175 results about "Radiofrequency microwave" patented technology

The planar coaxial transmission line comprises a signal line, an upper layer metal ground, a lower layer metal ground, a plated-through hole, a dielectric substrate and a shielding cover, the upper layer metal ground and the lower layer metal ground are arranged on the upper surface and the lower surface of the dielectric substrate respectively, and the plated-through hole is connected with the upper layer metal ground and the lower layer metal ground. The signal line and the upper-layer metal ground are located on the same plane, a medium groove is arranged between the upper-layer metal ground and the signal line, and a shielding cover is arranged above the signal line and is connected with the upper-layer metal ground. The planar coaxial transmission line can be applied to implementation of a radio frequency microwave circuit module and system with low loss and high shielding performance, and can be directly interconnected and integrated with an existing planar transmission line circuit, an existing coaxial line circuit, an existing electronic component and an existing chip device, electromagnetic shielding isolation is improved, electromagnetic signal transmission is enhanced, and the transmission efficiency is improved. And the size and weight of the circuit module and the system are simplified, the reliability is higher, the design is simpler, and the cost is lower.

The invention discloses a multi-band filter S parameter testing method and system based on segmented scanning, and relates to the technical field of radio frequency microwave testing. The method comprises the following steps: controlling a digital channel board card to drive a radio frequency switch through an upper computer, expanding radio frequency ports of a vector network analyzer, and enabling the number of the radio frequency ports to be matched with that of filter ports to be tested; test channels are divided according to the number of filter ports and test requirements, a segmentation parameter table and calibration parameters are configured for each channel, the segmentation parameter table comprises sub-segment scanning parameters, and the number of sub-segment scanning points is adjusted according to passband and stopband characteristics; the vector network analyzer performs segmented scanning on each channel based on the parameters; and the upper computer obtains the S parameter curve from the vector network analyzer to complete the test. The method can improve the S parameter testing efficiency and precision of the multi-band filter, and is suitable for mass production testing.

The invention provides an electric tungsten fire needle tumor ablation system, and the system comprises an image navigation module which is used for integrating CT / MRI / ultrasonic images, constructing a three-dimensional tumor model in real time, tracking a target region through electromagnetic positioning, and dynamically calibrating a needle insertion path; the insulating tungsten fire needle execution module is used for adopting a high-density tungsten alloy needle body and a multi-axis mechanical arm to control multi-angle puncture; the energy output module is used for intelligently adjusting radio frequency / microwave power and releasing energy in a pulse mode; and the temperature control feedback module is used for monitoring the temperature in real time and automatically terminating overheating energy. According to the technical scheme, accurate, safe and effective ablation of tumors is achieved.

The invention relates to the technical field of radio frequency microwave measurement, in particular to a tested piece harmonic test link and an active load traction system and method.The system comprises a control module and a test link. Determining a test signal value of the vector signal source in the test link and a phase adjustable signal value of the first adjustable phase vector signal source according to the target mismatch degree; then, a plurality of impedance points on the Smith chart are simulated by adjusting the amplitude and the phase of the first adjustable phase vector signal source, the vector signal source is controlled to send out a test signal value, and the first adjustable phase vector signal source is controlled to send out a phase adjustable signal value, so that a tested piece is tested; and finally, obtaining a harmonic value corresponding to each impedance point, and obtaining the maximum harmonic of the tested piece under the target mismatch degree according to the harmonic value corresponding to each impedance point. According to the invention, the impedance adjusting range and precision are higher, and the adjusting speed is higher.

The present application discloses a phase shift circuit and a radio frequency microwave system. The phase shift circuit may comprise: a first node circuit, a second node circuit, and a first signal channel and a second signal channel coupled between the first node circuit and the second node circuit, wherein the first node circuit is configured to split an input signal so as to simultaneously output a first differential signal to the first signal channel and a second differential signal to the second signal channel; the first signal channel and the second signal channel are implemented on the basis of a differential circuit architecture, and are configured to respectively perform signal attenuation and / or quadrant transformation on the first differential signal and the second differential signal, so as to implement phase shift; the second node circuit is configured to synthesize a first phase-shifted signal output by the first signal channel and a second phase-shifted signal output by the second signal channel so as to obtain an output signal; and the phase difference between the output signal and the input signal is within the range of 0-360 degrees.

The invention relates to the technical field of cable manufacturing, in particular to a lightweight radio frequency microwave cable and a manufacturing method thereof, and the method comprises the steps: obtaining a silver-plated copper conductor; extruding the PTFE microporous medium through a pushing machine, and coating the silver-plated copper conductor with the PTFE microporous medium through a stretching machine to form a medium layer; a silver-plated flat copper strip is spirally wound on a PTFE microporous medium to form an outer conductor, and whether the spiral winding process of the silver-plated flat copper strip is qualified or not is determined based on a deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium. Determining to increase the extrusion temperature or extrusion pressure of the extruder according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold value; 1 / 2 of a polyimide aluminum foil is wound on the outer conductor to form an electromagnetic shielding layer, a silver-plated copper wire is woven outside the electromagnetic shielding layer to form a woven shielding layer, and a fluoroplastic sheath is extruded outside the woven shielding layer to form a sheath, so that the manufacturing efficiency of the radio frequency microwave cable dielectric layer is improved.

The invention discloses a packaging structure of a microwave photon transceiving integrated device, which comprises a tube shell, the tube shell comprises a cavity, a driving circuit board is arranged in the cavity, the driving circuit board is respectively connected with a light receiving unit, a light emitting unit and a radio frequency microwave circuit, the light receiving unit is connected with the light emitting unit through the radio frequency microwave circuit, and the light receiving unit is connected with the light emitting unit through the radio frequency microwave circuit. The bottom of the cavity is connected with the fuzz button, the fuzz button is connected with the radio frequency microwave circuit, the light receiving unit and the light emitting unit are integrated in one cavity, receiving and emitting of microwave signals are integrated in one cavity, the integration level is improved, the fuzz button with the smaller size is used for replacing an SSMP radio frequency connector, and the cost is reduced. The size of the whole device is reduced, the size of the microwave photonic device is reduced, and the problems that receiving and transmitting of microwave signals are achieved based on discrete devices, the integration level is low, external interfaces all adopt SSMP radio frequency connectors or glass sintering terminals, and the size of the microwave photonic device is large are solved.

The invention relates to the technical field of radio frequency microwaves, in particular to a reconfigurable radio frequency MEMS attenuator based on an attenuation network, which comprises a plurality of attenuation units, the attenuation units are sequentially connected in series and mounted on a substrate, and the output ends of the attenuation units are provided with signal output lines; the attenuation unit is provided with a Y-type power divider, the input end of the Y-type power divider is connected with a signal input line, the output end of the Y-type power divider is connected with an attenuation circuit and a straight-through circuit in parallel, and the output ends of the attenuation circuit and the straight-through circuit are connected with the signal output line; and the attenuation network is arranged on the attenuation circuit. According to the invention, the parasitic effect can be inhibited and the reflection effect can be reduced.

The invention discloses a single-power-supply ultra-wideband temperature compensation low-noise amplifier circuit, and belongs to the technical field of radio frequency microwaves. The circuit is mainly composed of a pre-stage low-noise amplifier module, an inter-stage temperature compensation equalization module and a post-stage driving amplifier module. The temperature compensation equalizer module generates differential voltage related to temperature through a three-stage gallium arsenide diode temperature sensing unit, outputs a control signal through an enhanced FET differential amplification circuit, drives a voltage-controlled attenuation equalizer to dynamically adjust the attenuation amount of a radio frequency signal, and achieves gain stability in a frequency band. Through the collaborative design of a blocking capacitor and a divider resistor, the grid bias of an FET switch is strictly limited in a transconductance linear adjustment interval, and the interval covers 80% of the effective range of the threshold voltage of a gallium arsenide FET tube. The circuit is powered by a single power supply + 5V, stable work of each module is ensured through active bias and a power supply filter network, and the circuit is suitable for extreme temperature environments such as high-frequency communication and radar.

The invention belongs to the field of high-performance materials, and discloses a high-thermal-conductivity PBO fiber and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a PBO polymer solution with a conventional molecular weight; (2) preparing an ultra-high molecular weight PBO polymer solution; (3) mixing the two PBO polymer solutions in a double-screw extruder according to a certain proportion to obtain a PBO spinning solution; (4) preparing as-spun PBO fibers by adopting a dry-wet liquid crystal spinning process and a condensed state structure regulation and control means; and (5) washing, drying, oiling and winding the as-spun PBO fiber to obtain the high-thermal-conductivity PBO fiber. According to the method, a small amount of the ultra-high molecular weight PBO polymer is added into the conventional spinning solution, the heat conduction performance of the PBO fiber is remarkably improved through the induced orientation crystallization effect of an ultra-high molecular weight PBO long chain, and the method has good application prospects in the field of high-power radio frequency microwave circuits with high requirements for heat dissipation capacity.

The invention belongs to the technical field of radio frequency microwave functional components, and particularly relates to a pouring type integrated transformer, an internal matching component and a preparation method thereof, the pouring type integrated transformer comprises a microstrip impedance line of a multilayer spiral structure, a soft magnetic ferrite pouring body located outside the microstrip impedance line, and leading-out terminals arranged at the two ends of the microstrip impedance line; the micro-strip impedance line is arranged on a substrate with a certain dielectric constant requirement and forms a spiral structure along a set path, the micro-strip impedance line and the substrate of the micro-strip impedance line are coated with the soft magnetic ferrite pouring body, the soft magnetic ferrite pouring body is of an integrally formed structure, and the soft magnetic ferrite pouring body is obtained by mixing soft magnetic ferrite powder and a binder, pouring the mixture in a mold and carrying out curing demolding. Through the innovative structural design and preparation process, the technical bottlenecks of large size, low efficiency, inconsistency, difficulty in packaging and the like existing in a traditional manual winding matching mode are overcome, and a feasible technical scheme is provided for miniaturization, high performance and large-scale application of a power amplifier matching network in a radio frequency microwave system.

The invention relates to the field of materials, in particular to a PTFE copper-clad plate with a multi-layer structure and a preparation method of the PTFE copper-clad plate. The PTFE copper-clad plate comprises an outermost copper foil layer, a middle high-heat-conductivity tear-resistant layer and a high-adhesion heat-conducting layer between the outermost copper foil layer and the middle high-heat-conductivity tear-resistant layer. The PTFE copper-clad plate disclosed by the invention has high heat-conducting property, high adhesive property and low dielectric loss, is suitable for a high-frequency, high-speed and high-power radio-frequency microwave environment, and ensures stable transmission of high-frequency signals and long-term safe operation of devices.

The invention discloses a broadband high-power transmitting and receiving circuit and device, and belongs to the field of radio frequency microwaves. When the circuit works in a transmitting state, a radio frequency signal enters from a transmitting input port, enters a power amplifier I and a power amplifier II through a bridge I, enters a bridge II after being amplified by the power amplifier I and the power amplifier II, and is transmitted to a power amplifier II; the load I and the load II are respectively connected to the isolation ends of the electric bridge I and the electric bridge II so as to ensure port impedance matching of the electric bridges; when the radio frequency signal is synthesized into the maximum power through the second bridge and then enters the straight-through port of the high-power coupler for power output, the high-power coupler is in an emission coupling state at the moment, the third load is connected to the output port of the emission coupling branch of the high-power coupler, and the coupled emission signal is absorbed by the third load. And the receiving link is an isolation end of the coupling branch. The problem of receiving and transmitting passive switching of the high-power receiving and transmitting assembly under the ultra wide band can be solved.

The present invention relates to the field of radio frequency and microwave technologies, and particularly relates to an integrated tunable filter, which includes a tunable filter body. An input strip line, an output strip line, a coupling strip line group, and a YIG thin film structure group are arranged in the tunable filter body. The input strip line can transmit signals to the output strip line through the coupling strip line group and the YIG thin film structure group. Among them, multiple green ceramic sheets are also arranged in the tunable filter body, and the multiple green ceramic sheets are laminated and sintered into a coupling cavity of the tunable filter body. Metal circuit images can be printed on the green ceramic sheets, and resonant cavities for placing the YIG thin film structure group can be dug out on the green ceramic sheets. By arranging each functional component on the green ceramic sheets and then using the LTCC process, the filter can be made into an integrated form, and the assembly is also simpler. There is no need for additional processing of strip lines, etc. Slots can be directly opened on the green ceramic sheets, and the fixation and position control of the YIG thin film structure are more precise, without subsequent adjustment.

The present invention provides a voltage-controlled group delay adjustment module, a digital control adjustment circuit and a radio frequency microwave circuit, including: a filter, receiving an input signal, for selecting a working frequency band and filtering out interference signals; a negative group delay unit, connected to the output end of the filter, for transmitting a signal and adjusting the negative group delay characteristics of the signal; a first varactor diode, connected to the main path of the negative group delay unit, for adjusting the group delay characteristics based on the reverse bias of the first varactor diode; a transformer, a primary coil receiving a first tuning voltage, a secondary coil connected to both ends of the first varactor diode, for voltage-changing and adjusting the first tuning voltage and applying it to both ends of the first varactor diode to change the reverse bias of the first varactor diode. The present invention effectively adjusts the group delay characteristics of the circuit through voltage regulation, and is used for group delay characteristic compensation of filters, amplifiers and even radio frequency microwave circuits, and also realizes more accurate digital control regulation by configuring a peripheral DAC circuit.

The application discloses a metal sheet integrated waveguide structure which is a full-metal structure and is formed by stacking at least three metal substrates arranged from bottom to top, wherein air cavities filled with air are formed on at least one internal metal substrate by cutting off parts, and the metal substrates are connected to form a self-encapsulated structure. The metal sheet integrated waveguide structure technology can generate a multi-layer self-encapsulated structure, and independent circuit design can be performed on each layer to realize high-performance radio frequency, microwave and terahertz electricity; the full-metal integrated platform can fully utilize the low-loss and high-Q characteristics of the metal structure, and can create a circuit structure with good electromagnetic shielding and excellent heat dissipation performance.

The invention discloses a radio frequency microwave frequency multiplier which comprises an input resonance filter network, an oscillation amplification network and an output resonance filter network, the oscillation amplification network is adopted as a core architecture, and high power and high gain in a microwave frequency band can be achieved. And meanwhile, the self-adaptive linearization feedback network is used for adjusting the linearity component of the stacked field effect transistors at the bottom layer of the self-bias negative feedback amplification network, so that the whole radio frequency microwave frequency multiplier obtains good high gain, high linearity and high power output capability.

The present application belongs to the technical field of radio frequency microwave integrated circuit design, and specifically relates to a wideband full duplex receiver sharing an interference cancellation circuit. The full duplex receiver of the present application is composed of a receiver module and an interference cancellation circuit. The receiver comprises a transconductance, a mixer, a transimpedance amplifier and a frequency conversion loop. The interference cancellation circuit comprises an input matching network, an input down-mixer, a quadrature selection phase shifter and a baseband variable gain low-pass filter. The interference cancellation circuit transfers the adjustment of the delay and gain in the radio frequency domain to the baseband, so that the overall area and power consumption are small, and the delay amount of 3.86-8.33 ns can be realized in a wide radio frequency band of 0.5-3.5 GHz. Meanwhile, the interference cancellation circuit is synthesized by the mixer in the frequency conversion loop of the receiver to form a double-path cancellation mode, which avoids the interference cancellation circuit being directly connected to the front end of the receiver module, and the noise figure deterioration of the receiver module is very small, only 0.9-1.2 dB.

A chronic and / or acute system and methods of minimally invasive ablation with wire structure devices dispensed through a needle without open cut downs or laparoscopy and using energy forms including radiofrequency, microwave and direct current.

The invention provides a radio frequency microwave power amplifier over-standing wave protection system and a protection method thereof. The system comprises a bidirectional coupling module, a dual-path detection module, a signal processing module and a protection execution module, wherein the bidirectional coupling module is used for collecting a forward radio frequency power analog signal and a reverse radio frequency power analog signal; the dual-path detection module is used for generating a forward detection voltage analog signal based on the forward radio frequency power analog signal and generating a reverse detection voltage analog signal based on the reverse radio frequency power analog signal; the signal processing module is used for generating an actual standing-wave ratio based on the forward detection voltage analog signal and the reverse detection voltage analog signal, and generating a control protection signal according to the actual standing-wave ratio; and the protection execution module is used for performing power-off protection on the to-be-protected radio frequency microwave power amplifier based on the control protection signal. The problem that an existing radio frequency microwave power amplifier over standing wave protection scheme cannot be suitable for complex application scenes can be solved.

This invention discloses a radio frequency millimeter-wave phase-to-voltage converter, belonging to the field of radio frequency microwave integrated circuit technology. The converter includes: a first and second frequency divider chain for dividing two input signals to achieve phase compression; a first and second quadrature generator for providing a -90° linearized bias; a three-state coupling network connected between the two frequency divider chains to eliminate phase mode ambiguity introduced by the frequency dividers through reconfigurable coupled phase; and a symmetrical phase detector for converting the linearized phase difference into a voltage signal output. This invention compresses the ±180° phase difference to a small angle range using phase compression technology, combined with linearized bias to allow the phase detector to operate in the linear region, and utilizes the three-state coupling network to achieve unambiguous detection across the entire 360° phase range. Implemented using a 40nm CMOS process, it requires no external clock, has no inductor design, a core area of ​​only 0.016mm², power consumption of 22mW, a response speed of 120ns, and a linearity of 1.05% FSR.

The invention relates to a manufacturing method of a power amplifier for improving power back-off efficiency, which belongs to the technical field of radio frequency microwave circuits, and comprises the following steps: step 1, based on load characteristics of an active device, determining an optimal efficiency impedance point under linear output power as optimal impedance of amplifier design; step 2, pulling out the determined optimal impedance by using a load pulling technology or LOADPULL, and drawing the optimal impedance on an SMITH original drawing; 3, based on the optimal impedance obtained through traction, low-loss impedance matching is achieved through the equal Q matching technology, loss and bandwidth are compatible, and impedance change and frequency band shaping are completed; 4, a two-stage or multi-stage amplification structure is adopted, and nonlinear compensation is realized by controlling grid voltages of front-stage and back-stage active devices and utilizing front-stage and back-stage gain compression and expansion characteristics; the method has the beneficial effects that the linear output power optimal efficiency impedance point is selected as the optimal impedance of the amplifier design, and the amplifier maintains higher linear output power and has higher rollback efficiency.

The invention discloses an LC filter circuit based on an artificial neural network in the technical field of radio frequency microwaves, and the LC filter circuit comprises a capacitor array, each capacitor is connected with an independent power switch tube; an inductor array, wherein each inductor is connected with an independent power switch tube; by controlling the on and off states of the power switch tube, the variable adjustment of the equivalent capacitance value of the capacitor array and the variable adjustment of the equivalent inductance value of the inductor array can be realized; and the control unit comprises an artificial neural network, an input layer of the artificial neural network receives input parameters related to input signal characteristics, and the input layer of the artificial neural network is connected with the control ends of the power switch tubes. Input parameters of the LC filter circuit pass through an artificial neural network and then output control parameters to control each power switch tube, so that dynamic adjustment of the filter circuit is realized, accurate filtering of signals with different frequencies can be realized, and the filtering effect of the system is improved.

The invention discloses an ultra-wideband silicon-based phase shifter chip working at 0.2-2GHz, which is applied to the technical field of radio frequency microwave integrated circuits. The architecture of the chip consists of a fully differential amplifier, an orthogonal signal generator, a vector synthesis network and a digital-to-analog conversion control circuit. According to the chip, within the working frequency band of 0.2-2 GHz, the phase shifting precision can be 5.625 degrees, the phase shifting range can be 360 degrees, the phase RMS error is smaller than 2.7 degrees, the amplitude RMS error is smaller than 0.6 dB, the input and output return losses are smaller than 12 dB, the gain is larger than-0.5 dB, and the area of the chip is 0.88 mm < 2 >.

The application discloses a kind of through type radio frequency microwave vector analysis device and method, device includes radio frequency front end and down conversion module, digital acquisition and processing module and control and interactive module.Radio frequency front end and down conversion module are used for the transmission of radio frequency signal, two-way coupling sampling and coherent down conversion;Digital acquisition and processing module are used for collecting signal and processing, obtain pure incident wave signal and reflected wave signal;Control and interactive module are used for controlling each module, and carry out man-machine interaction.The application is realized by using through type measurement architecture, under the premise that the signal transmission of measured system is not interrupted, realizes the online vector analysis of radio frequency signal, and does not need built-in signal source, and then complete vector parameter such as reflection coefficient, impedance, standing wave ratio can be accurately calculated.

The invention discloses a method for automatically stabilizing the phase of a broadband radio frequency microwave channel, which belongs to the technical field of radio frequency microwave communication and comprises the following steps: acquiring stability characteristic data of the phase of the broadband radio frequency microwave channel; generating a phase stability index according to the stability characteristic data of the phase of the broadband radio frequency microwave channel; judging whether the phase of the broadband radio frequency microwave channel is stable or not according to the phase stability index; if the phase of the broadband radio frequency microwave channel is unstable, obtaining potential abnormal source feature data of the phase of the broadband radio frequency microwave channel, and generating an optimization decision target value; establishing an optimal optimization decision analysis model according to the optimization decision target value, and generating an optimal optimization decision; according to the optimal optimization decision, optimizing the potential abnormal source of the phase of the broadband radio frequency microwave channel; according to the invention, the phase stability and the system reliability of the broadband radio frequency microwave channel are obviously improved, and the optimal configuration of maintenance resources is realized at the same time.

The invention discloses a BGA chip vertical interconnection test module based on a fur button, comprising a base, a PCB circuit board is installed inside the base, an external interface, a first SMA connector and a second SMA connector are embedded on the surface of the PCB circuit board; a fur button module is arranged on the surface of the PCB circuit board, and a radio frequency microwave detection body distributed in a rectangular array is built into the fur button module, the bottom end of the radio frequency microwave detection body is electrically connected to the PCB circuit board, and the radio frequency microwave detection body is a fur button connector; an upper cover plate assembly is movably mounted on the top of the fur button module, and the upper cover plate assembly comprises an outer base body and a floating component; the invention realizes impedance matching and reduces discontinuity through an inner conductor structure, and based on the telescopic characteristics of the fur button, the radio frequency microwave detection body does not need to be welded, but is connected between the radio frequency microwave detection body, the BGA chip to be tested and the PCB board in a crimping manner, so that microwave signals and electrical signals are well matched and transmitted, and signal mismatch phenomenon is reduced.

The utility model relates to the technical field of radio equipment, in particular to a radio frequency microwave signal source output stability enhancing device which comprises an outer protective frame, rod shafts are fixedly connected to the middle of the left end and the middle of the right end of the outer protective frame respectively, and the outer protective frame is movably connected with a long handle in a penetrating mode through the two rod shafts jointly. The upper portion of the left end and the upper portion of the right end of the long handle are both movably connected with screws in a threaded mode, the upper portion of the left end and the upper portion of the right end of the outer protective frame are both provided with rectangular inserting grooves with the rear ends penetrating through, and the left portion and the right portion of the upper end of the outer protective frame are both provided with T-shaped inserting grooves with the rear ends penetrating through. According to the radio frequency microwave signal source output stability enhancing device provided by the utility model, components such as the outer protective frame, the water tank, the heat dissipation bottom frame and the condenser pipe are arranged, and a transistor amplifier and a band-pass filter are arranged on the radio frequency microwave signal source machine; therefore, normal operation of the machine body and signal enhancement can be realized under the combined action of the accessories.

The invention discloses a plasma auxiliary excitation method, a plasma generating device and a plasma generating system, an auxiliary excitation device is used for performing auxiliary excitation on a plasma torch, the auxiliary excitation device comprises an excitation source, a first electrode and a second electrode, and the first electrode and the second electrode are electrically connected with the two ends of the excitation source respectively; when the excitation source is switched on, the first electrode and the second electrode discharge to generate electric arc; discharge ends of the first electrode and the second electrode are arranged in a working gas inlet channel of the plasma torch or outside a torch flame nozzle. The device is suitable for various plasma torches with radio frequency / microwave energy feed-in, electric arcs or plasmas generated by discharging between the electrodes are used for assisting excitation to generate plasmas, and after the plasma torches are assisted to excite torch flames, even if the first electrode and the second electrode are disconnected with the excitation source, torch flame maintenance of the plasma torches is not affected.

The application discloses a liquid metal-based radio frequency coaxial cable connector, which comprises a Type-N male head at one end, a Type-N female head at the other end and liquid metal connecting the Type-N male head and the Type-N female head; the Type-N male head is fixed on a swing arm of a thrust measuring device, the Type-N female head is fixed on a base of the thrust measuring device, the liquid metal connects the Type-N male head and the Type-N female head and realizes radio frequency / microwave power transmission, and the Type-N male head rotates coaxially relative to the Type-N female head. By adopting the liquid metal bridging and zero stiffness coaxial cable connection mode, the influence of the coaxial cable on the torsional pendulum stiffness is significantly reduced, the torsional pendulum can more accurately measure the small thrust of an electric thruster, and the thrust measurement precision is improved; the liquid metal-based connector design realizes good impedance matching, ensures efficient transmission of radio frequency / microwave power, reduces the loss in the signal transmission process and improves the working efficiency of the electric thruster.