717 results about "Antenna radiation" patented technology

The invention provides a wide-angle scanning dual-circularly-polarized phased-array antenna unit, which belongs to the field of dual-circularly-polarized antennas and comprises a first dielectric layer, a second dielectric layer and a third dielectric layer which are sequentially stacked, the antenna radiator is arranged on the side, away from the second dielectric layer, of the first dielectric layer, the antenna radiator comprises four radiation patches, each radiation patch comprises a metal patch and a loading branch knot, and each metal patch is provided with a slotted structure; the first metal ground layer is clamped between the first dielectric layer and the second dielectric layer, and a cross coupling gap and a first coupling gap and a second coupling gap which are perpendicular to each other are formed in the first metal ground layer; the U-shaped feeder line is clamped between the second dielectric layer and the third dielectric layer, and two ends of the U-shaped feeder line are respectively connected with a coaxial feed column penetrating through the third dielectric layer; the second metal ground layer is arranged on the side, away from the second dielectric layer, of the third dielectric layer; an array is also provided; the problem that a traditional circularly polarized antenna is narrow in impedance bandwidth and limited in polarization is solved.

The invention provides a pilot frequency combiner and a multi-system access platform, the pilot frequency combiner comprises a first substrate waveguide resonant cavity, the first substrate waveguide resonant cavity is provided with at least two input feed line ends, the at least two input feed line ends are used for introducing excitation signals of different information sources, a second substrate waveguide resonant cavity is stacked on the first substrate waveguide resonant cavity, and the second substrate waveguide resonant cavity is used for feeding excitation signals of different information sources. The second substrate waveguide resonant cavity is provided with an output feeder end, and the second substrate waveguide resonant cavity and the first substrate waveguide resonant cavity share a cavity wall; the common cavity wall is provided with at least two through coupling holes, and the coupling holes are communicated with the first substrate waveguide resonant cavity and the second substrate waveguide resonant cavity, so that excitation signals input by the at least two input feeder line ends are transmitted to the second substrate waveguide resonant cavity, and are output to an external antenna radiation end after being combined by the output feeder line end. According to the pilot frequency combiner provided by the invention, the isolation degree of multi-band signals is relatively good, the frequency expansibility is also good, and the design flexibility is relatively high.

The invention relates to a forward millimeter wave radar antenna. The antenna comprises a body, a wide-beam waveguide antenna, a narrow-beam waveguide antenna and waveguide transmission channels, wherein the wide-beam waveguide antenna, the narrow-beam waveguide antenna and the waveguide transmission channels are integrated in the body; the waveguide transmission channels comprise a first waveguide transmission channel and a second waveguide transmission channel; the wide-beam waveguide antenna comprises a polarization conversion structure; the antenna unit comprises a first antenna radiation cavity, a first slot radiation slot and a first opening horn which are connected in sequence, and the polarization conversion structure is connected with the first antenna radiation cavity; a first choke groove; the narrow-beam waveguide antenna comprises a splitter which is connected with the second waveguide transmission channel; the antenna structure array comprises a plurality of sub-antenna structure units, and each sub-antenna structure unit comprises a second antenna radiation cavity, a second slot radiation slot and a second opening horn which are connected in sequence; and the second choke groove is arranged beside the antenna structure array. According to the invention, the requirements of short-distance wide-angle coverage and long-distance high-precision detection are met, and the production cost is reduced.

The invention belongs to the technical field of antennas, and particularly discloses an ultra-wide-band low-profile conformal double-ridge horn antenna which comprises a plurality of antenna radiation units which are arranged in a surrounding mode in the circumferential direction of an aircraft platform and can be installed with the aircraft platform in a conformal mode, and each antenna radiation unit comprises a double-ridge assembly and a feed assembly. Wherein the double-ridge assembly comprises a first ridge unit and a second ridge unit which are symmetrically arranged left and right, the opposite inner side surfaces of the first ridge unit and the second ridge unit are of curved surface structures, and the first ridge unit and the second ridge unit jointly form a horn section at the top and a waveguide section at the bottom; and the feed assembly is arranged on the waveguide section and is used for feeding to the first ridge unit and the second ridge unit. According to the horn antenna, through the structural design, the overall structure of the antenna is relatively compact, the size is relatively small, the height and the profile size of the antenna radiation unit can be reduced through the double-ridge curved surface structural design, and meanwhile the excellent frequency band width is achieved.

The technology described herein is directed towards a transceiver with beam scanning capability based on leaky wave antenna technology and substrate integrated waveguide technology, along with a metallic covering that determines which direction the antenna radiates signals. The leaky wave antenna can include different respective groups of slot pairs having different respective periodicities, corresponding to different respective beam steering directions. One or more metallic covers can be used to cover some of the slot pair sections, such that the sections under cover behave like a conventional substrate integrated waveguide and the exposed section(s) behave like conventional leaky wave antennas. The metallic covers can be moved as desired, such as attached via magnets. The transceiver can thus steer signals to a wearable or portable device that includes a passive metasurface while mitigating null regions. The slot pairs can be asymmetrical reflection-canceling slot pairs, to achieve broadside radiation while avoiding band-stop effects.

An antenna apparatus includes a board, an integrated circuit chip including a transmitting antenna and a receiving antenna and mounted on the board, a waveguide having a first aperture provided on the board side and surrounding the transmitting antenna and the receiving antenna in aperture view, a second aperture provided on a rear side with respect to the first aperture in a radiation direction of the transmitting antenna, and a first inner wall surface connecting the first aperture and the second aperture, a radio wave lens fixed to the second aperture, and a first radio wave absorber disposed on the first aperture side in a space surrounded by the first inner wall surface. At least part of the first radio wave absorber is located inside a first path of a first direct wave, and the first radio wave absorber is located outside a second path of a second direct wave.

The invention belongs to the technical field of antennas, and provides an E-plane decoupling two-unit metasurface indoor antenna, which comprises a first substrate structure and a second substrate structure which are stacked, wherein the first substrate structure is composed of a metasurface radiator, a first substrate and a bottom plate which are stacked in sequence; the metasurface radiator is sequentially provided with a first patch group, a second patch group and a third patch group from the two sides to the middle, and the third patch group is used for forming radiation edges on the surfaces of the two sides. The third patch group serves as a common patch group of the first patch groups on the two sides to form two separated radiation edges, each radiation edge corresponds to the first patch group on one side, when a decoupling structure is added to the third patch group shared in the middle column, radiation of the respective antenna radiation edge is not affected, and the radiation efficiency of the antenna is improved. Therefore, the influence on the impedance matching performance and the radiation performance is reduced.

The application provides an angle of arrival measurement method, an electronic device, a readable storage medium and a chip, and relates to the technical field of wireless positioning. The method is applied to an electronic device, and the electronic device comprises a first antenna and a second antenna. The antenna radiation field patterns of the first antenna and the second antenna are similar within a first angle range around the electronic device and are not similar within a second angle range around the electronic device. The method comprises the following steps: determining the difference between target parameters measured by the first antenna and the second antenna according to a wireless signal; determining the angle of arrival range of the wireless signal according to the difference; wherein the angle of arrival range is the first angle range or the second angle range; and measuring the angle of arrival of the wireless signal by using the first antenna and the second antenna according to the angle of arrival range. The technical scheme provided in the embodiment can improve the accuracy of angle of arrival measurement.

The invention discloses a broadband dual-circularly-polarized low-cost phased-array antenna array element, which comprises an antenna radiation structure and a slot feed structure which are arranged independently from each other, and is characterized in that the antenna radiation structure comprises a parasitic radiation layer, a first dielectric substrate, an excitation radiation layer and a second dielectric substrate which are arranged in a laminated manner; the slot feed structure comprises a slot layer, a third dielectric substrate, a strip-shaped transmission line and a fourth dielectric substrate; the antenna layer structure and the slot feed structure realize electromagnetic coupling transmission through the slot layer; a hollow symmetrical structure is arranged in the middle of the first dielectric substrate, and the hollow part is used as an air medium to reduce dielectric loss; the gap layer is provided with a multidirectional coupling gap structure; the strip-shaped transmission line is provided with at least two feed ports, and dual circularly polarized radiation is formed in the antenna layer structure through excitation of different feed ports. The antenna radiation layer has no metal through hole or blind hole, can be processed in a layered manner, has the advantages of low processing cost and high yield, and ensures impedance bandwidth while realizing dual circular polarization.

The invention relates to an unmanned ship dynamic channel modeling method in an offshore water surface environment, and the method comprises the steps: constructing a three-dimensional offshore water surface simulation scene which comprises a sea surface, a wharf facility, an unmanned ship cluster and a communication node; establishing a wireless channel propagation model based on a ray tracing method, and simulating a propagation mechanism of direct, reflection and diffraction paths; establishing a motion characteristic model of the unmanned ship under the action of waves, and obtaining six-degree-of-freedom pose data of the unmanned ship; generating multiple frames of scene copies in batches by adopting an intelligent batch processing dynamic reconstruction method; dynamically correcting an antenna pattern in each frame of scene copy according to the pose data so as to couple the influence of hull motion on antenna radiation characteristics; importing the corrected antenna pattern into the wireless channel propagation model to generate a dynamic channel response; simulation is executed, and channel data obtained through simulation are collected and analyzed. According to the method, the motion characteristics of the unmanned ship in waves and the wireless channel propagation mechanism can be accurately coupled, and the accuracy of dynamic channel prediction is improved.

The invention designs a short-wave over-the-horizon communication comprehensive simulation analysis method for the problems of cascade and comprehensive analysis of antenna radiation characteristics and radio wave propagation environments. The method comprises the steps of performing radiation characteristic simulation on a short-wave antenna, constructing an ionosphere model, simulating a propagation path of a short-wave signal in an ionosphere by adopting a ray tracing technology, integrating antenna characteristics, an ionosphere environment and a propagation mechanism, and calculating falling area energy distribution of the signal. And comprehensive evaluation and analysis of the reachable range of short-wave beyond-visual-range communication are realized. According to the method, the signal propagation path and fading characteristics of the signal from the radiation source to the receiving tail end can be comprehensively mastered, and guidance and basis are provided for antenna selection, erection, coverage area analysis and communication quality estimation in practical engineering application of short-wave beyond visual range communication.

The application discloses a large-scale plane one-way folding array antenna full-working-condition electric performance prediction method, which comprises the following steps: (1) determining a folding position according to a folding angle under different working conditions; (2) determining an array element position after folding according to the folding position and array antenna geometric parameters; and (3) determining a mode excitation coefficient according to each array element position information and single array element mode information, and then calculating electric performance under different working conditions. The application can quickly and accurately analyze folding array antenna radiation and scattering, and has important engineering significance for array antenna analysis and design.

The invention relates to the technical field of communication control, and provides a total radiator antenna applied to a wearable device and the wearable device, the total radiator antenna comprises a metal frame radiator, a feeding point, a ground feeding point and a radio frequency front end module; the metal frame radiator has no physical breaking joint and is configured as a frame structure of the wearable device; the at least four feeding points are distributed along the circumferential direction of the metal frame radiator and respectively correspond to signal excitation of different frequencies; the at least four ground feeding points are distributed along the circumferential direction of the metal frame radiator and are alternately arranged with the feeding points, and each ground feeding point is selectively grounded through a switchable filter circuit; and the radio frequency front end module is connected with the feeding point through an antenna switch and is configured to control the cooperative working state of the feeding point and the ground feeding point so as to realize radiation and reception of multi-band signals. According to the invention, under the condition of breaking through the physical size limitation of wearable small-size equipment, the performance target of antenna radiation of different frequency bands can be realized.

The utility model relates to the technical field of airborne equipment mechanism design, in particular to an embedded beacon antenna structure design, which comprises an aircraft skin and an antenna cover plate, a signal transmission assembly comprises an antenna radiation rod fixed on the inner bottom wall of an antenna shell, a feed head is fixedly arranged on the inner right wall of the antenna shell, and the feed head is fixedly arranged on the inner right wall of the antenna shell. The left end of the feed head is fixedly connected with a coupling ring, a capacitive load is fixedly installed on the inner left wall of the antenna shell, and an anti-interference assembly layer is arranged in the antenna shell. According to the embedded beacon antenna structure design, the antenna radiation rod, the feed head, the coupling ring and the capacitive load structure are all arranged in the antenna shell, and then the antenna shell is embedded into the aircraft through the aircraft skin, so that the antenna structure and the surface of the aircraft are conformal, and the influence on the overall aerodynamic performance of the aircraft is reduced; and the first shielding layer and the second shielding layer are additionally arranged in the antenna shell, so that the anti-interference capability of the beacon antenna during signal transmission can be further improved.

The invention relates to the technical field of antennas, and provides an antenna, a communication method and terminal equipment, and the method comprises the steps: attaching a metal floor to a first surface of a dielectric substrate; the first excitation element and the second excitation element are respectively arranged on the first side and the second side of the metal floor, and the sizes of the two elements are related to a target frequency band; an inner conductor and an outer conductor of the first feed assembly are correspondingly connected with a first feed point of the first excitation element and the metal floor respectively; an inner conductor and an outer conductor of the second feed assembly are correspondingly connected with a second feed point of the second excitation element and the metal floor respectively; the first feed assembly is used for providing first excitation current for the first excitation element; the second feed assembly is used for providing a second excitation current for the second excitation element; the first excitation current and the second excitation current with different phase differences can present different current distributions on the metal floor, so that the purpose of antenna radiation beam steering is achieved, the technical effect of wide beams is achieved, and thus space direction coverage on a target frequency band is achieved.

The invention belongs to the technical field of antennas, and particularly provides a multi-process hybrid integrated packaging antenna, which is used for solving the problem that an existing single packaging antenna is incompatible between high-density packaging of a chip and high-efficiency radiation of the antenna. The structure comprises a glass through hole antenna radiator 1, a wafer-level fan-out packaging chip 2 and a quasi-coaxial bonding structure 3, the wafer-level fan-out packaging chip feeds the glass through hole antenna radiator through a quasi-coaxial bonding structure, the quasi-coaxial bonding structure comprises a feed assembly, the feed assembly is of a quasi-coaxial structure and is composed of a center feed micro-convex copper column and a plurality of peripheral feed micro-convex copper columns, the center feed micro-convex copper column is located at the center position, and the peripheral feed micro-convex copper columns are located at the periphery of the center feed micro-convex copper column. And the plurality of peripheral feed micro-convex copper columns are uniformly and circumferentially arranged around the central feed micro-convex copper column. In conclusion, the advantages of wafer-level fan-out packaging and glass through hole antenna technologies are integrated, and high-density and high-integration-level chip packaging and efficient radiation antenna design are achieved.

The invention provides an integrated antenna integrating Beidou, low-orbit and Tiantong satellite communication and high-precision navigation positioning. A low-orbit satellite microstrip antenna, a GNSS high-precision microstrip antenna, a Tiantong microstrip antenna and a Beidou short message microstrip antenna are sequentially stacked on the upper surface of a PCB in a conical mode. A shielding cover is arranged on the lower side of the PCB; antenna radiation patches of the low-orbit satellite microstrip antenna are arranged on the outer edges of the upper surface and the lower surface of the low-orbit satellite antenna substrate and are not covered by the GNSS high-precision microstrip antenna; circuits of the low-orbit satellite microstrip antenna and the sky-pass microstrip antenna are arranged on the upper surface of the PCB circuit substrate. And circuits of the GNSS high-precision microstrip antenna and the Beidou short message microstrip antenna are arranged on the lower surface of the PCB. According to the invention, the four-in-one combined design of the antenna, the low-orbit satellite antenna, the Beidou short message antenna and the high-precision navigation antenna is adopted, so that the problem of performance insufficiency when each antenna is used independently is solved, complementation among the antenna, the low-orbit satellite antenna, the Beidou short message antenna and the high-precision navigation antenna is realized, and the cost is reduced; the electromagnetic compatibility between the antennas is improved through frequency band and polarization isolation design, and the stability of a communication link is guaranteed through interference resistance of the peripheral low-orbit satellite antenna.

The invention relates to the technical field of mobile phone antennas, in particular to a mobile phone antenna and electronic equipment for exciting a floor characteristic mode based on a shunt feed technology, and the mobile phone antenna comprises a dielectric substrate, an antenna radiation metal patch on the outer side of the dielectric substrate, a metal floor arranged below the dielectric substrate, a low-frequency inverted-F antenna and a power divider, a first low-frequency feed port and a second low-frequency feed port are respectively arranged on corresponding radiation patches on two sides of the metal floor, and the two feed ports are simultaneously and electrically connected with an output end of the power divider through feeder lines, so that parallel feed of the low-frequency inverted-F antenna is realized, low-frequency characteristic modes of two long sides of the metal floor are simultaneously excited, and the low-frequency inverted-F antenna is formed. The low-frequency-band radiation efficiency is improved, the working bandwidth is expanded, and integration with a radio frequency circuit of the whole mobile phone can be completed only through a single excitation source.

The invention provides a low-profile circularly polarized antenna unit for slot coupling feed and an array thereof, and the antenna unit employs a plurality of metal layers which are coaxially arranged, are sequentially stacked up and down and are separated through dielectric layers, thereby achieving the high integration of a feed network, a coupling structure and a radiation unit in the vertical direction of the antenna unit. Specifically, the parasitic patch and the radiation patch which are stacked and coupled up and down are adopted, so that the working bandwidth of the antenna unit is expanded; furthermore, the interference of a feed network on the radiation performance of the antenna is reduced through the separation of the upper metal ground and the lower metal ground, and meanwhile, two orthogonally distributed gap structures formed in the upper metal ground are matched with the microstrip transmission line to perform coupling feed, so that the circular polarization performance of the antenna unit is improved; in addition, periodically arranged metallized shielding through holes are formed in the edges of the antenna units, so that surface wave propagation and electromagnetic coupling between the units are effectively inhibited, and the performance stability of the antenna unit during large-angle scanning is improved while the low-profile characteristic of the antenna unit is ensured.

According to the embedded rapid scanning system, a detection device is vertically arranged on an installation support, the installation support is fixed to the position above a production line through two stand columns, an antenna can be placed on the production line after being produced and flows backwards, and when the antenna flows to the position below the detection device, the detection device is based on the near-field scanning and far-field conversion technology; the device transversely moves above an antenna radiation surface, samples a near field, measures amplitude and phase values of an oscillator, can also convert the amplitude and phase values into a vertical plane far-field directional diagram, extracts radiation parameters, is simple and rapid in test process, takes a production line as a workbench, does not need to be additionally provided with a workbench, reduces the size, is embedded in the production line, and improves the test efficiency. And when one antenna is tested to be unqualified, interception can be directly carried out, so that the yield of products is ensured.

The invention discloses a broadband wide-angle scanning phased-array antenna unit and an antenna array, and belongs to the technical field of antennae, the broadband wide-angle scanning phased-array antenna unit comprises a first substrate layer, a second substrate layer, a first metal ground layer, a third substrate layer and a fourth substrate layer which are arranged in sequence; the first substrate layer, the second substrate layer, the first metal ground layer and the fourth substrate layer are respectively provided with a parasitic patch, an antenna radiator, a coupling gap and a strip-shaped feeder in a laying mode. And the strip-shaped feeder feeds through a feeding point on the back surface of the fourth substrate layer, feeds to the antenna radiator through the coupling gap, and finally feeds to the parasitic patch through coupling of the antenna radiator, so that electromagnetic signals are radiated outwards. According to the slot coupling feed structure, the impedance matching between the feed structure and the radiation structure is remarkably improved, and the antenna performance is greatly improved.

The invention discloses a phase-free antenna measurement method, a phase-free antenna measurement system and a storage medium. The phase-free antenna measurement method comprises the following steps: constructing a measurement system comprising an antenna to be measured, a measurement probe, a fixed auxiliary reference antenna and software defined radio; the probe is controlled to move and sample on the scanning plane, and the SDR synchronously collects receiving signals of the probe and the reference antenna; based on the frequency domain transformation result of the two paths of signals, the radiation field amplitude of each sampling point and the relative phase relative to the reference antenna are directly calculated through non-iterative operation, so that complete complex electric field distribution on the scanning plane is reconstructed; and finally, obtaining a far-field directional diagram through near-field-far-field transformation. The fixed reference antenna is introduced to serve as a phase reference, synchronous acquisition and direct calculation are achieved in combination with the SDR, the antenna radiation field can be rapidly and accurately recovered without direct phase measurement or complex iteration in the single scanning plane and single scanning process, and the method has the advantages of being simple in system, high in measurement efficiency and high in signal drift resistance.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The embodiment of the invention relates to the technical field of communication, and discloses a radar antenna and an automobile intelligent driving system.The radar antenna comprises a substrate, an electromagnetic band gap structure layer, a ridge waveguide transmission structure and an antenna radiation layer, the electromagnetic band gap structure layer is provided with a pin unit, and the pin unit forms an electromagnetic shielding area; the ridge waveguide transmission structure is arranged in the electromagnetic band gap structure layer, one end of the ridge waveguide transmission structure is connected with a chip interface, the other end of the ridge waveguide transmission structure is connected with the antenna radiation layer, and the antenna radiation layer comprises a plurality of slot antennas arranged in the longitudinal direction and a plurality of choke groove assemblies. One choke groove assembly is adjacent to one slot antenna, and the electromagnetic band gap structure layer is connected with the antenna radiation layer to form a gap waveguide transmission channel. By means of the mode, electromagnetic connection between the layers can be achieved without a welding process, and the influence of welding quality difference on the antenna performance is avoided.

The invention relates to the field of large-spacing array antenna design optimization, in particular to a low-sidelobe large-spacing array antenna amplitude and phase design optimization method. Amplitude and phase values are randomly distributed for each large-spacing array element, the variation ranges of the amplitude and phase values are set, and a series of large-spacing array antenna radiation patterns with different characteristics can be generated through the random amplitude and phase combination, so that the large-spacing array antenna radiation pattern is more uniform in radiation. The rich radiation pattern data form a training data set of a neural network model, then the neural network model is trained through the obtained data set, and after training is completed, the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is input into the trained neural network model, so that the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is obtained. And outputting the optimized amplitude and phase distribution by the neural network model. The method is suitable for optimizing the design of the large-spacing array antenna.

The invention discloses a broadband / high gain / high isolation / low cross polarization dual polarized antenna for millimeter wave communication. The antenna is formed by combining and fastening three layers of dielectric plates through screws, and double surfaces of each layer of dielectric plate are coated with copper. From top to bottom, the first dielectric plate is provided with a square substrate integrated cavity (SIC) enclosed by metal through holes, a first metal layer is etched along the range of the SIC to form an open aperture for antenna radiation, and meanwhile, a windmill type metal patch is loaded at the central position of the aperture surface to maintain an internal electric field of the SIC to be in a TM mode in a working frequency band; the symmetrical structure provides a dual-polarization radiation condition. And meanwhile, the SIW feed transmission lines are orthogonally arranged, so that the requirement of high isolation between the two input ports can be met.

The present invention provides a dual board patch array antenna, comprising: a radio board; a first-layer antenna board and a second-layer antenna board; the ground plane of the radio board is in contact with the first radiation ground plane of the first-layer antenna board through a patch-type conductive pad to form an extended ground area of ground connection; the probes of the radio board pass through and contact the patch microwave transmission line of the first-layer antenna board to form an electrical connection; wherein the patch microwave transmission line is assigned to the antenna radiating element of the second-layer antenna board as a vertically polarized antenna and a horizontally polarized antenna; the antenna radiating element contacts the first radiation surface on the first-layer antenna board through the conductor pad on the first layer antenna board, so as to expand the radiation surface area of the dual board patch array antenna.

The embodiment of the utility model provides an antenna structure and a television, and the antenna structure comprises a dielectric substrate which comprises two through holes, and conductors are disposed in the two through holes respectively; the antenna radiator is arranged on the dielectric substrate, the antenna radiator is electrically connected with the conductor, the orthographic projection of the antenna radiator on the dielectric substrate is a first orthographic projection, and the length of the first orthographic projection along the first polarization direction is not equal to the length of the first orthographic projection along the second polarization direction; the first polarization direction and the second polarization direction intersect at the symmetric center of the first orthographic projection; the grounding metal piece is arranged on the side, away from the antenna radiator, of the dielectric substrate, the grounding metal piece is provided with an isolation area, and the through hole is located in the isolation area so that the conductor can be separated from the grounding metal piece. The antenna structure is a dual-polarized antenna and has metal resistance.

The application discloses a kind of consistency construction and multi-dimensional parameter joint setting method and system of space field of course beacon, it is related to aviation technology field, comprising: constructing the three-dimensional electromagnetic simulation model of course beacon antenna array, the radiation directivity diagram of antenna array and channel field type characteristics are analyzed;Antenna array is installed and checked and precision is reviewed;Determine that the radio frequency performance of full transmission link meets the requirements;According to correct transmission link, adopt the method of phase matching to carry out channel antenna pair phase matching and clearance antenna pair phase matching in turn, so that the phase of the radiation signal of each antenna pair is the same, and the spatial consistency of antenna pair is constructed;Near-field-far-field signal joint test setting is carried out, near-field test data and far-field test data are obtained, channel line, displacement sensitivity and clearance signal are evaluated, combined with simulation model and actual environment, complete multi-dimensional parameter joint setting.The method significantly improves the consistency and excellence of the final combined field pattern of the space field of the course beacon, and reduces the trial-and-error cost and rework times of flight verification.

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.