135 results about "Varicap" patented technology

The invention relates to a reconfigurable dual-mode leaky-wave antenna with global scanning capability and a reconfiguration method, the leaky-wave antenna comprises a double-layer slow-wave waveguide structure formed by an upper metal conductor and a lower metal conductor, and the upper metal conductor and the lower metal conductor are separated by a dielectric substrate; the double-layer slow-wave waveguide structure comprises a plurality of periodic units, and a plurality of T-shaped structures with opposite directions are processed on upper and lower layers of metal conductors of each periodic unit to form a plurality of grooves; a variable capacitance diode is embedded into the tail end of a slot arm of the upper-layer metal conductor and is electrically connected with the lower-layer metal conductor through a metal via hole, and a closed loop is formed between the upper-layer metal conductor and the lower-layer metal conductor; a plurality of elliptical radiation patches are arranged at the top of a slot arm of the lower metal conductor at intervals and used for radiation leakage of the slow wave waveguide, and continuous frequency scanning covering 180 degrees is achieved; according to the invention, two modes of frequency scanning and fixed-frequency scanning are fused, 180-degree global scanning can be realized in any frequency reconfigurable interval, and beams can be flexibly reconstructed through multiple control strategies under a fixed-frequency condition.

The invention discloses a linear polarization scattering reconfigurable array antenna, which belongs to the technical field of antenna manufacturing and comprises an antenna unit, an extension socket, a transmission type phase shifter and an inductor. The antenna unit comprises a radiation patch, a first dielectric substrate, a metal via hole, a metal patch, a second dielectric substrate, a perforated metal floor, a third dielectric substrate, a feed metal column and a radio frequency coaxial connector, the radio frequency coaxial connector is connected with the radiation patch through the feed metal column, and a variable capacitance diode and a capacitor are arranged on the transmission type phase shifter. The transmission type phase shifter is connected with the radiation patch through the feed metal column, the variable capacitance diode is connected with the punching metal floor, the bottom of the third dielectric substrate is provided with a direct current bias line, the direct current bias line is connected with the transmission type phase shifter through the inductor, and the transmission type phase shifter is connected with the radiation patch through the feed metal column. According to the invention, flexible regulation and control of antenna scattering beams can be realized, and the antenna has the characteristics of flexible control, fast response speed and high radiation efficiency.

The invention discloses a broadband circularly polarized scattering reconfigurable array antenna based on variable capacitance diode loading, and the broadband circularly polarized scattering reconfigurable array antenna is composed of a plurality of scattering reconfigurable antenna units. The scattering reconfigurable antenna unit comprises a resonance structure used for radiating or receiving signals and a feed and phase shift structure arranged on the lower surface of the resonance structure. The feed and phase shift structure comprises a broadband directional coupler and a reflection type broadband phase shifter. When the scattering reconfigurable antenna unit is in a radiation working state, the broadband directional coupler radiates energy to the resonant structure; when the scattering reconfigurable antenna unit is in a scattering working state, the broadband directional coupler transmits energy to the reflection type broadband phase shifter, and the reflection type broadband phase shifter regulates energy of secondary radiation of the reflection type broadband phase shifter according to bias voltage applied to an internal variable capacitance diode. The array antenna provided by the invention is wide in working frequency band, and the radiation performance can be ensured while the scattering characteristic is reconfigurable.

A nonlinear transmission line (NLTL) comprises a plurality of interconnected transmission line cells, each including a shunt path and a transmission line length wherein the shunt path includes a varactor diode and an inductor coupled in series with the varactor diode. A shunt path transmission line may be coupled in the shunt path and one or more filters may be coupled to an input and / or an output of the NLTL.

The invention belongs to the technical field of integrated circuits, and discloses a high-selectivity constant-bandwidth reconfigurable filter chip based on a GaAs (gallium arsenide) process, which comprises a dielectric substrate, a multilayer metal structure, a plurality of folded opening-shaped metal microstrip lines, a plurality of grounding metal columns, a variable capacitance diode, an MIM (metal injection molding) capacitor and the like. Resonance is realized in a mode of combining electric coupling and magnetic coupling, a variable capacitance diode is utilized to tune the center frequency, and the bandwidth is kept constant in the tuning process. Transmission zeros are introduced at two sides of a passband through cross coupling, so that the frequency selectivity and the spectrum management capability are remarkably improved, and meanwhile, the optimization of the microstrip interconnection structure effectively reduces the system loss. According to the invention, the strict requirements of a modern radio frequency communication system on miniaturization, high performance and high selectivity can be met, and extremely high adjustability and adaptability are achieved.

This application discloses an intelligent reflective surface and a covert communication system, belonging to the field of wireless communication technology. The intelligent reflective surface includes multiple intelligent reflective surface units arranged in an array; each intelligent reflective surface unit includes: a first substrate, a second substrate, and a third substrate; a metal patch and a varactor diode, located on the side of the third substrate opposite to the second substrate; the metal patch includes a first patch and a second patch, and the varactor diode is located between the first patch and the second patch, with its negative and positive terminals electrically connected to the first patch and the second patch, respectively; a metal ground plane, located between the first substrate and the second substrate; a first bias line and a second bias line, located on the side of the first substrate opposite to the second substrate; the first bias line is electrically connected to the metal ground plane and the first patch, respectively, and the second bias line is electrically connected to the second patch. This application can achieve precise control of electromagnetic waves, reduce electromagnetic energy loss, improve energy transmission efficiency, suppress electromagnetic wave leakage, and improve communication covertness.

The application discloses a variable-beam control method of a variable capacitance diode-based element grating leaky-wave antenna, and comprises the following steps: S1, researching and analyzing an ultra-grating beam conversion mechanism; researching the mechanism of a planar ultra-grating under anisotropic, uniform and continuous periodic boundary conditions; S2, according to the ultra-grating, researching a transmission mode and optimization design of a Floquet-Bloch theorem; researching an FB mode, and eliminating the bad FB mode by designing a tool for ultra-grating parameters; S3, analyzing and designing the ultra-grating leaky-wave antenna; researching the analytical field and current of the synthesized ultra-grating in the framework of the leaky-wave antenna, so as to customize the performance of phase, beam shape and polarization; S4, designing and analyzing an electrically-tuned beam control ultra-grating leaky-wave antenna; the application adopts the variable-beam control method of the variable capacitance diode-based element grating leaky-wave antenna, adopts a simple structure of a tunable material to tune an efficient structure platform, and lays a road for a new generation of efficient special gratings.

The application discloses an implementation device and method of a controllable nonreciprocal circuit, and the device comprises a vector network analyzer, a left coupling capacitor, a right coupling capacitor and a nonlinear LC resonant cavity, wherein the resonant frequency of the nonlinear LC resonant cavity is jointly regulated by a direct current bias voltage loaded on a varactor diode and a microwave signal. The application utilizes the difference in coupling efficiency of microwave energy coupled into the nonlinear LC resonant cavity when the microwave signal is transmitted forward and reversely, and utilizes the regulation of the direct current bias voltage on the nonlinear interaction between the microwave signal and the LC resonant cavity mode in the nonlinear LC resonant cavity, so that the nonlinear LC resonant cavity can be in different bistable states when the microwave signal is transmitted forward and reversely, and thus the controllable nonreciprocal transmission with high contrast can be realized for the microwave signal in a larger working bandwidth.

The application discloses a SAR two-dimensional multi-phase segmented modulation interference method based on time modulation metasurface, and relates to the technical field of signal processing. In the application, each metasurface unit is combined with two open reverse and symmetrical metal square rings and varactor diodes, so that the phase, amplitude and polarization state of the incident electromagnetic wave are flexibly regulated and controlled. The dynamic regulation and control capability enables the metasurface to adjust the response to the electromagnetic wave in real time according to the requirements of different application scenarios, so that the electromagnetic environment is accurately controlled. The structure of the application only uses two open reverse and symmetrical metal square rings and varactor diodes, so that the phase, amplitude and polarization state of the incident electromagnetic wave are flexibly regulated and controlled, and the electromagnetic environment is accurately controlled. Compared with the traditional complex time modulation metasurface, the modulation performance of the time modulation metasurface is greatly improved, and high-precision SAR radar interference is realized.

The application discloses a multi-mode absorbing frequency selective surface with adjustable wave absorbing capacity, which comprises a metal pattern layer, a first dielectric substrate, a metal back plate, a second dielectric substrate and a metal feed line layer arranged in sequence from top to bottom, wherein the metal pattern layer comprises a plurality of metal unit structures arranged in an array, each metal unit structure comprises a polygonal metal sheet located at the center of the unit, metal bands extending from the periphery of the polygonal metal sheet, and metal arms extending from the four corners of the unit, the metal arms comprise two independent metal structures, the polygonal metal sheet and the metal bands are connected to each other through a first varactor diode, the two independent metal structures are connected to each other through a second varactor diode, and the metal arms in adjacent metal unit structures jointly form a new rotating cross structure. The independent feed line network is built through the metal through hole, so that the structure is divided into two independently regulated parts, and the whole has single and double adjustable wave absorbing modes.

This invention relates to a pattern-reconfigurable antenna based on artificial surface plasmon polaritons (SSPPs), belonging to the field of antenna technology. The antenna includes a coplanar waveguide feed line, a transition structure, a reconfigurable SSPP waveguide, and periodic radiating elements. The reconfigurable SSPP waveguide modifies the dispersion characteristics by adding a varactor diode to a traditional SSPP element and adjusting the capacitance value using a bias circuit. The periodic radiating elements are elliptical patches with rectangular slots, coupled to the reconfigurable SSPP waveguide to radiate electromagnetic waves. This invention solves the problems of single radiation direction in traditional antennas and low gain in existing reconfigurable antennas. It achieves fixed-frequency beam scanning (maximum 23°) and frequency beam scanning (maximum 90°) in the 11.5GHz-15GHz frequency band, with gains greater than 9dBi (maximum 11.1dBi), expanding the detection range and increasing the detection distance, making it suitable for fields such as UAV detection.

A varactor-tunable radio frequency (RF) resonant circuit is disclosed. The circuit includes a planar impedance-controlled transmission line disposed on a dielectric substrate, and a voltage-controlled varactor diode, or an arrangement of parallel varactor diodes, electrically connecting a resonator of the planar transmission line to a reference node. The resonator can have a stepped impedance. A frequency of the resonator is tunable by configuration of a reverse bias voltage applied to the first plurality of voltage-controlled varactor diodes.

The application discloses a double-passband low-frequency passband independently tunable frequency selective surface, metal columns pass through cross structure metal layers to connect upper and lower double-passband metal layers, form a multilayer cascade structure to expand bandwidth and adjust characteristics in the passband, the upper and lower double-passband metal layers include an outer metal frame and four branches in the outer metal frame, a variable capacitance diode is arranged on each branch, the side of the branch extends to the outer metal frame and / or the outer metal frame extends to the side of the branch to form a first gap; when direct current is fed through the metal columns, the variable capacitance diode provides a first capacitance, the first gap provides a second capacitance, the first capacitance is greater than the second capacitance, the first capacitance is used for controlling a low-frequency passband, and the second capacitance is used for controlling a high-frequency passband; when different direct currents are applied to the two ends of the variable capacitance diode, the low-frequency passband is moved, the high-frequency passband remains unchanged, and independent tuning of the low-frequency passband is realized.

Embodiments herein disclose an inductor-capacitor voltage controlled oscillator (LC-VCO) circuit. The LC-VCO circuit includes: an LC tank circuit including a center tap inductor connected in parallel with a capacitor bank without a varactor, where the LC tank circuit resonates to generate an oscillation voltage; and a control circuit connected to a varistor capacitance circuit, where the varistor capacitance circuit includes a varistor based on a voltage controlled transistor in series with at least one capacitor, the varistor capacitance circuit is connected in parallel with the LC tank circuit and connected to a negative transconductance circuit. The control circuit includes an error amplifier and a conversion circuit, and is configured to generate an output control voltage based on an input phase-locked loop (PLL) control voltage that controls a capacitance value of the varistor capacitance circuit through the variable resistor.

Described herein are switches with asymmetrical anti-series varactor pairs to improve switching performance. The disclosed switches can include asymmetrical varactor pairs to reduce distortions. The asymmetry in the varactor pairs can be associated with geometry of each varactor in the pair. The disclosed switches can stack both symmetrical and asymmetrical varactor pairs. The disclosed switches with asymmetrical anti-series varactor pairs can be configured to improve both H2 and H3 simultaneously.

The invention discloses a dual-mode phase shifter based on artificial surface plasmon. The dual-mode phase shifter comprises a dual-mode transmission structure, a dual-mode excitation structure and a direct current control structure, the dual-mode transmission structure realizes simultaneous transmission of an even mode and an odd mode in a single physical channel; the dual-mode excitation structure ensures efficient excitation of an even mode and an odd mode, the even mode is directly excited by a microstrip port, and the odd mode is indirectly excited by a microstrip-slot line coupling mode; the DC control structure realizes real-time control of two modes of the dual-mode transmission structure. According to the invention, simultaneous transmission of an even mode and an odd mode under the same frequency and a single physical channel is realized, and independent control of phase electromagnetic characteristics of the two modes is realized according to the control method after introduction of semiconductor devices such as a variable capacitance diode, so that independent phase shift of two paths of signals under the same frequency is realized simultaneously, and the signal transmission efficiency is improved. And the phase shift ranges of the two paths of signals both cover 360 degrees.

The invention discloses a low-mutual-coupling frequency-adjustable MIMO patch antenna. Wide and narrow metal strips loaded with a capacitor and a second variable capacitance diode and a rectangular metal patch loaded with a first variable capacitance diode are connected with an inverted-T-shaped metal patch. A second variable capacitance diode is used for regulating and controlling electric coupling between patch antenna units, a first variable capacitance diode is used for regulating and controlling the working frequency of the patch antenna units, and the ratio of the second variable capacitance diode to a mutual coupling zero point to the working frequency is faster than that of the first variable capacitance diode, so that the problem of mutual coupling zero point following is solved; the frequency-adjustable MIMO patch antenna with low mutual coupling is realized, and the decoupling depth in the process of adjustable bandwidth, continuous adjustability and frequency modulation can be considered.

An apparatus for characterizing a sample using nuclear quadrupole resonance (NQR) spectroscopy is described whereby a plurality of NQR detectors operate in tandem, whereby each NQR detector is optimized to operate within a designed frequency range, having the means to shuffle the sample from one NQR detector to the next such as an automatic sample changer, having the means of controlling the frequency and amplitude of the radiofrequency field generated by the NQR detector through motors controlling variable capacitors or through the use of varactor diodes, digital capacitors, or digital potentiometers, having a plurality of Zeeman modulation coils to create a magnetic field surrounding the sample which may be arranged to minimize stray fields, such as a toroid, having the means of operating the spectrometer in frequency modulation mode, and having the capability of configuring the device for either continuous-wave NQR or pulsed NQR.

This invention provides a wideband coded metasurface based on diffuse reflection effect, comprising: periodically arranged coded units printed on the surface of a dielectric substrate; each coded unit includes a periodically arranged first coded subunit and a second coded subunit; the first coded subunit includes right-angled triangular patches connected in pairs via varactor diodes; the second coded subunit includes right-angled triangular patches connected in pairs via rectangular microstrip patches; the designed coded metasurface has two operating states: a passive coded metasurface when not powered, and an active coded metasurface when powered. This invention features ultra-wideband diffuse reflection characteristics, achieving significant RCS reduction in the 25GHz–50GHz millimeter-wave range, while easily switching between passive and active operating states, and is easy to fabricate and conformally conform to.

The application discloses a response bandwidth measuring device and method of a capacitance type blade tip clearance measuring system based on a varactor, the capacitance type blade tip clearance measuring system is composed of a capacitance sensor, a measuring system host and an upper computer which are sequentially connected, the measuring system host comprises a signal demodulation module and an acquisition module, the capacitance sensor is composed of a sensor probe and a three coaxial cable which are connected with each other, the response bandwidth measuring device is connected with the three coaxial cable through an SMA joint after replacing the sensor probe, and a varactor is adopted to simulate the capacitance change caused by the blade tip sweeping through the capacitance sensor probe; the response bandwidth measuring device is composed of a varactor D, a resistor R1, a capacitor C1 and a capacitor C2; the two ends of the capacitor C2 connected in parallel with the varactor D are connected with the resistor R1 and the capacitor C1 in series respectively, the capacitor C1 is connected with the three coaxial cable, and the input end of the response bandwidth measuring device is connected with the resistor R1.

The application belongs to the microwave and millimeter wave technology and particularly relates to a substrate integrated waveguide electrically tunable concave type equalizer based on a varactor diode and a PIN diode, which comprises an SIW body, a gradually changing transition line and a 50Ω microstrip line. A rectangular area is arranged on the SIW body, four edges of the rectangular area adopt a groove structure, a plurality of resonance units are arranged on the grooves along two opposite long edges of the rectangular area at equal intervals, and capacitors are arranged on the grooves along two opposite wide edges of the rectangular area at equal intervals, so that the insertion loss at different frequencies is compensated to different degrees to realize the equalization effect. In the resonance unit, two chip capacitors introduced in the first adjusting structure cooperate with gold wires or inductors to realize the direct current blocking and alternating, PIN diodes introduced in the second adjusting structure replace microwave resistors to control the depth of the concave pits, and a reverse direct current voltage is applied to the varactor diode in the third adjusting structure to change the capacitance value of the varactor diode, so that the frequency of the concave pits is changed.

This disclosure relates generally to metasurface beam steering antenna and method of setting antenna beam angle. Conventional approaches perform electronically beam steering using phase array which requires bandwidth with higher data rates. The present disclosure enables metasurface antennas tilt antenna beam in a given direction, where the varactor diodes are operated in reverse bias so that different values of capacitors combination lead to electronic beam scanning. The processor of the metasurface beam steering antenna receives a command having an input angle to tilt the angle beam position. The processor processes the command by mapping the input angle with the set of c-shaped copper patch combination having the capacitor values using a predefined lookup table for setting the antenna beam angle based on a reference voltage generated by the varactor diode. The lookup table is iteratively updated with the capacitor values of the c-shaped copper patches.

The invention relates to a directional diagram reconfigurable antenna based on artificial surface plasmon polaritons, and belongs to the technical field of antennas. The antenna comprises a coplanar waveguide feeder line, a transition structure, a reconfigurable SSPP waveguide and a periodic radiation unit. According to the reconfigurable SSPP waveguide, a variable capacitance diode is added on a traditional SSPP unit, and a bias circuit is matched to regulate and control a capacitance value so as to change dispersion characteristics; the periodic radiation unit is an elliptical patch with a rectangular slot, and is coupled with the reconfigurable SSPP waveguide to radiate electromagnetic waves. According to the reconfigurable antenna, the problems that a traditional antenna is single in radiation direction and an existing reconfigurable antenna is low in gain are solved, fixed-frequency beam scanning (23 degrees to the maximum) and frequency beam scanning (90 degrees to the maximum) are achieved within the frequency band of 11.5-15 GHz, the gain is larger than 9 dBi (11.1 dBi to the maximum), the detection range can be expanded, the detection distance can be increased, and the reconfigurable antenna is suitable for the fields of unmanned aerial vehicle detection and the like.

The invention discloses a flexible self-compensation time-varying Doppler metasurface system and a radar detection deception method thereof, and relates to the technical field of flexible electronics, and the system comprises a plurality of flexible multi-layer metasurface units and a dynamic regulation and control module. The flexible multilayer metasurface unit is provided with a stretchable conductive patch layer, a flexible substrate layer, a positive electrode layer, a piezoelectric composite layer and a negative electrode layer from top to bottom, the patch layer is provided with a variable capacitance diode and a strain sensor, and the phase of a reflected wave is regulated and controlled by adjusting the bias voltage of the variable capacitance diode; the dynamic regulation and control module is composed of a signal processing unit, a resistance monitoring circuit and a bias network and achieves signal receiving, phase calculation and regulation and control. Meanwhile, a radar detection deception method is provided, a strain sensor and a resistance monitoring circuit are used for collecting data, a compensation phase is calculated in combination with a deformation quantity-resistance-phase model pre-stored in a signal processing unit, a variable capacitance diode is driven through signal conversion, and 0-360-degree phase continuous regulation and control are achieved.

The utility model discloses a capacitance liquid level sensor, which is mounted in a vacuum excrement collector of a sanitation system of a railway passenger vehicle, and comprises a protective shell, an inductive probe, a signal generation module, a signal conditioning module, an MCU (Microprogrammed Control Unit) control module and a power supply module, the signal generation module comprises a voltage follower, an oscillating circuit, a first NOT gate, a second NOT gate and other matched circuits; the oscillating circuit is composed of variable capacitance diodes, the first NOT gate is connected with the oscillating circuit in parallel, and the first NOT gate serves as an amplifier and provides gain for the oscillating circuit; the input end of the second NOT gate is connected with the output end of the first NOT gate, and the output end of the second NOT gate is connected with the inductive probe after passing through other matched circuits; the voltage follower amplifies the voltage of an input signal and outputs a signal with the same amplitude, and the output end of the voltage follower is connected with the oscillating circuit.

The utility model discloses a variable capacitance diode, and relates to the technical field of diodes, the variable capacitance diode comprises a substrate, a channel layer, a barrier layer and a cap layer, the channel layer, the barrier layer and the cap layer are sequentially stacked on the substrate, two-dimensional electron gas is formed at the interface of the channel layer and the barrier layer, the cap layer is divided into a first region and a second region, and the first region and the second region are arranged on the substrate. The first region is provided with a cathode, and the cathode and the second region are provided with passivation layers; the passivation layer in the second region is etched and sequentially penetrates through the cap layer and the barrier layer until the interior of the channel layer is exposed, so that the bottom wall of a formed etching groove is located in the channel layer, and the included angle between the side wall of the etching groove and the bottom wall is an obtuse angle; and anodes are arranged on the bottom wall and the side wall of the etching groove and on the passivation layer in the second region. The variable capacitance diode not only can enlarge the variable capacitance range, but also can realize large-range stable capacitance change.

An antenna tuner receives outputs of detectors coupled to an input and / or an output of each power amplifier (PA) of a plurality of PAs of a multiple antenna system. A processor of the antenna tuner is configured to process the detector outputs and to generate at least one of a gm gate bias value and a cascode gate bias value to be applied to gm and cascode gates, respectively, of a last stage of each of the PAs to change the shape of an input amplitude-to-output amplitude (AM-AM) response of each of the PAs independently of one another. The processor can also be configured to process the detector outputs to generate a varactor bias value to be applied to a terminal of a varactor of each of the PAs to change the shape of an input amplitude-to-output phase shift (AM-PM) response of each of the PAs independently of one another.

The invention discloses a super-surface based on a variable capacitance diode and a resonant cavity antenna. The super-surface comprises a super-surface unit, a first middle layer dielectric plate, a third metal isolation plate and a second middle layer dielectric plate of the metasurface unit form a middle layer; an upper layer dielectric plate, the middle layer and a lower layer dielectric plate are arranged in sequence, and gaps are formed between the upper and lower layer dielectric plates and the middle layer; the radiation patch and the first metal isolation plate are respectively arranged on two side surfaces of the upper dielectric plate, and the first metal isolation plate is opposite to the middle layer; the receiving patch and the second metal isolation plate are respectively arranged on two side surfaces of the lower dielectric plate, and the second metal isolation plate is opposite to the middle layer; the middle-layer dielectric plate is provided with a high-frequency connection path, the high-frequency connection path comprises a pair of trapezoidal metal patches which are oppositely arranged at intervals, the short edges of the trapezoidal metal patches are opposite, and a variable capacitance diode is connected in a gap between the short edges; and the direct-current feed line is connected with the high-frequency connection path to carry out direct-current feed on the variable capacitance diode. The metasurface can realize beam regulation and control of the resonant cavity antenna.

The application relates to a linearly polarized in-band co-polarized scattering reconfigurable array antenna, which comprises antenna modules arranged in an array by a plurality of same antenna units. Each antenna unit adopts a multi-layer stacked structure: from top to bottom, a radiation patch, a first dielectric substrate, a metal patch, a second dielectric substrate, a metal ground plate and a third dielectric substrate are sequentially arranged. A plurality of metalized through holes are arranged on the center line of the first dielectric substrate, and the metalized through holes, the metal patch and the metal ground plate jointly form a resonator. Each unit is also integrated with a reflective phase shifter, which comprises a microstrip transmission line, a feeding metal column, a metal short circuit column and a varactor diode. The feeding metal column penetrates through the layers and is connected with the radiation patch, and the metal short circuit column is connected with the metal ground plate. The varactor diode receives external control through a direct current bias line, the reflection phase of the unit is adjusted by changing the bias voltage, and the in-band co-polarized scattering reconfigurable function of the antenna is realized. The device can realize flexible regulation and control of a wide range and low coupling of scattering characteristics while maintaining high stable radiation characteristics.

The invention relates to the technical field of integrated circuits, in particular to a self-adaptive high-frequency resonant magnetic isolation solid-state switching circuit which comprises a driving circuit, a high-frequency resonant circuit and an output stage circuit. The driving circuit is used for driving the high-frequency resonance circuit; the high-frequency resonance circuit comprises a variable capacitance array C1, a capacitor C2, a transformer T1 and a diode D1; wherein the variable capacitance array C1 is used for eliminating the influence of input voltage change on output voltage and is composed of variable capacitance diode units connected in parallel and a capacitor C3 connected in parallel; the output stage circuit is used for outputting the voltage signal generated by the high-frequency resonance circuit; according to the invention, oscillator driving and variable capacitance array high-frequency resonance magnetic isolation circuit design is adopted; the variable capacitance array can restrain the large fluctuation of the output voltage along with the input voltage, the oscillator drive can effectively reduce the overall size of the circuit, and a fast turn-off circuit is designed in a matched mode, so that the turn-off time of the switch is further shortened.