159 results about "Microwave technology" patented technology

The invention relates to the technical field of electromagnetic fields and microwaves, and discloses a broadband high-integration-level dual-circularly polarized antenna which comprises an ultra-wideband self-compensation structure plane radiation surface, an ultra-wideband special-shaped reflection cavity, an ultra-wideband impedance transformer and an ultra-wideband integrated dual-polarized feed network. Wherein the ultra-wide-band self-compensation structure plane radiation surface is arranged at the forward position of the ultra-wide-band special-shaped reflection cavity, and radiation of ultra-wide-band dual circularly polarized waves is executed; the ultra-wide-band special-shaped reflection cavity executes matching and forward reflection of ultra-wide-band backward electromagnetic waves; the ultra-wideband impedance transformer executes radio frequency connection and impedance conversion between the ultra-wideband self-compensation structure plane radiation surface and the ultra-wideband integrated dual-polarization feed network; the ultra-wideband integrated dual-polarization feed network performs conversion from an unbalanced signal to a balanced signal and formation of a dual-circularly polarized signal. Unification of directional diagrams, polarization, axial ratio and standing wave bandwidth of more than 15: 1 frequency multiplication can be realized, and the ultra-wideband dual-circular polarization antenna has the advantages of ultra-wideband, miniaturization, constant wave beam and dual-circular polarization.

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 crossing field of a microwave technology and a sensing technology, and particularly relates to a microwave dielectric parameter measurement sensor based on a micro-flow pipeline embedded in a substrate, and one surface of the substrate is provided with a microstrip transmission line and a resonant structure; the microstrip transmission line is used for exciting and transmitting microwave signals; the resonant structure is used for enhancing electromagnetic field distribution in a certain area of the substrate; a micro-flow pipeline is embedded in the substrate and is used for accurately conveying a substance to be detected to an area where electromagnetic energy is most concentrated; a grounding layer is arranged on one side of the substrate and used for restraining an electromagnetic field, and energy of the electromagnetic field is mainly concentrated in the substrate. The micro-flow pipeline is embedded in a strong electric field area in the substrate, so that a to-be-measured substance directly interacts with an electromagnetic energy concentration area, and dielectric parameter measurement which is compact in structure, high in sensitivity and high in precision is achieved. The sensor provided by the invention has wide application prospects in the fields of biomedical detection, chemical analysis, environmental monitoring, industrial process control and the like.

The invention discloses a small broadband cavity-backed radiator, which belongs to the technical field of electromagnetic fields and microwaves and comprises a reflection cavity, a loading medium, a printed balun, a printed oscillator, a low-density medium support and double leads. The low-density medium support is used for supporting the printed oscillator; the printed balun and the printed oscillator are electrically connected through double leads; the loading medium is used for adjusting the impedance frequency characteristic of the printed oscillator in the reflection cavity; the printed Balun adopts a strip line-flat plate line-parallel double-line structure and is used for realizing unbalanced-balanced transmission mode conversion and impedance conversion of 3: 1 bandwidth; and the printed oscillator is used for radiating electromagnetic energy and is matched with the multi-ring-groove loading medium and the printed Balun to realize impedance-frequency characteristic balance within a 3: 1 bandwidth range. The small broadband back cavity radiator can effectively solve the problems that in the prior art, the caliber of a reflection cavity of a traditional broadband back cavity radiator is large, the loading effect is not ideal when the bandwidth of a directional diagram is 4 GHz or above, and directional diagram distortion occurs.

The application provides a high-isolation dual-polarized phased array TR assembly based on front and back layouts, and relates to the technical fields of microwave and phased array radar. The assembly comprises a multilayer printed board structure cavity, a first surface of the multilayer printed board structure cavity is provided with a radio frequency link of a first polarization channel, and a second surface is mirror-imaged with a radio frequency link of a second polarization channel; the first surface is opposite to the second surface; the first polarization channel and the second polarization channel are orthogonal polarization channels. The application fundamentally solves the polarization crosstalk problem caused by the traditional side-by-side layout, can improve the dual-polarization isolation to more than 80 dB, optimizes the space utilization and the heat dissipation path, and is particularly suitable for high-density and high-performance dual-polarized phased array antenna systems.

The invention discloses a P-band high-power filtering and amplitude limiting assembly, which belongs to the technical field of microwaves and comprises a filter, an amplitude limiter, a polarizer, a coupler and a metal cavity. The amplitude limiter is installed on the bottom layer of the metal cavity, the filter and the polarizer are installed on the top layer of the metal cavity, the coupler is installed on the side wall of the metal cavity, the filter, the low-pass filter and the polarizer are connected in a wall-penetrating welding mode through a 50-ohm metal connecting rod, and the polarizer is fixed to the metal cavity through a medium supporting column. The whole assembly belongs to an upper-lower layer structure. According to the assembly, the transmission path between devices is shortened, the emission loss of the assembly is reduced, the size of the filtering and amplitude limiting assembly is greatly reduced under the condition that composite multiple functions are met, and the purposes of high power and high integration are achieved.

The invention relates to the field of microwave technology and electronic devices, and particularly discloses a surface-mounted microstrip circulator with a shielding cavity, which comprises a shielding body provided with six caulking grooves uniformly distributed at intervals along the circumferential direction, the shielding cavity is formed on the shielding body, and a partition plate is arranged in the shielding cavity to divide the shielding cavity into an upper cavity and a lower cavity which are relatively isolated; the gyromagnetic ferrite is arranged in the lower cavity, the gyromagnetic ferrite is fixedly connected to the partition plate, and the corners of the gyromagnetic ferrite are correspondingly embedded into the caulking grooves; the microstrip circuit is arranged below the gyromagnetic ferrite, and the microstrip circuit is provided with three ports; three conductive connecting bodies, wherein each conductive connecting body is correspondingly and electrically connected with each port; the permanent magnet is arranged in the upper cavity and is used for providing a bias magnetic field for the gyromagnetic ferrite; and the cover plate is connected to the shielding body so as to package the permanent magnet in the upper cavity. Therefore, electromagnetic field distribution can be optimized, high-order mode and spurious resonance can be effectively suppressed, and good rigidity and heat dissipation capability can be achieved.

This invention discloses a simple, multifunctional, integrated 5G analog fronthaul in-band full-duplex communication method for remote units (RUs). This method primarily relates to the fields of optical communication technology and microwave technology. The system structure of the method, as shown in Figure 1 of the specification, includes a laser, downlink vector signal, electrical local oscillator signal, downlink interference signal, target signal, reference signal, 90° electrical coupler, dual-polarization quadrature phase-shift keying modulator, phase modulator, single-mode fiber, optical coupler, polarization beamsplitter, polarization beam combiner, polarization controller, polarizer, and photodetector. The remote unit (RU) uses a single phase (PM) modulator to achieve self-interference cancellation (SIC) combined with anti-fiber dispersion transmission and down-conversion, eliminating the need for bias control and additional local oscillator (LO) branches, resulting in a simple structure. At the central office (CO), the carried downlink signal and local oscillator signal are single-sideband modulated to achieve anti-fiber dispersion transmission. The RU uses wavelength reuse technology to perform PM cascaded down-conversion on the signal received from the uplink, and the SIC is moved from the RU to the CO to simplify the RU. The entire link has no optical filter and is reconfigurable.

The invention discloses a method for constructing a high-conductivity / heat-conductivity carbon material based on microwave induction, and belongs to the technical field of nano carbon material synthesis. According to the method, methane and auxiliary gas are introduced into a variable-frequency microwave vapor deposition system, and the microwave frequency is dynamically regulated and controlled within the range of 2.43-7.5 GHz, so that the methane cracking rate, plasma energy distribution and deposition kinetics are regulated; controllable deposition of multi-scale and multi-morphology composite carbon structures (carbon nanotubes, graphene-like and amorphous carbon) on the surface of a single substrate under the constant temperature condition is achieved, and therefore the microstructure and the electromagnetic response performance are optimized. According to the method, the frequency conversion microwave technology is introduced into a methane cracking deposition system for the first time, atomic-scale controllable deposition of the carbon material is achieved, complex temperature gradient control is avoided, and the obtained carbon-based material has high electric conductivity / heat conductivity, wide-frequency-band shielding effectiveness and excellent structural stability.

This invention relates to the field of electromagnetic fields and microwave technology, aiming to solve the problems of traditional orthogonal short-circuit dual-wire baluns, which suffer from strong jumper inductance effects, large dual-wire radiation, and severe pattern distortion above 5GHz. The planar orthogonal differential feed network also suffers from high network losses and manufacturing costs, making it unsuitable for widespread use in electronic devices above 5GHz. The invention provides a dual-polarized back-cavity radiator, including a reflective cavity enclosure component forming an inner reflective cavity and a ring reflective cavity. An orthogonal printed composite oscillator is disposed within the inner reflective cavity, comprising horizontal and vertical printed composite oscillators, with oscillator plates connected to both sides of each oscillator. Each printed composite oscillator integrates a dual-wire balun, impedance compensation lines, and open-circuit compensation sections. Each printed composite oscillator includes a printed oscillator with front, back, and mezzanine circuits. The impedance compensation lines and open-circuit compensation sections are embedded within the printed oscillator and connected to the mezzanine circuits. The dual-wire balun includes parallel dual wires connected to the front and back circuits.

According to the TE20 mode LTCC patch antenna and radar based on the SIW structure, the SIW structure is applied to a reverse phase balance feed network and a slot coupling patch antenna, is applied to a high-gain TE20 mode LTCC patch antenna array with the frequency band of 77-81GHz and is packaged in an integrated antenna, and the TE20 mode LTCC patch antenna and radar based on the SIW structure have the performance of high gain and wide frequency band; the SIW structure and the LTCC multilayer structure are combined to realize a high-performance, miniaturized and highly integrated high-frequency microwave device, which is an important innovation in the technical field of radio frequency and microwave. The LTCC technology adopted by the invention can realize stacking of multiple layers of ceramic substrates, and provides a basis for manufacturing a multilayer SIW device; the SIW structure realizes a complex waveguide structure on the LTCC substrate, the performance and efficiency of the device are improved, and the formed array antenna has unique advantages in the development of millimeter wave packaging antennas.

The application provides a burst high-repetition-frequency tunable pulse cluster laser generating device, and belongs to the technical field of high-power microwave. The device comprises a pulse cluster laser seed module, an active optical fiber ring module, a multi-stage optical power amplification module and a multi-channel signal generation module. The technical scheme of the application realizes burst replication of the pulse cluster through the active optical fiber ring module, and outputs high-repetition-frequency tunable burst pulse cluster laser in combination with a pre-compensation technology. The output laser pulse is multi-parameter adjustable, the thermal accumulation effect of the high-repetition-frequency laser is reduced, and the continuous output problem of the instantaneous high-power laser in different application occasions is solved.

The application discloses a waveguide type filtering and limiting integrated HPM electromagnetic pulse protection device and belongs to the microwave technical field.The device comprises a rectangular waveguide shell, N pairs of inductive diaphragms arranged in the internal cavity of the rectangular waveguide shell, N-1 pairs of capacitive diaphragms, and a bias magnetic field generating assembly arranged outside; and YIG ferrite sheets are embedded in two pairs of the capacitive diaphragms. The inductive diaphragms and the capacitive diaphragms are arranged in the rectangular waveguide, and the YIG ferrite material is loaded in the capacitive diaphragms, so that the wide band frequency domain filtering protection is realized. Meanwhile, the transient nonlinear loss effect generated by the non-uniform precession of the magnetic moment of the YIG ferrite sheet is utilized, so that the high limiting isolation degree protection of the HPM electromagnetic pulse in the working bandwidth is realized. The application realizes the HPM electromagnetic environment protection function compatible with the frequency domain and the power domain in one microwave device, greatly reduces the volume of the whole microwave front end protection device, effectively reduces the loss in the system working passband, and meets the compactness requirement of the microwave receiver in the HPM electromagnetic environment.

This invention relates to a method for synthesizing multicolored luminescent polymer films using a microwave approach. The method first involves dissolving acrylamide, ammonium persulfate, and α-thiophenecarboxylic acid trifluoroacetone in a solvent, then refluxing the mixture under microwave power. After cooling to room temperature, polymer A is precipitated with methanol. Polymer A is then dissolved in deionized water, europium nitrate solution is added, the pH is adjusted to neutral, the mixture is shaken, and after standing, polymer B is precipitated with methanol. Finally, polymer B is dissolved in deionized water to obtain a colloidal solution. The colloidal solution is dropped into a silicone mold and dried to obtain the multicolored luminescent polymer film. This invention provides a simple, convenient, and rapid preparation method that does not require inert gas protection and can complete polymerization within minutes, showing broad application prospects.

The invention belongs to the technical field of antennas and microwaves, and discloses an electromagnetic compatibility simulation method for an electrically large carrier platform array antenna and a medium. According to the method, the FEM-UTD hybrid algorithm is adopted, the far-field directional diagram of the complex-structure antenna is calculated and extracted by using the FEM method, the array antenna equivalent radiation model is accurately established according to the actual position, arrangement, phase and the like of the array antenna by using the extracted far-field directional diagram according to the far-field equivalence principle, and the array antenna equivalent radiation model is used as an array antenna excitation source. And electromagnetic compatibility simulation of the electrically large-size carrier platform array antenna is realized by using a UTD algorithm. On the premise that the precision is guaranteed, the hardware limitation of a full-wave algorithm on the electrically large size problem is broken through, meanwhile, the defects of a pure UTD algorithm on antenna modeling are overcome, and the balance of electromagnetic compatibility simulation among precision, efficiency and cost is achieved.

The application relates to a coaxial relativistic magnetron outputting TEM modes, belonging to the technical field of high-power microwaves, which comprises an anode, a cathode and a magnet, the anode comprises an inner cavity cylinder and an outer cavity cylinder which are coaxially nested, long anode blocks and short anode blocks are alternately arranged on the inner wall of the inner cavity cylinder in the angular direction, the long anode blocks and the short anode blocks are alternately distributed in the axial direction of the inner cavity cylinder to form symmetrical sector edge cavities inside the inner cavity cylinder, an edge cavity angular coupling slot is arranged on the inner cavity cylinder and corresponds to the sector edge cavities, and an inner cavity axial coupling slot is arranged on the inner cavity cylinder and located between the long anode blocks and the short anode blocks, the application has the advantages of simple and compact structure, suitable permanent magnet packaging and low-order mode output, and can realize high-power and high-efficiency microwave output.

The application provides a microwave signal phase noise measurement system applied to the microwave technical field, comprising: a laser for generating a continuous optical carrier; a phase modulator for modulating a to-be-measured microwave signal onto the optical carrier to obtain a first modulation signal; a polarization beam splitter for inputting the first modulation signal into a polarization state beam splitting delay optical fiber link for modulation to obtain a modulated first modulation signal, the modulation comprising delay and control of phase quadrature; a phase modulator for loading a microwave signal onto the modulated first modulation signal to obtain a second modulation signal; an adjustable optical filter for obtaining a to-be-processed optical signal with only positive first-order sideband information; a photoelectric detector for converting the to-be-processed optical signal into an electrical signal; and a signal processing module for performing data processing on the electrical signal to obtain the phase noise of the to-be-measured microwave signal. The application further discloses a microwave signal phase noise measurement method, which avoids the bandwidth limitation caused by electrical devices.

The invention relates to the technical field of radio frequency and microwave, and discloses an ultra-wideband 3dB quadrature bridge which comprises five layers of printed board circuits. The five-layer printed board circuit comprises a first ground layer, a first signal layer, a second ground layer, a second signal layer and a third ground layer which are connected in sequence; the first stratum, the second stratum and the third stratum are electrically connected through the through holes, and a radio frequency ground loop is provided; the circuit layout of the first signal layer and the second signal layer is in mirror symmetry, orthogonal power division of input signals is achieved through suspension microstrip line coupling, and isolation setting of isolation ends is achieved in combination with a reverse electric field of the suspension microstrip line at an interface. According to the invention, the targets of low standing wave, low loss and miniaturization of the 3dB quadrature bridge in octave bandwidth can be realized.

The invention discloses a passive device synthesis method and system based on frequency response performance segmentation and reconstruction, and belongs to the crossing field of microwave technology and artificial intelligence, and the method comprises the following steps: obtaining component parameters of various passive device topological structures for electromagnetic simulation; inputting the component parameters into a corresponding pre-trained passive device frequency response sub-neural network to obtain predicted S parameters of each passive device topological structure, splicing the predicted S parameters and then inputting the spliced predicted S parameters into a pre-trained passive device frequency response reconstruction neural network to obtain predicted S parameters of a cascade structure; and performing global optimization on the prediction S parameter of the cascade structure to obtain an optimal component parameter combination corresponding to the optimal prediction S parameter. The method can solve the problem that in the prior art, structural parameter analysis is only carried out on a single fixed passive device topology, and structural parameter optimization of various passive device topologies cannot be supported.

The invention belongs to the technical field of microwaves, and particularly relates to a slot line-half-mode SIW composite transmission line for microwave / millimeter wave transmission, which is characterized in that a half-mode SIW structure is arranged in a sandwich structure, and a first metal layer synchronously loads a conical microstrip feeder line and a horn-shaped microstrip feeder line structure; the second metal layer is used as a metal structure with a floor function, and the design mode of additionally loading a slot line and an interdigital capacitor enables the device to realize transmission of an S wave band and a Ka wave band at the same time. Wherein in the S wave band, the horn-shaped micro-strip structure of the first metal layer is used for carrying out coupled feeding on the slot line, and in the Ka wave band, the conical micro-strip structure of the first metal layer is used for directly feeding the half-mode SIW; meanwhile, the second metal layer loads an interdigital capacitor at the tail end of the half-mode SIW to complete filtering, and finally the composite transmission line feed structure supporting synchronous transmission of the half-mode SIW and the slot line is constructed. The machining process is simplified, and the machining cost is reduced.

This utility model discloses a combined baijiu (Chinese liquor) wastewater treatment system based on microwave technology, relating to the field of baijiu wastewater treatment. The system includes an adjustment device and a microwave decomposition device. The adjustment device includes an adjustment box and a drive mechanism. The rotating shaft of the drive mechanism extends into the adjustment box. An expansion member and a first stirring plate are provided on the rotating shaft. A first connecting member is provided on the expansion member. The first stirring plate has several first air holes and a second connecting member communicating with the first air holes. The first stirring plate can move axially along the rotating shaft to connect the first connecting member and the second connecting member. The microwave decomposition device includes a decomposition box and a microwave source disposed on the decomposition box. The adjustment box and the decomposition box are connected by a conduit. The first stirring plate and air bladder ensure thorough mixing of wastewater and hydrogen peroxide, improving the removal efficiency of molecular organic matter in the subsequent wastewater treatment.

The invention provides a heterogeneous integrated chip for generating a tunable microwave source, and relates to the technical field of optical communication and the technical field of microwaves. The heterogeneous integrated chip comprises an electric chip layer, a silicon switching layer and an optical chip layer which are stacked, the electric chip layer is used for outputting microwave signals; the optical chip layer comprises a micro-ring resonator, the optical chip layer is used for receiving input laser and providing microwave signals for the electric chip layer, and the micro-ring resonator is used for adjusting the frequency of the output microwave signals; and the silicon switching layer is used for integrating the electric chip layer and the optical chip layer. High-quality microwave signals can be output through oscillation of the loop, the difference value between a carrier wave and the resonant wavelength can be tuned by tuning the resonant wavelength of the micro-ring, and finally, the generated microwave signals have large-range tunability in frequency, the tuning range is large, and phase noise is small; the integration level is high and the volume power consumption is small.

The invention relates to a coaxial relativistic magnetron for outputting a TEM mode, and belongs to the technical field of high-power microwaves, the coaxial relativistic magnetron comprises an anode, a cathode and a magnet, the anode comprises an inner cavity cylinder and an outer cavity cylinder which are coaxially nested, and long anode blocks and short anode blocks are alternately arranged on the inner wall of the inner cavity cylinder in the angular direction; the long anode blocks and the short anode blocks are alternately distributed in the axial direction of the inner cavity cylinder in a long-short mode so that symmetrical fan-shaped side cavities can be formed in the inner cavity cylinder, side cavity angular coupling seams are formed in the positions, corresponding to the fan-shaped side cavities, of the inner cavity cylinder, and inner cavity axial coupling seams are formed in the positions, located between the long anode blocks and the short anode blocks, of the inner cavity cylinder. The invention has the advantages of simple and compact structure, suitability for permanent magnet packaging and low-order mode output and the like, and can realize high-power and high-efficiency microwave output.

The application discloses a kind of ferrite gyromagnetic nonlinear loss transient response theoretical model and parameter simulation method under vertical pumping configuration, belong to microwave technical field, including the following steps: obtaining ferrite material parameters and target excitation microwave signal parameters, signal parameter at least includes microwave signal frequency, pulse width tau;Pulse width dependent function for representing consistent precession magnetic moment and the coupling strength of non-consistent precession magnetic moment (spin wave) is constructed.In view of this, the application first establishes the quantitative relationship model between the excitation microwave pulse width tau and the nonlinear loss excitation threshold (tau) in the theoretical framework of vertical pumping configuration, establishes the quantitative relationship model between the excitation microwave pulse width tau and the nonlinear loss excitation threshold (tau).The model can accurately describe the nonlinear effect of ferrite under nanosecond transient pulse excitation, and the dynamic law of the excitation condition and the change of pulse width.For the design of ferrite limiter device facing high-power microwave electromagnetic environment, important theory and design basis are provided.

The application discloses a backfire antenna with broadband and beam equalization characteristics, and belongs to the fields of antennas, microwave technology and Internet of Things. The antenna is composed of an elliptical main reflector, a sector dipole and an elliptical sub-reflector. A pair of rectangular slots are opened on the surface of the sector dipole, and a pair of tuning branches are added to disturb the excited modes together, so that the broadband characteristics are realized. The reflector is used to realize good beam equalization characteristics. The performances of the antenna are controlled by the major and minor axis radii of the reflector, the length and width of the rectangular slots, the size of the branches, the central angle of the sector dipole and the size of the radius of the sector dipole. The application has the characteristics of small volume, simple structure and low manufacturing cost, and has wide application prospects in various wireless sensing and various radio frequency identification systems of the Internet of Things.

The invention belongs to the technical field of microwaves, and particularly relates to a DC-100GHz ultra-wideband vertical interconnection structure. Comprising a first substrate, a second substrate, a first metal cavity, a second metal cavity and a radio frequency insulator, the first substrate is placed on the lower surface of the first metal cavity, and the second substrate is arranged on the upper surface of the second metal cavity; the first substrate and the second substrate are respectively provided with an annular metal through hole array, and the upper surface of each annular metal through hole array is covered with a streamline matching ground metal layer. Transmission microstrip lines and impedance conversion microstrip lines are arranged on the upper surface of the first substrate and the upper surface of the second substrate; the transmission microstrip line is connected with the impedance conversion microstrip line; the radio frequency insulator is arranged between the first substrate and the second substrate and passes through the metal layer of the metal cavity to be respectively connected with the impedance conversion microstrip lines on the two substrates; the whole vertical interconnection structure is of a vertically symmetrical structure; the structure provided by the invention is better in working bandwidth effect and smaller in size, and has a good application prospect.

A pest control device comprises a power supply configured to produce 250 to 1500 W, a microwave generator, a microwave emitter probe having a substantially cylindrical shape with a microwave emitter probe length of 5 to 50 cm and a microwave emitter probe diameter of 0.25 to 5 cm, a temperature monitor probe having a substantially cylindrical shape with a temperature monitor probe length of 1 to 25 cm and a temperature monitor probe diameter of 0.5 to 5 cm, and a controller configured to control a power of microwaves emitted by the microwave emitter probe. The pest control device operates at frequencies of 2.0 to 4.0 GHz and provides targeted pest elimination in woody plants through insertable probes that deliver controlled microwave energy directly to infestation sites while maintaining tree health through real-time temperature monitoring and automatic safety controls.

The application belongs to the field of electromagnetic field and microwave technology, and discloses a circularly polarized filtering transmission array antenna adopting linear polarization feed, which comprises a feed antenna for radiating linearly polarized electromagnetic waves; a transmission array adopting an antenna-filter-antenna technology frequency selective surface (AFAFSS) unit; and a periodic unit of the antenna-filter-antenna frequency selective surface (AFAFSS) sequentially comprises a rectangular filtering patch antenna as a linear polarization receiving antenna, two cascaded substrate integrated waveguide (SIW) resonant cavities as filters and a wideband circularly polarized antenna as a circular polarization transmitting antenna from a bottom end to a top end in a hierarchical metal structure. The antenna integrates the functions of filters, linear polarization-circular polarization wave conversion and high-gain radiators, and through rotating the transmitting antennas of hundreds of AFAFSS units, appropriate phase compensation can be realized to form a high-gain CP radiation beam, and meanwhile, the AFAFSS has the functions of filtering and linear polarization-circular polarization wave conversion.

The invention relates to a design, processing and manufacturing method of a novel silicon-based terahertz frequency selection surface, and belongs to the technical field of electromagnetic fields and microwaves. The specific processing and manufacturing steps are as follows: manufacturing a silicon wafer; manufacturing a base; manufacturing a pressing ring; manufacturing a gasket; the gasket, the silicon wafer and the pressing ring are installed on the base, and manufacturing of the silicon-based terahertz frequency selection surface is completed; the silicon wafer is formed by stacking an upper silicon-based bonding structure, a middle silicon-based bonding structure and a lower silicon-based bonding structure; the thicknesses of the layers are the same; wherein the upper surface and the lower surface of the silicon wafer are respectively etched with periodic array patterns and then are subjected to gold plating treatment; the gap between the vertical side wall of the base and the silicon wafer is adjusted through the gasket; a chamfer is arranged on the side wall of the inner ring of the pressing ring; a supporting rib plate is arranged on the side wall of the base; the structure has the advantages of being high in structural strength, compact, good in universality, high in installation precision and the like, and can resist mechanical conditions in the rocket launching stage while meeting the requirement for filtering electrical performance.