a first detection diode, a second detection diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, an inductor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a second single-pole double-throw switch; wherein, One end of the moving contact of the second single-pole double-throw switch is electrically connected to the control chip, the first static contact of the second single-pole double-branch switch is electrically connected to the output end of the first operational amplifier and the first end of the tenth resistor, the inverting input end of the first operational amplifier is electrically connected to the second end of the tenth resistor and the first end of the ninth resistor, the second end of the ninth resistor is grounded, the non-inverting input end of the first operational amplifier is electrically connected to the first end of the eighth resistor, the first end of the sixth capacitor, and the negative electrode of the first detection diode, the positive electrode of the first detection diode is electrically connected to the first end of the fifth capacitor, the second end of the fifth capacitor is electrically connected to a radio frequency transmitting unit of the radio frequency transmitting module, the second end of the eighth resistor is grounded, and the second end of the sixth capacitor is grounded; The second static contact of the second single-pole double-branch switch is electrically connected to the output end of the second operational amplifier and the first end of the thirteenth resistor, the inverting input end of the second operational amplifier is electrically connected to the second end of the thirteenth resistor and the first end of the twelfth resistor, the second end of the twelfth resistor is grounded, the non-inverting input end of the second operational amplifier is electrically connected to the first end of the eleventh resistor, the first end of the eighth capacitor, and the negative electrode of the second detection diode, the positive electrode of the second detection diode is electrically connected to the first end of the seventh capacitor and the first end of the inductor, the second end of the seventh capacitor is electrically connected to another RF transmitting unit of the RF transmitting module, the second end of the eleventh resistor is grounded, the second end of the eighth capacitor is grounded, and the second end of the inductor is grounded.

Images