45results about How to "Easy production and debugging" patented technology

The invention relates to an absolutely multi-turn magnetism coder. The metal coding disc is distortion round disk shape. And four arcs are set on the radial direction, two opposite side of the same radius has tow arcs, and the third arc is between the next one side, and the fourth arc is set on another side. The coder is simple structure, few components, long useful life, high reliability, etc.

This invention relates to a digital phase-sensitive detector for intelligent element parameter tester. Wherein, connecting inputs and outputs of anti-confusion filter to the target element voltage and current signals and signal inputs of two-way sample / holder respectively; connecting the trigger input ports and outputs of sample / holder to the outputs of the time-base generator and signal input ports of high-speed ADC respectively; connecting the output signal of the ADC to the opposite signal data ports of digital phase-sensitive detection algorithm module in series or by parallel; connecting the control port and data wire of FPGA to the opposite orts of ADC; and connecting the output of algorithm module with the main controller in the tester.

The invention relates to a leakage monitoring chip for a leakage protector. The leakage monitoring chip comprises a power voltage regulator circuit, a reference voltage generator and a latching output circuit, wherein the power voltage regulator circuit is used for providing working voltage for the reference voltage generator and the latching output circuit; the leakage monitoring chip further comprises a circuit structure and a first amplifying circuit and a second amplifying circuit which have the same performance; an input end of a first differential amplifier circuit is electrically connected with an input end of a second differential amplifier circuit, and the end is used as the public input end to connect with an external circuit; the other input end of the first differential amplifier circuit is connected with the external circuit; the other input end of the second differential amplifier circuit is connected with the external circuit; the output end of the first amplifying circuit and the output end of the second amplifying circuit are electrically connected with the input end of the latching output circuit respectively; the reference voltage generator circuit is used for respectively providing reference voltage for the input ends of the first differential amplifier circuit and the second differential amplifier circuit. The leakage monitoring chip provided by the invention has the advantages that the leakage faults of the main loop and the ground wire can be monitored synchronously; and the two fault action current can be adjusted randomly in the scope of national safety standards; the leakage monitoring chip works stably and reliably and the personal safety can be more effectively protected.

The invention relates to an insulation resistance detection and ground protection device of a DC electric system. The insulation resistance detection and ground protection device comprises a detection signal source module, a plurality of signal couplers, a booster transformer, a plurality of residual current sensors, a plurality of phase-sensitive rectifiers, a plurality of insulation resistance detectors, a plurality of protection output units and blocking capacitors, wherein the detection signal source module is connected to the signal couplers through detection signal buses; the detection signal source module is connected to the positive and negative main buses of the DC electric system through the booster transformer; the residual current sensors are connected to the input ends of the phase-sensitive rectifiers, the control ends of the phase-sensitive rectifiers are connected to the detection signal buses, the phase-sensitive rectifiers are connected to the insulation resistance detectors and the protection output units, and the insulation resistance detectors and the protection output units are respectively connected to the detection signal buses. The insulation resistance detection and ground protection device has reliable selectivity and accuracy for insulation reduction and ground faults in a protection domain.

The invention discloses an oscilloscope simulation front end impedance conversion circuit having a program control correction function. A program control current source to a negative power supply at a high frequency crystal triode emitter electrode; under the condition that DC gain is unchanged, the current of the current source is regulated through the program control so as to regulate emitter current of a high frequency crystal triode of the output stage in a impedance conversion circuit, so that the AC gain of the impedance conversion circuit is consistent with the DC gain. Before the product leaves the factory, the current of the program control current source is regulated, which enables the AC gain of the impedance conversion circuit is identical to the DC gain. Artificial manual regulation of a biasing resistor is not needed, and dismantling the machine is not necessary, which is easy to debug. Besides, when an input static resistor of the back stage program control grain variable circuit is changed, dynamic adjustment can be performed, which overcomes the problem that the prior art is not suitable for the occasion of the dynamic change of the backward stage load RL.

The patent for invention discloses a special-shaped cavity tri-mode resonant structure and a filter containing the same. The special-shaped cavity tri-mode resonant structure comprises a cavity and acover plate. A medium resonant block and a medium support frame are arranged in the cavity; at least one end surface of the cavity is concave or convex, and at least one end surface of the medium resonant block is convex or concave; the medium resonant block and the medium support frame form a tri-mode medium resonant rod; one end or any end of a similar cubic medium resonant block is respectivelyconnected with the medium support frame; the medium support frame is connected with the inner wall of the cavity; and the medium resonant block forms tri-mode resonance in three directions of an X axis, a Y axis and a Z axis of the cavity. The cavity filter in the invention is used so that a high Q value is ensured to be obtained under a small distance between the resonant rod and the cavity; meanwhile, the tuning range of a tuning screw rod is enlarged, the sensitiveness of the small distance between the cavity and the medium resonant block to the resonant frequency is reduced, production and debugging are facilitated, and the production cost is reduced.

The invention discloses a duplexer, a dielectric filter and a capacitive coupling structure thereof. The capacitive coupling structure comprises a first adjustment slot which is arranged between two adjacent dielectric resonators in a dielectric body and arranged according to first preset length and preset depth. One end of the first adjustment slot is spaced apart from a sidewall of the dielectric body, and the other end of the first adjustment slot is in communication with another sidewall of the dielectric body or the other end of the first adjustment slot is in communication with an isolation window. The capacitive coupling structure is easy to produce and is convenient for subsequent production debugging. The dielectric filter adopting the capacitive coupling structure has low production difficulty and low difficulty in production debugging. The duplexer adopting the dielectric filter has low production difficulty and low difficulty in production debugging.

The invention relates to an input-matching standing-wave ratio adjusting circuit for a low-noise amplifier and provides a circuit allowing the standing-wave ratio of the low-noise amplifier to be effectively adjusted. The input-matching standing-wave ratio adjusting circuit comprises two variable capacitance diodes; anodes of the variable capacitance diodes are grounded, and cathodes of the variable capacitance diode are connected with ground pins of the low-noise amplifier; reverse bias voltage is input to the reverse ends of the variable capacitance diodes; junction capacitances of the variable capacitance diodes change with adjustment of the reverse bias voltage; thus, characteristic impedance of the input end of the low-noise amplifier is changed, and the standing-wave ratio is adjusted. The input-matching standing-wave ratio adjusting circuit is applicable to the adjustment of the standing-wave ratio in GSM (global system for mobile communications), CDMA (code division multiple access), GPS (global positioning system) and ISM (industrial scientific medical) bands.

The invention relates to a small-sized high-power sealed direct-current solid-state relay comprising a metal casing, a metal cover plate, a control circuit and a power output circuit, wherein the power output circuit is arranged at a bottom layer of the metal casing, the control circuit is arranged at a top layer of the metal casing, and the metal cover plate is hermetically fixed at the top of the metal casing; and two input terminals are hermetically installed on the back end face of the metal casing, two output terminals are hermetically installed on the front end face of the metal casing, the two input terminals are connected with the input end of the control circuit, the output end of the control circuit is connected with the input end of the power output circuit, and the output end of the power output circuit is connected with the two output terminals. The invention adopts two-layer structure design and has small volume, large load current, long service life, good environmental adaptation performance and high reliability, and the leakage rate is not greater than 1*10-1Pa.cm3 / s.

The invention is a direct-digital pressure transmitter, including the capacity presure sensor; the resonant circuit used to receive the capacity changing value and directly transform it into the oscillation frequent signal; the SCM, the external RAM and the input equipment, used to adjust the measuring range and input the measuring parameters; the display cell. The method as follows: initialization setting, and operation and judgement according to the input key value: if measurement, directly get the pulse frequency and make the interpolation operation to get the pressure value, then display the result, if parameter setting, read in the given pressure value and measure the pulse frequency and calculate the corresponding pressure value and save it to RAM.

The invention discloses an LEU test bench system and a test method and a calibration method thereof. The LEU test bench system is composed of a computer and a test box, the test box is internally provided with an ARM processor, an interface S simulation device, a C interface message read-write device, an impedance switching device and a test interface, the ARM processor is connected to the interface S simulation device, and the interface S simulation device is connected to an LEU; the interface S simulation device is connected with the computer, the LEU is connected with the impedance switching device, and the ARM processor is connected with the impedance switching device; the impedance switching device is connected with the test interface, the test interface is connected with the C interface message read-write device, and the C interface message read-write device is connected with the ARM processor; the test interface is connected with an oscilloscope and an attenuator, the oscilloscope is connected to the computer, and the attenuator is connected to a network analyzer. The advantages of the present invention are that whether the functions and output characteristics of an LEU device meet standards or not can be tested, the functions of reading and writing LEU default messages and testing an LEU single board are realized, and the production and debugging are convenient.

The invention relates to a leakage monitoring chip for a leakage protector. The leakage monitoring chip comprises a power voltage regulator circuit, a reference voltage generator and a latching output circuit, wherein the power voltage regulator circuit is used for providing working voltage for the reference voltage generator and the latching output circuit; the leakage monitoring chip further comprises a circuit structure and a first amplifying circuit and a second amplifying circuit which have the same performance; an input end of a first differential amplifier circuit is electrically connected with an input end of a second differential amplifier circuit, and the end is used as the public input end to connect with an external circuit; the other input end of the first differential amplifier circuit is connected with the external circuit; the other input end of the second differential amplifier circuit is connected with the external circuit; the output end of the first amplifying circuit and the output end of the second amplifying circuit are electrically connected with the input end of the latching output circuit respectively; the reference voltage generator circuit is used for respectively providing reference voltage for the input ends of the first differential amplifier circuit and the second differential amplifier circuit. The leakage monitoring chip provided by the invention has the advantages that the leakage faults of the main loop and the ground wire can be monitored synchronously; and the two fault action current can be adjusted randomly in the scope of national safety standards; the leakage monitoring chip works stably and reliably and the personal safety can be more effectively protected.

The invention provides a drive circuit of an electron device. The drive circuit comprises a voltage conversion and stabilization unit, a waveform generation unit and a driving unit, wherein the inputend of the voltage conversion and stabilization unit is used for receiving an input power supply; the input end of the waveform generation unit is coupled with the output end of the voltage conversionand stabilization unit, and the output end of the waveform generation unit provides signals with the waveform changing periodically; the signal input end of the driving unit is coupled with the output end of the waveform generation unit, the power input end of the driving unit is used for receiving the input power supply, and the output end of the driving unit is used for providing a drive powersupply for the electron device. The drive circuit has the advantages that the work voltage range is wide, and the requirements for the work voltage range from 1.8V to 36V can be met at the same time;there are no extra components on the periphery, the drive circuit is simple and easy to produce and debug, and the cost is saved; meanwhile, the drive circuit has a certain function of resisting powerand ground reversal connection, and when 18V or below power and a ground wire are reversely connected, no damage to the circuit can be caused.

The invention provides a switching mode power supply. In the power supply, two input ends of a bridge rectifier (Z) are connected with an alternating current power supply; the positive input end of the bridge rectifier (Z) is connected with an unidirection silicon controlled rectifier (SCR); a cathode of the unidirection silicon controlled rectifier (SCR) is the positive output end (V+) of a power supply; the negative output end of the bridge rectifier (Z) is the negative output end (V-) of the power supply; a filter capacitor (C) is connected in parallel between the positive output end (V+) and the negative output end (V-) of the power supply; a control electrode of the unidirection silicon controlled rectifier (SCR) is connected with the negative end of a voltage-regulator tube (DW); the positive end of the voltage-regulator tube (DW) is connected with the negative output end (V-) of the power supply; and a current limit resistor (R) is connected between the positive output end of the bridge rectifier (Z) and the negative end of the voltage-regulator tube (DW). The power supply has the advantages of low cost, high efficiency, small volume, convenient production and debugging, wide input voltage range and no high-frequency high-voltage pulse radiation, and is particularly applicable to driving power supply of various semiconductor lamps.

The invention discloses a wireless remote control broadband decoding chip with a drive function and an application circuit thereof. The wireless remote control broadband decoding chip integrates a broadband decoding unit, is low in requirement on frequency tolerance and allows frequency tolerance in a range of (-80%)-(+60%) is permitted, so that the chip is simple and convenient to produce and debug, and the production efficiency, the yield and the stability of the chip are improved; a motor driving unit is integrated, and the quantity of apparatuses of a peripheral circuit is reduced, so that the cost is lowered and the difficulty of production and debugging is lowered; an LDO unit is integrated, so that power ripple supplied to the chip and a radio frequency circuit is reduced, and the remote control distance of a remote control toy can be improved; a temperature protective unit is integrated, so that thermal damage of the chip can be effectively prevented, and the chip has good market promotional prospect.

The invention discloses a gas ratio proportioning valve, a multi-gas ratio proportioning combination valve and a gas proportioning system. The proportioning valve consists of a valve body and a valve disk, wherein the valve body is provided with three cavities of which the centers are coaxially communicated, and the valve disk is provided with flow control channels. The valve disk moves in the cavities of the valve body, and the complete linear relationship of the concentration of mixed gas with the shift of the valve disk is realized. The multi-gas ratio proportioning combination valve consists of a plurality of gas ratio proportioning valves, wherein all main gas inlets are communicated, all mixed gas outlets are communicated, and auxiliary gases enter from the respective auxiliary gas inlets. The gas proportioning system comprises the gas ratio proportioning valve or the multi-gas ratio proportioning combination valve. According to the invention, the simple structures of the valve body and the valve disk are combined, the widths of the outlets of the main and auxiliary control channels in the valve disk are matched with the densities of the gases which need to be proportioned, and high-precise mixed bi- and multi-gas can be obtained through the control of only one button without a gas analyzer. The invention has high practical value and can be broadly used in mixed gas proportioning industry.

The multiplexing compositor / allotter includes the fractional power input / output ports module, the connection load port module, the closed case, the transmission line module and the electrical connection module. The multiple cavities cascaded constitute the closed case. Each cavity is composed of the ambient side plates and one piece of the metal clapboard. The three sections of quarter-wave transmission line constitute one or two transmission lines. The joint point of the first section and the second section through the transmission line is connected to the load port module. Each transmission line module is suspended in the cavity respectively. The electrical connection module at each piece of metal clapboard connects the common ends of the transmission line in each cavity to each other.

The invention discloses an outward-convex cavity multi-mode resonant structure and a filter with the resonant structure. The resonant structure comprises a cavity and a cover plate; a dielectric resonant block and a dielectric supporting frame are arranged in the cavity; at least one end plane of the cavity and / or the dielectric resonant block is convex outwards; the dielectric resonant block andthe dielectric supporting framework form a three-mode dielectric resonant rod; one end or any end of the similar-cubic dielectric resonant block is connected with the dielectric supporting frame separately; the dielectric supporting frame is connected with the inner wall of the cavity; and the dielectric resonant block forms three-mode resonance in three directions of X, Y and Z axis in the cavity. By the adoption of the cavity filter provided by the invention, a high Q value can be obtained while a relatively small distance between the resonant rod and the cavity is ensured, and the tuning range of a tuning screw rod is enlarged; and meanwhile, the sensitivity of the small spacing between the cavity and the dielectric resonant block to the resonance frequency is reduced, the production and debugging are facilitated, and the production cost is lowered.

A control method for internal serial port access of multi-node equipment comprises the following steps: according to a selection instruction of an external serial port, a first CPLD of each node in aplurality of nodes is controlled to select one of serial port paths of a plurality of pieces of serial port equipment connected with the first CPLD; the first CPLD transmits serial port equipment information corresponding to the selected serial port path to an MUX chip in the node; the MUX chip is controlled to select an output path according to a control instruction of the external serial port, and the serial port equipment information is transmitted to a second CPLD in a corresponding management board through a node serial port path corresponding to the output path; a management board controls the second CPLD to select a node serial port path of one of the plurality of nodes according to a switching instruction of the external serial port; and the second CPLD transmits the serial port equipment information corresponding to the selected node serial port path to the external serial port. According to the scheme, access requirements of all equipment serial ports in the whole system canbe met on any management board, the backboard cost is saved, and research, development, debugging and fault positioning are facilitated.

The invention discloses a circuit breaker handle connection mode, which comprises a handle (1) and a lever (2). The handle (1) and the lever (2) are mounted together. The circuit breaker handle connection mode is characterized in that the bottom part of a handle disc part (101) of the handle (1) is provided with a mounting groove (102); the bottom part (201) of the lever (2) is mounted in the mounting groove (102) and can rotate; and when the lever (2) is rotated to a fixed position in the mounting groove (102), the degree of freedom is limited by limiting bosses (103) and the lever is thus mounted in the mounting groove (102). According to the circuit breaker handle connection mode, the lever and the handle adopt a rotating mounting mode, and while the cost of the handle and the cost of the lever are not increased, the handle can be reliably connected with the lever and limited.

The invention discloses an oscilloscope analog front-end impedance transformation circuit with a program-controlled calibration function. A program-controlled current source to a negative power supply is added to the emitter of a high-frequency crystal triode. Under the condition that the DC gain remains unchanged, the current of the program-controlled current source is adjusted through the program control, thereby adjusting the emitter current of the high-frequency transistor of the output stage in the impedance transformation circuit, so that the AC gain of the impedance transformation circuit is equal to the DC gain. Before leaving the factory, the current of the program-controlled current source is adjusted so that the AC gain of the impedance conversion circuit is equal to the DC gain. There is no need to manually adjust the bias resistance, and it is not necessary to disassemble the machine, which is convenient for production and debugging. In addition, when the input static resistance of the post-stage programmable variable gain circuit changes, it can be dynamically adjusted, which overcomes the prior art and is not suitable for the situation where the post-stage load RL changes dynamically.

The invention provides a highly integrated electronic sphygmomanometer circuit, which comprises a pressure sensor, a constant current source / constant voltage source, a programmable gain amplifier, an analog-to-digital converter and a single-chip core, wherein the pressure sensor is used for receiving a human body blood pressure signal; the constant current source / constant voltage source is used for providing a constant current / voltage to the pressure sensor; the programmable gain amplifier is used for receiving a differential input positive and negative pressure signal of the pressure sensor and adjusting to required gain amplification; the analog-to-digital converter is used for performing analog-to-digital conversion on the positive and negative pressure signal after the gain amplification; the single-chip core is used for controlling the entire electronic sphygmomanometer circuit to perform data operation, processing or interruption; and the constant current source / constant voltage source, the programmable gain amplifier, the analog-to-digital converter and the single-chip core are integrated on a chip. The circuit is highly integrated, and a fully differential input analog-to-digital conversion module is built in the chip, so that the number of peripheral separation components can be reduced and the accuracy of a measured signal is improved.

The invention relates to a polarization array omnidirectional antenna of the PHS's base stations and mainly solves the problems of poor signal and small percentage of coverage of the tri-sector polarization diversity omnidirectional antenna in the PHS's base stations. We arrange the three minus or plus 45 degrees dual-polarization platy directional antennas with three 0 degree / 90 degrees dual-polarization platy directional antennas interlacedly on the baseline of a hexagon to form the hexad-sector twelve-array minus or plus 45 degrees and 0 degree / 90 degrees qua-polarization diversity antenna structure and carry out the threeway power synthesis to the directional antenna with same degree. The terminals of the hexad-sector antenna export four cable wires of +45 degree, -45 degrees, 0 degree and 90 degrees and connect with the base station to realize receiving and sending out the signal with different polarization methods. The antenna has an omnidirectional radiation directional diagram in the horizontal plane. Compared with the common level omnidirectional antenna, the gain of every polarization terminal is more than 12.5dB, the isolation between any two terminals is less than -25dB and it improves the coverage of the omnidirectional base stations greatly and increases the covering distance of the base stations.

The invention provides a quick mechanical optical switch with dual voice coil linear motors, thereby solving problems that the existing mechanical optical switch has the slow switching speed or the existing mechanical optical switch has the fast switching speed but the obvious vibration noises and thus can not carry the large-power laser. The switch comprises a housing, a driving circuit, a firstvoice coil linear motor, and a second voice coil linear motor. The first voice coil linear motor and the second voice coil linear motor are arranged in the housing in parallel or a collinear manner; and moves have opposite directions. A first light blocking plate and a second light blocking plate are arranged at the mover end portions of the first voice coil linear motor and the second voice coillinear motor respectively. M first light transmission holes distributed at intervals are formed in the first light blocking plate and M second light transmission holes distributed at intervals are formed in the second light blocking plate. M third light transmission holes and M fourth light transmission holes are formed in the two opposite side walls of the housing. When the optical switch is in an on state, the M first light transmission holes, the M second light transmission holes, the M third light transmission holes and the M fourth light transmission holes correspond to each other one byone in a concentric manner in a laser beam transmission direction. The M is larger than or equal to 2.

The invention discloses a soft face skin and a connection method of a robot head shell and the soft face skin. The connection method comprises the following steps that a plurality of connection pointsare marked on the soft face skin in advance; a driving connection point in the connection points is found out, and a connection base plate is arranged at the marked place of the driving connection point in the soft face skin; a perforated magnet is arranged on the surface of the connection base plate; connection rods are arranged on a plurality of driving units; the soft face skin is applied to the robot head shell, and the connection rods are embedded into holes of the perforated magnet and attached to the connection base plate through the magnetic force. By means of the connection method, the robot head shell is connected with and fixed to the soft face skin, meanwhile, the assembling and disassembling difficulty of the soft face skin is greatly lowered, the soft face skin of the robothead shell can be replaced more easily and conveniently, and the connection method can be widely applied to the field of humanoid robots.

The invention provides a piece of equipment for debugging a single frequency network and a method for debugging a single frequency network. Controls comprise a single chip microcomputer, a demodulator, a port, a power supply, button displays and the like; and the controls are structured by using an equivalence processing method of time domain synchronization or frequency domain transformation so as to control a specified data bit of a transmitted waveform. With the controls and method for debugging the single frequency network provided by the invention, a phase of the specified data bit in a debugged low-frequency signal is observed and compared to judge the synchronization performance of a high-frequency carrier and adjust the carrier; a common oscilloscope with a low price is used for observing and adjusting the phase so as to complete the debugging of the single frequency network, therefore expensive oscilloscopes above 500 MHz do not need to be used; the production debugging, online networking of the equipment are convenient; the method is simple and fast; and the structured controls are portable, low in costs and easy to popularize.

The multiplexing compositor / allotter includes the fractional power input / output ports module, the connection load port module, the closed case, the transmission line module and the electrical connection module. The multiple cavities cascaded constitute the closed case. Each cavity is composed of the ambient side plates and one piece of the metal clapboard. The three sections of quarter-wave transmission line constitute one or two transmission lines. The joint point of the first section and the second section through the transmission line is connected to the load port module. Each transmission line module is suspended in the cavity respectively. The electrical connection module at each piece of metal clapboard connects the common ends of the transmission line in each cavity to each other.

A method for controlling internal serial port access of a multi-node device, comprising the following steps: according to an external serial port selection instruction, controlling the first CPLD of each node in several nodes to select one of the serial port paths of several serial port devices connected to it; A CPLD transmits the serial port device information corresponding to the selected serial port path to the MUX chip in the node; controls the MUX chip to select the output path according to the control command of the external serial port, and transmits the serial port device information through the node serial port path corresponding to the output path to The second CPLD in the corresponding management board; the management board controls the second CPLD to select the node serial port path of one of the nodes according to the switching command of the external serial port; the second CPLD transmits the serial device information corresponding to the selected node serial port path to the external serial port . The solution of the present invention can realize the access requirements for serial ports of all devices in the whole system on any management board, save the cost of the backplane and facilitate research and development, debugging and fault location.

The invention discloses a single-photon counting system for measuring weak luminescence of a dielectric medium, comprising a single-photon photoelectric converting module, an input signal photoelectric separating module, a pulse signal output module, an external triggering signal collecting module, a triggering threshold adjusting module, a field programmable gate array (FPGA) module and a peripheral component interconnect (PCI) interface module. In the system, theFPGA module is adopted, so that the complex control circuit is mounted in one chip, the volume of the device is reduced and the design of the circuit is simplified, thereby being convenient for producing and debugging; and simultaneously, in the system, the PCI interface and PC (personal computer) are adopted to transfer the data so as to satisfy the requirements for measuring the weak luminescence of polymers by means of the excellent communication speed and interference resistance of the PCI interface.

The invention discloses a recessed cavity multi-mode resonant structure and a filter comprising the same. The recessed cavity three-mode resonant structure comprises a cavity and a cover plate, wherein a medium resonant block and a medium supporting rack are arranged in the cavity; at least one end surface of the cavity and / or the medium resonant block is recessed; the medium resonant block and the medium supporting rack form a three-mode medium resonant rod; one end or an optional end of a similar square medium resonant block is separately connected with the medium supporting rack; the mediumsupporting rack is connected with the inner wall of the cavity; the medium resonant block and the m edium supporting rack form three-mode resonance in the X-axis direction, the Y-axis direction and the Z-axis direction of the cavity. By the cavity multi-mode filter, it can be ensured that high Q value can be obtained under a small distance between the resonant rod and the cavity, the tuning rangeof a tuning screw is expanded, meanwhile, the sensitivity of a small distance between the cavity and the medium resonant block to resonant frequency is reduced, production and debugging are facilitated, and the production cost is reduced.