43 results about "Antenna polarization" patented technology

The invention discloses a reflective array antenna control method and system based on a broadband dual-polarization unit, and the method comprises the steps: obtaining a target wave beam pointing instruction, and carrying out the orthogonal decomposition of the target wave beam pointing instruction into a first polarization control vector and a second polarization control vector; calculating a theoretical phase frequency spectrum of each unit according to the polarization control vector; calling a preset database to extract a basic phase spectrum; quantitative mapping is carried out by calculating a matching error between a theory and a basic phase frequency spectrum, a phase control code containing the first polarization and the second polarization is obtained and loaded to a corresponding broadband dual-polarization unit to drive the switching of a physical state of the broadband dual-polarization unit, and real-time reconstruction of a wave beam is realized. Compared with the prior art, the antenna can overcome the defects that a traditional reflective array antenna is serious in polarization component coupling, low in phase matching degree in a broadband range and inaccurate in phase control code acquisition, and remarkably enhances the independent pointing precision and the full-band gain stability of dual-polarization beams. Therefore, flexible reconstruction of the wave beam in polarization and frequency dimensions is realized.

The invention belongs to the field of antennas, and particularly relates to a polarization selection electromagnetic protection circularly polarized antenna and a use method thereof. The polarization selection electromagnetic protection circularly polarized antenna comprises an antenna radiation unit which comprises a main radiation body and a plurality of current coupling perturbation structures arranged on the main radiation body; the polarization control and protection unit comprises at least two groups of protection structures and control elements corresponding to the protection structures; the two groups of protection structures are respectively arranged corresponding to two orthogonal polarization directions of the antenna and are selectively connected with the main radiator through the control element; the multi-feed network comprises a plurality of feeds which are connected according to a preset phase difference relation and is used for exciting the antenna radiation unit to generate circularly polarized radiation waves; according to the circularly polarized antenna provided by the invention, the connection state of a protection structure is switched through a passive control element under high-power microwave incidence, and the polarization characteristic of the antenna is dynamically reconstructed, so that polarization selective protection is realized and the communication capability is kept under strong electromagnetic attack.

This application provides an RFID tag, comprising an RFID chip and an antenna body. The antenna body includes an impedance matching network and a radiator, and the RFID chip is connected to the impedance matching network. The impedance matching network is formed by parallel impedance matching units and is connected to the radiator. The radiator has a hollow design. Based on the parallel impedance matching network and the gap between the impedance matching network and the radiator, the polarization direction of the RFID tag is vertical. This application's RFID tag, by changing the antenna structure, achieves a vertical antenna polarization direction, realizing a 90° polarization direction reversal compared to the conventional dipole antenna, thus improving the RFID tag's performance.

The invention provides a performance optimization method of a rectangular horn antenna and the rectangular horn antenna, and the performance optimization method comprises the steps: firstly adding a matching section, designing the matching end of the horn antenna into a multi-step structure, achieving the effect of reducing the side lobe of an E surface, then adjusting the length of a third step to change the phase difference between a TM12 mode and a TM10 mode, and achieving the effect of reducing the side lobe of the E surface. The side lobe is further reduced, and the ridge of the inner circumferential wall of the field angle radiation section is chamfered to suppress cross polarization. On the premise of keeping the inherent advantages of simple structure, convenience in processing, broadband operation and the like to the greatest extent, the radiation characteristics of the antenna are optimized in a collaborative manner fundamentally, and particularly, troubling D-plane cross polarization is effectively inhibited, and the side lobe level is reduced; therefore, the extreme requirements of a next-generation high-performance communication system on antenna polarization purity and directional diagram quality are met.

The application provides an antenna feed control method and circuit, and belongs to the technical field of wireless communication. The method comprises the following steps: receiving a signal strength ratio and a first phase difference between received signals of two feed points of an antenna, wherein the two feed points respectively receive one vertical component of an external signal; determining a power distribution ratio and a second phase difference between transmitted signals of the two feed points according to the signal strength ratio and the first phase difference, wherein the power distribution ratio is the same as the signal strength ratio, and the first phase difference is opposite to the second phase difference; and controlling the transmission power of the two feed points according to the power distribution ratio and the transmission phase of the two feed points according to the second phase difference by using a feed network. The application decomposes the external signal into two vertical components, and dynamically controls the transmission signals of the two antenna units by using the feed network according to the analysis results of the two vertical components, so as to synthesize a signal matched with the external signal, and always keep the antenna polarization loss between the two devices at a minimum.

The application provides a small-size ultra-wideband wall-hanging antenna with high stability, and specifically relates to a single-polarization directional wall-hanging antenna, which is vertically polarized and comprises a first radiating vibrator, a second radiating vibrator, a first coupling sheet, a second coupling sheet, a third coupling sheet, an antenna cover, a cable feeder and a reflecting plate. The first radiating vibrator and the second radiating vibrator form an asymmetric antenna dipole radiator, and the first coupling sheet and the leftmost part of the second radiating vibrator form an asymmetric structure. The second coupling sheet and the third coupling sheet are separately arranged on the left and right sides of the included angle formed by the first radiating vibrator and the second radiating vibrator. The technical scheme improves the feeding mode and feeding process of the existing wall-hanging antenna on the market, greatly reduces the production cost of the antenna, has the characteristics of low intermodulation, ultra-wideband, simple structure, low cost, stable electrical performance and the like, and can be perfectly applied to a mobile communication system with directional coverage requirements.

The application belongs to the technical field of time modulation array, and relates to a direction and polarization joint estimation method based on a time modulation array, which comprises the following steps: establishing an alternating polarization time modulation array, obtaining the received signal of each array element, a time modulation function and the polarization vector of each array element, then obtaining the actual received signal of each array element, and establishing a linear relationship among the harmonic component of each subarray received signal, a polarization parameter and an incident direction; according to the linear relationship, obtaining the relationship between the direction disturbance and the direction function disturbance, rewriting the vector formed by the subarray harmonic component into a form containing a noise term, obtaining the error disturbance between the true value of the direction function and the corresponding estimation quantity, and then obtaining the estimation value of the direction; according to the linear relationship, obtaining the relationship between the polarization matching coefficient of the array manifold vector estimation value and the antenna polarization and the polarization of the radiation source, and then obtaining the estimation value of the polarization. The application can realize joint estimation of the direction and the polarization.

The utility model discloses a radar antenna polarization switching device, which comprises a shell, a waveguide tube rotatably supported on the shell, a dielectric sheet fixedly connected in the waveguide tube, a single-phase asynchronous motor, a coupler, a worm and gear transmission assembly, a gear transmission assembly and a microswitch sensing assembly, the microswitch induction assembly comprises an induction sleeve arranged outside the waveguide tube in a sleeving mode, a first protrusion and a second protrusion are arranged on the periphery of the induction sleeve, the microswitch induction assembly further comprises a first microswitch and a second microswitch, and the first microswitch and the second microswitch are arranged on the shell. When the dielectric sheet in the waveguide tube rotates to a first corner position, the first protrusion triggers the first microswitch to send out a motor stop signal, and when the dielectric sheet in the waveguide tube rotates to a second corner position, the second microswitch is triggered to send out a motor stop signal. The device is low in cost, high in reliability and good in maintainability.

A radio frequency identification (RFID) reader is disclosed. The RFID reader includes at least one antenna configured to transmit a plurality of radio frequency (RF) signals to at least one RFID tag. The RFID reader further comprises at least one processor and at least one non-transitory memory, the at least one non-transitory memory comprising computer program code, the at least one non-transitory memory and the computer program code are configured to, with the at least one processor, cause the RFID reader to: determine a plurality of parameters associated with the RFID reader based on the transmitted plurality of RF signals; determining an effective isotropic radiation power (EIRP) of the RFID reader based on the plurality of parameters; comparing the EIRP with a threshold value; and switching the polarization of the at least one antenna from the first polarization to the second polarization based on the comparison.

The application relates to the technical field of communication, and provides a detection device for the polarization mode of a base station antenna, which comprises a signal generator, a base station antenna radio frequency instrument electrically connected with the signal generator, at least one detection mechanism, the detection mechanism comprising a detection component and at least one radiation probe, the radiation probe being arranged opposite to a base station antenna radiation element along a polarization direction of the base station antenna radiation element, the detection component being electrically connected with the radiation probe and used for representing a detection result, and the working frequency band of the radiation probe being greater than or equal to the working frequency band of the base station antenna radiation element. The detection device for the polarization mode of the base station antenna can quickly judge whether the polarization direction of the base station antenna radiation element is correct, the testing principle is simple, the cost is low, the polarization mode of the antenna can be effectively controlled, the working strength of workers is reduced, and the production efficiency is improved.

According to the present invention there is provided a polarisation converter comprising: a first element array layer extending in a plane comprising a first array of spaced apart electrically conductive dipole elements; a second element array layer extending in a plane comprising a second array of spaced apart electrically conductive dipole elements; a dielectric layer extending in a plane separating the first element array layer and the second element array layer, each element array layer having a first and second axis parallel to the plane of the respective element array layer, the first axis and second axis being perpendicular axes, wherein: one or both of the element array layers exhibits an anisotropic spatial property. An antenna system, vehicle and method of manufacturing a polarisation converter are also provided.

This invention relates to the field of antenna technology, and in particular to an antenna system and electronic device, comprising an antenna element and a radome. The radome is located on the path of the antenna element's transmitted or received linearly polarized wave, and there is a rotational travel between the radome and the antenna element. A metal patch is disposed on the radome, which is used to change the electric field of the antenna element during at least a portion of the rotational travel. By rotating the radome, this invention allows for the switching and adjustment of the signal wave between linearly polarized, elliptically polarized, and circularly polarized waves according to usage requirements, achieving flexible adjustment of the signal processed by the antenna system. Furthermore, the structure is simple. Compared to existing circularly polarized antennas, it not only achieves stepless switching control of antenna polarization but also eliminates complex structures such as feed networks and multiple structural units, simplifying the system structure, reducing manufacturing difficulty and cost, improving the space utilization of the antenna system, and enabling miniaturized antenna system design.

The invention discloses a low-scattering metasurface array antenna polarization conversion method, device and equipment. The method comprises the following steps: designing a metasurface array antenna unit structure; configuring a polarization conversion working mode; integrating a scattering suppression structure and defining a wave absorbing mode; establishing a dynamic impedance matching mechanism; the array arrangement mode is optimized; and executing polarization scattering cooperative regulation and control to realize switching of working modes. The invention has the following advantages and effects: active and dynamic strong scattering suppression can be realized while high-efficiency and broadband polarization conversion performance is maintained, that is, intelligent cooperation and on-demand switching of a polarization conversion function and a low scattering characteristic are realized.

Systems and methods for transmitter distortion mitigation for multiple-antenna systems are disclosed. In one embodiment, a method performed by a network node for a Radio Access Network (RAN) of a cellular communications system comprises obtaining baseline beams for downlink transmission to a User Equipment (UE), wherein the baseline beams comprise a first set of baseline beams for a vertical dimension for at least two antenna polarizations, a plurality of subcarriers, and one or more Multiple Input Multiple Output (MIMO) layers and a second set of baseline beams for a horizontal dimension for the at least two antenna polarizations, the plurality of subcarriers, and the one or more MIMO layers. The method further comprises generating a precoding matrix comprising beamforming weights for downlink transmission to the UE, based on the first and second sets of baseline beams such that a directional perturbation is introduced into the beamforming weights over frequency.

The invention specifically discloses a millimeter wave high-gain polarization reconfigurable magnetoelectric dipole antenna, and relates to the technical field of wireless communication. The antenna comprises a semi-ellipsoid lens, a rectangular patch, an inverted L-shaped feed branch, a pin diode switch, a first metal substrate, a first dielectric substrate, a second metal substrate, a second dielectric substrate, a third dielectric substrate, a grounding coplanar waveguide feed port, a microstrip line and the like. The semi-ellipsoid lens and the rectangular patch are fixed on the upper surface of the first dielectric substrate, one end of the grounding coplanar waveguide feed port is connected with the microstrip line, the other end of the grounding coplanar waveguide feed port is connected with the third dielectric substrate, and the rectangular patch is fed through the inverted L-shaped feed branch; the pin diode switch is arranged on the upper surface of the first dielectric substrate, one end of the pin diode switch is connected with the inverted L-shaped feed branch, and the other end of the pin diode switch is connected with the inverted L-shaped branch line. The antenna provided by the invention is efficient in polarization switching, remarkable in gain effect and low in transmission loss, and effectively solves the related technical bottleneck of the traditional millimeter wave antenna.

The invention discloses a handheld spatial spectrum direction finding receiver and a direction finding method thereof, and belongs to the technical field of radio direction finding. The receiver comprises a receiving antenna array, a balancing device group, an attitude detection control module, a radio frequency receiving link, a baseband processing system and the like. A rotation angle is obtained by manually rotating the receiving antenna array and combining the attitude detection module, the antenna polarization state is maintained by using the balancing device group, and the layout form is reconstructed. The direction finding method comprises the steps of system channel calibration, multi-attitude signal acquisition and covariance matrix calculation, spatial spectrum search based on maximum likelihood estimation, joint spectrum estimation on a covariance matrix sequence obtained after multiple times of rotation by establishing an array manifold model under a geodetic coordinate system, and direction finding. The high-precision direction finding of azimuth angles and pitch angles of single signals and co-frequency multi-signals is realized, the handheld portability and the direction finding performance are considered, and the high-precision direction finding device is suitable for scenes of field operation, emergency communication and the like.

The utility model relates to the technical field of polarization rotating mechanism assemblies, and provides a Ku frequency band miniaturized polarization rotating mechanism assembly, which comprises a shell, a transmitter, a waveguide rotating joint, a receiver and an orthogonal mode coupler, and is characterized in that the transmitter is arranged in the shell; the waveguide rotary joint is rotationally connected with the transmitter; the receiver is arranged on the waveguide rotating joint; the inner end of the orthogonal mode coupler is connected with the receiver, the outer end of the orthogonal mode coupler penetrates through the shell and then extends out of the shell, the orthogonal mode coupler is rotationally connected with the shell, and the waveguide rotating joint, the receiver and the orthogonal mode coupler are coaxially arranged. According to the technical scheme, the problem that the application range of the polarization rotating mechanism assembly is limited due to the fact that the installation space of the polarization rotating mechanism assembly is required to a certain extent when the polarization rotating mechanism assembly debugs the polarization angle of the antenna in the related technology is solved.

The application relates to a design method of a phase interferometer based on multiple linear polarization antennas, and belongs to the technical field of array signal processing. The application solves the problems of polarization mismatch, low robustness and low precision of polarization parameter measurement of an existing polarization interferometer. The design criteria of the linear polarization antenna spacing of the application are the direction finding precision and the phase difference measurement error. The design criteria of the polarization pointing angle of the linear polarization antenna are the super volume of the polarization parameter matrix of the receiving linear polarization antenna. Since the polarization pointing angle of the receiving linear polarization antenna of the application is varied, the polarization of the incident signal and the receiving linear polarization antenna are not all orthogonal, the polarization mismatch phenomenon is avoided, the problem that the DOA parameter cannot be estimated in an extreme case is solved, the robustness and precision of the polarization parameter measurement are improved, and more superior unblurring performance and DOA estimation precision can be obtained in a wide frequency band range. The method of the application can be applied to the design of a phase interferometer.

The invention relates to an antenna polarization reconstruction method and device, a terminal, a base station and a readable storage medium, relates to the technical field of antenna design, and can solve the problem of coexistence of Band13 and GNSS scenes. The method comprises the following steps: determining operation states of a global satellite navigation system module and a target communication frequency band module; a polarized reconfigurable antenna in the global satellite navigation system module comprises two spiral antennas which are arranged in parallel; the polarization reconfigurable antenna realizes polarization reconfiguration by adjusting the polarization mode of the two spiral antennas; in response to the situation that the global satellite navigation system module and the target communication frequency band module are both in the working state, determining rotation directions in the two helical antennas; according to the rotation directions of the two helical antennas and the polarization mode of the antenna in the target communication frequency band module, adjusting the polarization mode of the two helical antennas to be a target polarization mode; the target polarization mode is different from the polarization mode of the antenna in the target communication frequency band module.

This invention relates to a method for drawing antenna radiation patterns under full-size target conditions, relating to the field of testing, and includes the following steps: adjusting the center of gravity of the full-size target to the center point of the quiet zone relative to the rotation axis of the turntable; calculating the distance between the aperture of the antenna under test and the center point of the quiet zone based on the center of gravity of the full-size target and the aperture position of the antenna under test; adjusting the support frame to make the center height of the antenna under test the same as the center point height of the quiet zone; setting the polarization of the transmitting antenna and connecting the transmitting link; setting the polarization and installation angle of the antenna under test and connecting the receiving link; computer-controlled turntable rotating from a -180° azimuth of the full-size target to +180° in a top-down counterclockwise direction, transmitting the angle signal to a spectrum analyzer or computer during the rotation; and drawing the antenna radiation pattern of the full-size target based on the test and calculation results. This invention has the advantage of being able to quickly and easily obtain the antenna radiation pattern of the antenna under full-size target conditions.

A wireless communication method, terminal device, and network device, the method comprising: the terminal device determining an antenna polarization mode corresponding to a first physical channel or a first reference signal transmission on a first bandwidth portion (BWP) as a first antenna polarization mode, and / or, the terminal device determining a quasi-co-located QCL reference signal corresponding to the first reference signal on the first BWP as a second reference signal on a second BWP.

The embodiment of the invention provides a traveling wave array antenna design method and a traveling wave array antenna, and the design method comprises the steps: determining the number and shape of radiation units required by a target traveling wave array antenna, an antenna polarization mode and a series feed mode according to the performance demand index of the target traveling wave array antenna; the radiation current or radiation power of each radiation unit is determined through shaping weighted design; simulating and analyzing the energy loss characteristics on the main feeder line; calculating and determining the radiation conductance of each radiation unit; determining the width and resonance length of each radiation unit; forming an initial linear array; the initial impedance value of the input end of the initial linear array is set in a simulation mode, and a terminal load matched with the initial linear array is designed in a simulation mode based on the initial impedance value; and after the terminal load matching design is completed, performing impedance matching design on the input end of the initial linear array to obtain a target traveling wave array antenna with a target impedance value. According to the embodiment, the working bandwidth of the antenna can be effectively improved.

The invention discloses a multi-degree-of-freedom ultra-wideband time domain radiating antenna testing device, and belongs to the technical field of antennas. The device comprises a base, a cylindrical framework, an orientation rotating mechanism, a height lifting mechanism, a polarization adjusting mechanism and accessory equipment. The base is provided with universal wheels and leveling supporting legs; the cylindrical framework supports the azimuth rotating mechanism, and accurate adjustment of the azimuth angle of the antenna is realized through gear transmission and a manual rocking handle; the height lifting mechanism uses a rack and a linkage rod to synchronously lift the antenna and lock the height; the polarization adjusting mechanism adjusts the polarization direction of the antenna through an I-shaped fixing seat and a rotating assembly, and adapts to various antenna types. The multi-degree-of-freedom adjusting function of orientation, height and polarization is integrated, under the condition that the position of a measuring sensor is not changed, time domain directional diagram testing, cross polarization level testing and the like of the ultra-wideband radiating antenna can be efficiently and conveniently achieved, the testing efficiency is remarkably improved, the multi-degree-of-freedom adjusting device is suitable for testing sites with different flatness, and the multi-degree-of-freedom adjusting device is convenient to erect and move and withdraw in emergency situations.

The invention discloses a compact three-frequency-band hemispherical beam combined antenna, which comprises a metal base, an azimuth turntable and UHF (Ultra High Frequency), L and S-frequency-band antennas. The UHF antenna is installed on the rotary table at an inclination angle of 35 degrees, and hemisphere coverage is achieved through rotation. The L antenna and the S antenna are installed on the two sides above the UHF antenna through a glass fiber support, and a low-profile microstrip antenna form and a four-arm spiral antenna form are adopted respectively. Through the UHF antenna 45-degree polarization design, the high-frequency antenna feeding point bias and the feeder common ground structure, mutual coupling between frequency bands is effectively inhibited. The overall size of the antenna is about phi 250 mm * H350 mm, the three frequency bands all have good hemispherical wave beams, low standing-wave ratios and optimal circular polarization performance, the antenna is suitable for mobile satellite communication equipment, and the integration level and the multifunctionality are improved.

The invention relates to an electromagnetic leakage suppression and key diversity transmission method and device based on a star flash keyboard, and the method comprises the steps: dispersing the sweep frequency energy of a target wireless keyboard to a plurality of frequency bands through an SLB protocol message based on frequency hopping modulation and polarization state modulation of a dual-polarized antenna; based on Polar code channel polarization characteristics and BICM coding, an AES key is segmented and dynamically embedded into reliable sub-channel bits; through dynamic bit interleaving, AES secret key fragments are dispersed and embedded into redundant bits of an SLB protocol message; a plurality of antennas are used for cooperatively receiving interleaved data, and an AES key fragment is recovered and the data is decrypted through a space diversity and joint decoding method. Through frequency hopping modulation and antenna polarization modulation and in combination with secret key fragmentation interleaving, electromagnetic leakage is inhibited, the secret key transmission risk is reduced, and the anti-interference capability is improved.

The present application relates to the field of electronic countermeasure, especially to a portable signal polarization detection method, which comprises a portable signal polarization detection device, the portable signal polarization detection device is composed of a first antenna, a second antenna and a receiving polarization test equipment, the first antenna and the second antenna are connected to the receiving polarization test equipment through equal-amplitude and equal-phase radio frequency cables; the working frequency bands of the first antenna and the second antenna should be consistent with the signal frequency to be measured, or should cover the signal frequency to be measured; the first antenna and the second antenna are linear polarization antennas, the two antennas are orthogonally installed together, the first antenna is a horizontal polarization antenna, and the second antenna is a vertical polarization antenna. The operation is simple, the measurement is fast, the volume is small, the weight is light, and the portable signal polarization detection device is convenient to carry or integrated with other equipment.

The invention relates to a full-duplex system signal transceiving isolation suppression processing system and method, in particular to a signal transceiving isolation enhancement method applying antenna polarization isolation, microwave cavity band-pass filtering, multi-stage series FBAR band-stop filtering, multi-path parallel SAW narrow-band filtering and shunt digital filtering processing modes, and is applied to a full-duplex system with a close transceiving frequency interval. Signal receiving, filtering and processing scenes of a flexible load communication satellite are realized, the method can be used for receiving equipment of a ground communication system, the signal receiving and transmitting isolation capability of a full duplex system is improved, and the resistance to self interference and external interference is enhanced.

A polarisation converter 100 comprises: a first planar array layer 120 of spaced apart electrically conductive dipole elements; a second planar array layer 140 of spaced apart electrically conductive

The invention discloses a device capable of automatically converting broadcast television antenna polarization and a control method thereof, and relates to the technical field of broadcast television antennae, the device comprises a mobile platform, a lodging mechanism is assembled and connected above the mobile platform, a rotary table is fixedly assembled and connected to the top end of the lodging mechanism, and the rotary table can rotate by 360 degrees around the axis of a working part of the lodging mechanism; half-frame-shaped swing arms are assembled and connected to the two sides of the rotary table, the swing arms can rotate around the side face of the rotary table, an antenna is assembled and connected to the swing arms, the rotary table can drive the swing arms to perform 360-degree horizontal rotation so as to achieve 360-degree horizontal rotation of the antenna, and the rotary table can drive the swing arms to perform 0-90-degree pitching swing so as to achieve switching between a horizontal polarization mode and a vertical polarization mode of the antenna; the device is mainly used for radio and television wireless signal measurement, can automatically lift, rotate and convert polarization modes, has the characteristics of high flexibility, strong applicability and the like, and can effectively reduce the workload of manual assembly and test operation.

The application relates to the technical field of microwave antennas, in particular to a small-sized wideband polarization antenna based on a single-ridge horn and a log-periodic antenna, which is convenient to process, stable and reliable, small in size, and characterized in that the small-sized wideband polarization antenna comprises a dual-polarization diversity mode of vertical polarization and horizontal polarization, electromagnetic fields of two polarization ports are orthogonal in a far radiation zone, polarization port one adopts a small-sized printed log-periodic antenna with a locally buried dielectric, and polarization port two adopts a single-ridge ultra-wideband horn antenna; compared with the prior art, the scheme is simple in design, convenient in processing and assembly, low in cost, beneficial to engineering application, suitable for application in a dual-polarization radar system, an electronic countermeasure system and a wireless communication system, and has relatively important application value.