114 results about "Electromagnetic transmission" patented technology

The invention provides a comprehensive shielding signal cable and a manufacturing method thereof.The comprehensive shielding signal cable comprises a cable core and a protective layer wrapping the cable core, and the protective layer sequentially comprises a composite shielding layer and an outer sheath layer from inside to outside; the composite shielding layer comprises an iron-based amorphous nanocrystalline alloy layer, a 3D woven mesh layer and a conductive polymer coating which are sequentially arranged on the outer side of the cable core from inside to outside; through the gradient composite structure of the iron-based amorphous nanocrystalline alloy layer (low-frequency magnetic shielding), the 3D woven mesh layer (medium-frequency electromagnetic shielding) and the conductive polymer coating (high-frequency electric field shielding), the full-band shielding effectiveness is realized for the first time, meanwhile, the return loss is greatly reduced, the electromagnetic transmission performance and reliability of the cable are improved, and the service life of the cable is prolonged. And the structural stability of the cable is improved.

The utility model discloses an electromagnetic double clutch type power mechanism, which comprises a motor and an electromagnetic transmission mechanism, the structure of the electromagnetic transmission mechanism comprises a fixing ring, two electromagnetic coils are arranged on the fixing ring in parallel, an armature is fixedly arranged on the outer side of each of two opposite ends in the axial direction of the fixing ring, and a clutch outer core is axially fixed with the fixing ring. A fast-gear clutch assembly and a slow-gear clutch assembly are arranged in the clutch outer core side by side in a circumferential transmission mode, and an inner shifting structure acting on the fast-gear clutch assembly and the slow-gear clutch assembly is arranged in the clutch outer core. A fast gear and slow gear transmission set in transmission connection with the transmission shaft is arranged in the clutch outer core and used for achieving fast gear and slow gear switching transmission. And the electromagnetic force of the two electromagnetic coils realizes the axial sliding of the clutch outer core, so that the fast-gear clutch assembly and the slow-gear clutch assembly are staggered for separation and reunion.

A rotation sensor system includes a rotatable target object configured to rotate about a rotational axis in a rotation direction; a first millimeter-wave (mm-wave) metamaterial track coupled to the rotatable target object, where the first mm-wave metamaterial track is arranged around the rotational axis, and where the first mm-wave metamaterial track includes a first array of elementary structures having at least one first characteristic that changes around a perimeter of the first mm-wave metamaterial track; at least one transmitter configured to transmit a first electro-magnetic transmit signal towards the first mm-wave metamaterial track, where the first mm-wave metamaterial track converts the first electro-magnetic transmit signal into a first electro-magnetic receive signal; at least one receiver configured to receive the first electro-magnetic receive signal; and at least one processor configured to determine a rotational parameter of the rotatable target object based on the received first electro-magnetic receive signal.

The present invention relates to an external antenna kit. The kit includes a first module including a first electromagnetic shielding zone and a first electromagnetic transmission zone; a second module including a second electromagnetic shielding zone and attached to and communicatively connected with the first module; an external antenna configured separately from and electrically connected to the second module; and an antenna slot configured within the first electromagnetic transmission zone on the first module and having a structural geometry corresponding to that of the external antenna to provide for insertion of the external antenna.

The invention discloses a terahertz wave regulation and control method and system for inhomogeneous medium discrete data and a storage medium. The method comprises the following steps: establishing an electromagnetic model based on a multi-dimensional discrete data set; calculating the propagation trajectory of the terahertz wave in the medium by adopting a non-uniform medium ray tracing method; calculating transmission change characteristics of the terahertz wave according to the propagation trajectory of the terahertz wave in the medium; the transmission change characteristics comprise an attenuation characteristic, a phase shift characteristic and a polarization change characteristic of the terahertz wave in a transmission process; and performing terahertz wave regulation and control according to the attenuation characteristic and / or the phase shift characteristic and / or the polarization change characteristic of the terahertz wave. According to the method, the problem that the current modeling and electromagnetic calculation scheme is difficult to be suitable for electromagnetic transmission process calculation and terahertz wave regulation and control of the high-dimensional complex inhomogeneous medium is solved.

In order to provide a method for sustainably operating an electromagnetic transport system to move at least one mover, a first maximum value of a first trajectory for at least one movement quantity of the mover is determined. Additionally, a second maximum value of a second trajectory for said at least one movement quantity of the mover is determined. The first trajectory is selected as a target trajectory if the first maximum value is equal to or smaller than the second maximum value. The second trajectory is selected as a target trajectory, if the second maximum value is smaller than the first maximum value. The mover is moved in accordance with said target trajectory.

Power-split continuously variable transmission system for stepless transmission of drive power for an agricultural vehicle, with an input element for introducing torque and speed at least two switchable output elements for outputting torque and speed, an electromagnetic gear stage with an inner and a middle rotor and an outer stationary ring element, which are mounted concentrically to each other, a mechanical gear stage connected to the electromagnetic gear stage, wherein the outer ring element of the electromagnetic gear stage has electromagnetic coils to generate an electromagnetic field, and an output element is actuated solely by the electromagnetic gear stage, and a further output element is actuated by the electromagnetic gear stage and the mechanical gear stage, wherein the continuously variable transmission system is designed such that the same rotational speed is present between two output elements at a switching point in order to carry out a switching between them synchronously.

The invention relates to a method for operating a sensor system (2) of an ego-vehicle (1), in which the sensor system (2) emits electromagnetic transmission radiation (4) and sensor data (7) are generated as a received signal (5, 6) by detecting the transmission radiation (4) reflected by environmental objects (9) and / or by the ego-vehicle (1). According to the invention, it is provided that during the movement of the ego-vehicle (1), the mirror objects (12, 13) appearing in the sensor data (7) due to multiple reflections of the transmission radiation (4) from environmental objects (9) and / or the ego-vehicle (1) are used to assign the environmental objects (9) to target objects (10).

The invention relates to the technical field of power supply, and discloses a dual-power supply system, which comprises a main power supply module and a standby power supply module, the main power supply module is connected with the CPS controller and used for converting alternating current output by an internal coil system of the electromagnetic transmission mechanism into stable direct current suitable for working of the CPS controller and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller; and the standby power supply module is respectively connected with the main power supply module and the CPS controller, and is used for converting external alternating current into stable direct current suitable for working of the CPS controller when the main power supply module is powered off, and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller. According to the invention, automatic switching and switching of the standby power supply module can be realized, and the CPS controller can work normally in any working state.

The invention belongs to the field of electromagnetic emission, and discloses an electromagnetic track emission system and method for friction coefficient full-period measurement. The electromagnetic track launching system comprises an electromagnetic track launching device, a pulse power system, a diagnosis system and a control system. According to the electromagnetic track launching system, full-launching-period measurement of the friction coefficient in an extreme electromagnetic environment can be achieved, and the system is used for monitoring the contact state between central tracks in each launching process and predicting the service life of a device; the full-emission period measurement of the local temperature of the guide rail can be realized; and full emission period measurement of contact pressure and contact resistance between the pivot rails is realized. According to the contact state between the guide rails in the launching process, the pretightening force of the guide rails or the size of the armature is adjusted, so that the service life of the guide rails is prolonged. The local temperature of the guide rail and the contact pressure between the pivot rails are monitored by utilizing the intrinsic physical characteristics of the Bragg grating, the reliability is high, the wavelength self-reference characteristic is realized, the absolute measurement can be realized, the temporal-spatial resolution is high, and the structure is compact.

The invention relates, among other things, to a voltage converter (1) with a primary side (11) for applying an input voltage (Ue) and a secondary side (12) on which the voltage converter (1) provides an output voltage (Ua). According to the invention, the voltage converter (1) has a monitoring device (50) with at least one monitoring channel (100) comprising a transformer (130), wherein the transformer (130) connects a secondary unit (120) of the monitoring channel (100) arranged on the secondary side (12) of the voltage converter (1) with a primary unit (110) of the monitoring channel (100) arranged on the primary side (11) of the voltage converter (1) with galvanic isolation and enables electromagnetic transmission of a trigger signal (S) triggered by the secondary unit (120) to the primary unit (110), wherein the secondary unit (120) is configured to trigger the trigger signal (S).when a monitored voltage, which corresponds to or depends on the output voltage (Ua), exceeds a predetermined maximum voltage value on the secondary side (12), and wherein the primary unit (110) is configured to deactivate the voltage converter operation of the voltage converter (1) upon receipt of the trigger signal (S).

The present invention relates to a method for performing a verification test on a radar level gauge system and a radar level gauge system for determining a filling level of a product in a storage tank, wherein the radar level gauge system is arranged to determine the filling level of the product in the storage tank. The method comprises the following steps: transmitting an electromagnetic transmission signal towards the surface of the product in the storage tank; receiving an electromagnetic reflection signal generated by reflection of the transmission signal at the surface of the product; forming a measurement representation based on the transmission signal and the reflection signal, the measurement representation comprising surface echo information indicating the filling level of the product; adding verification test echo information indicating a predefined verification test level to the measurement representation, thereby generating a modified measurement representation; processing the modified measurement representation to determine the verification test level based on the modified measurement representation; and providing a signal indicating the result of the processing.

The invention provides a composite board, an equipment shell and a manufacturing method of the composite board. The composite board comprises a main body area and a functional wave-transparent area, wherein the main body area comprises at least one first fiber composite material layer taking carbon fibers as reinforcing materials; the functional wave-transparent area comprises at least one second fiber composite material layer taking non-carbon fibers as reinforcing materials, and the non-carbon fibers are fiber materials with electromagnetic permeability; the main body area and the functional wave-transparent area are designed in a partitioned mode on the basis of functional requirements of electronic equipment, different fiber materials are laid according to preset partitioned patterns respectively, and the composite board with the continuous appearance is formed through one-time hot press forming technology. According to the composite board provided by the invention, high structural strength and high-end appearance continuity are kept, the wave-transparent requirement of a wireless signal is considered, and the shielding problem of a traditional carbon fiber or metal shell on an antenna signal is avoided, so that the communication performance is improved, and the integrated design of the structure and the function is realized.

The present invention provides a substrate-integrated notched mirror dielectric waveguide transmission structure and array thereof, belonging to the field of microwave engineering technology. The structure comprises a dielectric substrate, a metal ground plane and a metal plane attached to the lower surface of the dielectric substrate. Air holes or air slots are provided along one side of the dielectric substrate. The air holes or air slots divide the dielectric substrate into three parts, namely dielectric blocks on both sides and a dielectric strip in the middle. The metal plane is located on the upper surface of the dielectric block. The metal plane and the metal ground plane are connected to form a common ground. Compared with traditional dielectric waveguides, this dielectric waveguide transmission structure is easier to achieve planar integration. The integrated design makes the dielectric waveguide transmission structure simple, stable and low-loss. It is suitable for the integrated planar circuit board manufacturing process for millimeter wave terahertz and other frequency bands, and is used for electromagnetic transmission in millimeter wave terahertz and other frequency bands.

The invention discloses a direct-connected transmission system for cathode rapping of an electrostatic precipitator, comprising a motor, a reducer, a coupling, a transmission shaft, an insulating box, an electromagnetic transmission shaft, a rapping shaft, a rapping hammer, a transition sleeve and an ash-blocking sealing plate; the output shaft of the motor is connected to the input shaft of the reducer, the output shaft of the reducer is connected to one end of the transmission shaft through a coupling, the other end of the transmission shaft is inserted into the insulating box and connected to one end of the electromagnetic transmission shaft, the other end of the electromagnetic transmission shaft is connected to one end of the rapping shaft, the other end of the rapping shaft passes through the transition sleeve and the ash-blocking sealing plate and is connected to the rapping hammer, the rapping hammer is facing the discharge electrode, the opening at one end of the transition sleeve is closed by the ash-blocking sealing plate, the opening at the other end of the transition sleeve is connected to the insulating box, the system has the characteristics of saving space, simple structure, no ash accumulation and convenient overhaul and maintenance.

Disclosed are photocurable compositions and processes for fabricating 3D high-frequency dielectric materials for use as insulators in circuits, for example, high-performance RF components such as antennas, filters, transmission lines, or high-frequency interconnects for electromagnetic transmission. The high-frequency circuit structures exhibit very low dielectric loss at operating frequencies (1-60 GHz).

The invention discloses an MCU dual-port fixed side differential type signal output control method, and relates to the technical field of output signal control circuits, the MCU dual-port fixed side differential type signal output control method comprises an AC / DC module, a voltage stabilization module, an MCU, an optocoupler relay, a triode driving circuit and an electromagnetic relay, the first output end of the AC / DC module is in signal connection with the voltage stabilization module and the MCU in sequence, and the second output end of the AC / DC module is in signal connection with the optocoupler relay. The MCU is connected with an optocoupler relay through a dual-port signal, the optocoupler relay is in signal connection with the electromagnetic relay through a triode driving circuit, and the electromagnetic relay is connected with a second output end of the AC / DC module. The multi-isolation technology is adopted, and the reliability and safety of the circuit are guaranteed. According to the invention, a fixed side differential signal transmission mode is adopted, and the signal transmission stability is ensured. A signal-light-electricity-electromagnetic transmission mode is adopted, and stable and efficient signal transmission is guaranteed.

The receiver captures an electromagnetic transmission carrying a bauded signal, such as a transmission from an orbiting satellite, and processes it for Doppler shift analysis. The electromagnetic transmission is captured and a non-linear operation is performed to expose a cyclostationary feature of the captured transmission that will define a rate-line. This rate-line will exist at a frequency that is related to the bauded signal and Doppler shift relative to the motion of the transmitter to the receiver. The rate-line frequency is tracked in time to generate data indicative of a Doppler shift associated with the satellite and processed by an estimator fed by satellite propagator to supply positioning, navigation and timing services at the receiver output.

This invention provides a conformal antenna for insect-scale small biomimetic aircraft, relating to the field of biomimetic aircraft technology. In this invention, the body structure of the insect-scale small biomimetic aircraft includes legs, a tail, and wings; several conformal antennas are respectively configured around the legs, tail, and wings, operating in different frequency bands and receiving electromagnetic signal excitation from corresponding feed points. The insect biomimetic antenna is both a structural component of the organism and a communication component for electromagnetic transmission, essentially integrating multiple functions into one structure; multi-functional multiplexing is an effective way to achieve miniaturization and lightweighting of insect biomimetic aircraft. The application of the antenna described in this invention significantly improves the level of multi-frequency high-speed data transmission in biomimetic aircraft, while also endowing them with extremely high stealth capabilities.

The application relates to the field of electromagnetic field transmission and waveguide technology, and discloses a rectangular waveguide based on an electromagnetic Weyl metamaterial and a design method. 2d The structure parameters of the saddle-shaped metal unit with point group symmetry are adjusted to match the Weyl point frequency with a target screening frequency, the saddle-shaped metal units are periodically arranged in a three-dimensional direction to form a rectangular waveguide nesting structure, and the self-driven frequency selection function is realized; the CST full-wave simulation software is used to model the Weyl metamaterial waveguide, a limited period is set along the transmission direction of the Weyl metamaterial waveguide, and an x-y-z full-direction open boundary condition is adopted to simulate the electromagnetic transmission characteristics of the actual waveguide, and the electromagnetic field response of the waveguide basic mode is calculated, so that the self-driven frequency selection function is verified; based on the simulation verification result, the transmission mode of the Weyl metamaterial waveguide is analyzed, it is verified that the Weyl metamaterial waveguide is bounded by the Weyl frequency, and the frequency selection characteristic that the low-frequency signal is spontaneously suppressed and the high-frequency signal is conducted.

The invention discloses a double-pole double-throw radio frequency switch, which comprises a radio frequency module, an electromagnetic transmission assembly and a control module, and is characterized in that the radio frequency module comprises a base body; the base body is fixedly covered with the cover plate, and a first hole groove is formed in the side, away from the base body, of the cover plate; the side, facing the cover plate, of the base body is provided with a first groove, at least part of the reed is located in the first groove, the thickness of the reed is 0.05-0.1 mm, and the reed is provided with a reinforcing rib; the positioning seat is arranged on the side, away from the base body, of the cover plate corresponding to the reed; each positioning seat is correspondingly provided with two positioning rods, and the positioning rods penetrate through the cover plate and are fixedly connected with the positioning seats and the reeds; the two ends of the elastic piece abut against the cover plate and the positioning base respectively, at least part of the elastic piece is located in the first hole groove, the radial size of the elastic piece is matched with that of the first hole groove, and the elastic piece is of a multi-bend S-shaped structure; and the radio frequency connector is connected to one side, far away from the cover plate, of the base body. The double-pole double-throw radio frequency switch is good in reset elasticity and simple in assembly structure, and the transmission frequency is effectively improved.

The invention relates to the technical field of signal transmission, and discloses an inspection well monitoring terminal low power consumption and data reliability guarantee method based on edge calculation, which comprises the following steps: collecting well lid vibration signals through a terminal built-in sensor, and extracting vibration dominant frequency, amplitude and instantaneous phase; constructing a well lid edge gap opening model reflecting the contact state of the well lid and the well seat by using the vibration amplitude, and deducing an effective electromagnetic transmission window proportion in combination with a preset radio frequency signal overflow threshold; calculating the number of retransmission times of the data packets meeting the transmission success probability according to the proportion, and calculating the optimal emission moment offset aiming at the maximum gap opening according to the vibration phase; and finally generating a discrete emission time sequence set and driving a radio frequency unit to send data. According to the invention, a micro gap generated by structural vibration is used as an electromagnetic transmission channel, phase-locked transmission is realized through deterministic calculation of an edge side, and the problem of communication reliability and energy efficiency balance of a low-power-consumption terminal in a strong-shielding and non-stationary channel environment is effectively solved.

The present invention relates to the technical field of magnetic-coupled wireless power transmission, and specifically discloses a full-space magnetic-coupled wireless local power transmission system and a magnetic energy regulation method thereof. The power transmission system includes N ≥ 3 three-dimensional orthogonal solid coils; each three-dimensional orthogonal solid coil includes an X-plane orthogonal coil, a Y-plane orthogonal coil, and a Z-plane orthogonal coil that are respectively distributed on the X, Y, and Z coordinate planes and whose geometric centers coincide with the origin of coordinates; any combination of an X-plane orthogonal coil, a Y-plane orthogonal coil, and a Z-plane orthogonal coil forms a transmitting mechanism for full-space electromagnetic transmission. The magnetic energy regulation method selects the optimal transmitting mechanism according to the position of the receiving coil, the magnitude and direction of the desired magnetic field. After determining the optimal transmitting mechanism, the amplitudes of the three excitation currents are set according to the solutions of the non-linear programming equation, and the phases of the three excitation currents are set to be in the same phase, which can dynamically regulate the spatial distribution of magnetic energy with the position and orientation of the terminal within the effective power transmission range, eliminate the influence brought by the dead zone space, achieve omnidirectional and full-angle power transmission, and minimize magnetic leakage.

The invention belongs to the technical field of drilling while drilling electromagnetic transmission, and provides a short section insulation assembly for a drilling string, which comprises a first short section and a second short section, the first short section and the second short section are rigid pipes, the first short section comprises a first threaded end and a first connecting end, and the second short section comprises a second threaded end and a second connecting end. The first connecting end and the second connecting end are connected with an upper drill column and a lower drill column respectively, the first threaded end and the second threaded end can be connected with each other, the first threaded end is coated with an insulating material, and elastic non-conductive fibers are wound on the insulating material; it is guaranteed that the short section part of the drill column can bear high-strength operation pressure, bending, torsion and other loads, circulation of drilling fluid in the drill column is achieved on the premise that the structural requirement is not changed, the insulation performance of the two ends of the drill column is guaranteed, and electric conduction between the two ends of the drill column is efficiently prevented.

The invention discloses a cable distribution parameter model construction and wave process analysis method, and relates to the technical field of the power industry, and the method comprises the steps: analyzing a cable structure to determine the hierarchy of the cable structure; constructing a distributed parameter model composed of unit length resistance, inductance, conductance and capacitance according to the ratio of the wavelength of the traveling wave to the length of the cable; an equation set is listed based on the Kirchhoff's law, and a transmission line partial differential equation describing the electromagnetic transmission characteristics of the cable is deduced; a refraction and reflection rule of traveling waves in a cable is analyzed, voltage and current refraction and reflection coefficients are deduced to determine traveling wave propagation behaviors, and in addition, time domain traveling wave fault distance measurement, fault distance measurement based on an improved head end reflection coefficient spectrum and insulation defect online monitoring based on active signal injection can be achieved in an extending mode. The method can eliminate the periodic distortion of the traditional frequency domain reflection spectrum, improves the fault distance measurement precision, achieves the real-time monitoring of the insulation state, and guarantees the safe and stable operation of the cable.

The invention discloses a limited-angle energy-saving motor with an automatic speed regulating mechanism, relates to the technical field of energy-saving motors, and aims at the operation process of the limited-angle motor, a multi-element rotor assembly is additionally arranged on the basis of not interfering normal electromagnetic transmission. According to the multi-element rotor assembly, the first driving rotor, the second driving rotor, the second lateral rotor and the first lateral rotor serve as the key, the key limits the structural appearance, the connection mode and the transmission process of the four rotor structures, when a transmission rod rotates normally, the whole multi-element rotor assembly can be driven to conduct the adaptive rotation process, and the transmission efficiency is improved. On the basis, the linear movement process of the straight gear plate is matched, the conversion process of secondary linear movement is additionally arranged, specifically, the electric push rod actively interferes with the rotating speed of the first lateral rotor and the rotating speed of the second lateral rotor, the purpose of automatic rotating speed / steering control is achieved, and therefore the working precision requirement in an application object can be better met.

This invention discloses a power-off compensation mechanism for a two-dimensional electro-hydraulic servo valve directly driven by an ultrasonic motor. The mechanism includes a 2D valve assembly, an ultrasonic motor, an electromagnetic transmission assembly connecting the 2D valve assembly and the ultrasonic motor, and a motor cover. The 2D valve assembly includes an LVDT body, an LVDT sensing core, a left valve end cover, a left plug, a valve body, a valve sleeve, a valve core, a concentric ring, and a right plug. The electromagnetic transmission assembly includes a braking assembly and a motion transmission assembly. The braking assembly includes a right valve end cover, a coil, a retaining ring, and a return spring assembly. The motion transmission assembly includes a first coupling, an armature, and a second coupling. This invention uses a direct-drive ultrasonic motor to move the valve core via the motion transmission assembly. Energizing the braking assembly disconnects the valve core shaft from the motor shaft, solving the problem of the ultrasonic motor jamming due to power failure. This allows for independent and effective control of the valve core even during abnormal braking and when the motor stops rotating.

An apparatus and a method for inspecting a display device are provided. The apparatus includes an electromagnetic transfer unit including a first electromagnetic transfer unit extending in a first direction and a second electromagnetic transfer unit spaced apart from the first electromagnetic transfer unit and extending parallel to the first electromagnetic transfer unit, a stage, and a mechanical transfer unit, the stage is disposed on the electromagnetic transfer unit to support the display substrate, and the mechanical transfer unit is disposed between the first electromagnetic transfer unit and the second electromagnetic transfer unit and extends in a first direction.

The invention discloses a broadband angle insensitive nonlinear electromagnetic transmission modulation surface and a working method. The broadband angle insensitive nonlinear electromagnetic transmission modulation surface comprises a plurality of structural units which are periodically arranged; the structural unit comprises a metal layer and a dielectric substrate, the dielectric substrate is of a square structure, the metal layer is arranged on the dielectric substrate, a sawtooth structure, a square metal ring and a PIN diode are arranged in the metal layer, the square metal ring is arranged along the side length of the dielectric substrate, the sawtooth structure is arranged at one end of the outer side of the square metal ring, and the PIN diode is arranged in the square metal ring. Gaps are arranged between the square metal rings on two adjacent edges of the dielectric substrate, and the PIN diodes are installed in the gaps. By introducing the sawtooth structure, reasonable installation of the PIN diode and miniaturization of the unit size are both considered, adaptive response control over high-power electromagnetic waves and low-power signals can be achieved, transmission of the high-power electromagnetic waves is shielded to prevent the high-power electromagnetic waves from damaging a protected instrument circuit, and normal transmitting and receiving of the signals are guaranteed through transmission of the low-power electromagnetic waves.

The invention belongs to the technical field of electronic functional materials, and particularly relates to a miniaturized active frequency selective surface based on a curling structure. According to the invention, two different types of cross curling structure frequency selection surfaces of a communication type and an interval type are cascaded up and down, so that double wave-transparent frequency bands are generated at low frequency; the frequency selective surface with a centrosymmetric pattern is adopted, and polarization stability is achieved; and a fractal structure FSS is used for loading a PIN diode, so that dual-band electromagnetic on / off active regulation and control can be realized at low frequency. The invention further provides a scheme adopting a Wheatstone bridge feed circuit, and electromagnetic coupling between the feed circuit and the structure is reduced. The first working frequency band is in the P and L wave bands, the second working frequency band is in the S wave band, the working range covers the P wave band to the S wave band, and the antenna has excellent angle stability and has great potential in application in the aspects of electromagnetic transmission regulation and control, low-frequency communication and the like.