260results about How to "Low profile" patented technology

The invention discloses a microstrip MIMO antenna with a wide working frequency band and a wide decoupling frequency band, particularly relates to the technical field of microwave and millimeter wave communication, and solves the problems that most of the microstrip MIMO antenna mutual decoupling technologies in the prior art cannot be suitable for multimode broadband MIMO antennas; the technical problems that effective multi-mode mutual coupling suppression can be achieved only by additionally introducing a large-size metal structure or a stacked patch structure in a mutual coupling removal technology suitable for a multi-mode broadband MIMO antenna, and a high-integration-level planar broadband compact low-mutual-coupling MIMO antenna design scheme is lacked are solved. According to the technical scheme, on the basis of a single-layer planar microstrip antenna, a parasitic structure is loaded between two antenna units, and an antenna unit self-decoupling scheme is combined for design; the microstrip MIMO antenna is high in integration level and has a wide working frequency band and a wide decoupling frequency band at the same time.

The invention discloses a radiation-receiving type low-profile dual-beam array antenna and a folding decoupling design method. The low-profile dual-beam array antenna is composed of a transmission metasurface, a polarization conversion metasurface and a horn feed source. The transmission metasurface is formed by periodically extending and arranging m * m radiation-receiving units in a plane at equal intervals, and efficient transmission and spin decoupling focusing phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The radiation-receiving unit is composed of three layers of metal and two layers of dielectric plates. The polarization conversion metasurface is formed by periodically extending and arranging n * n polarization conversion units in a plane at equal intervals, and efficient reflection, polarization conversion and wave beam non-mirror image deflection phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The polarization conversion unit is composed of two layers of metal and a layer of dielectric plate. The low-profile dual-beam array antenna provided by the invention can generate two independently regulated orthogonal circularly polarized waves through spin decoupling under the excitation of a circularly polarized wave feed source, and has the remarkable advantages of high aperture efficiency, low profile and the like.

The invention discloses a directional diagram reconfigurable antenna capable of switching feed through an MEMS switch, and belongs to the field of radio frequency front-end devices. The directional diagram reconfigurable antenna is composed of a micro-strip radiation unit, a guide parasitic unit, a composite beam ohmic contact type MEMS switch, a one-to-four feed network, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradual change micro-strip line, a dielectric substrate and a metal ground backboard. The two-stage MEMS switches are erected on the one-to-four feed network, when the two-stage switches on a certain feeder line are turned on, radio frequency current can flow to the corresponding basic radiation unit through the feeder line to generate an inclined beam facing the quadrant, and the two basic radiation units on the front side can be enabled by simultaneously turning on the four switches on the front side to generate an inclined beam facing the quadrant. And generating an inclined beam in the front side positive direction. The antenna adopts a single-layer board design, the dielectric substrate does not need to be punched, the structure is simple, manufacturing is convenient, the adopted MEMS switch is small in loss and high in isolation degree, and rapid printing and manufacturing can be achieved through the surface etching process.

The invention provides a K-band broadband dual circularly polarized antenna applied to the satellite internet, and belongs to the field of circularly polarized antennae, the K-band broadband dual circularly polarized antenna comprises a radiation unit, a first dielectric layer, a metal ground layer, a bonding layer, a second dielectric layer and a feed network which are stacked from top to bottom, the radiation unit comprises two first radiation patches and two second radiation patches, the first radiation patch is provided with two long rectangular grooves which are vertically intersected, the second radiation patch is provided with two short rectangular grooves which are vertically not intersected, the first radiation patch and the second radiation patch are respectively connected to the metal ground layer through metal columns, and the metal ground layer is provided with a first coupling gap and a second coupling gap. A first rectangular groove, a second rectangular groove, a third rectangular groove and a fourth rectangular groove are formed in the metal ground layer, and the feeder network comprises a first microstrip feeder and a second microstrip feeder; the antenna structure is low in profile, wide impedance bandwidth can be achieved, and the two feed ports can work in the same frequency range.

The invention discloses an attitude synchronization method for landing of a ship-borne rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle landing regulation and control, and the method comprises the following steps: 1, firstly, respectively collecting data of a ship-borne AHRS system and an airborne sensor, and after the data collection is completed, carrying out attitude synchronization on the ship-borne AHRS system and the airborne sensor; the data of the ship-descending AHRS system and the data collected by the airborne sensor are fused, and the relative attitude deviation and the position deviation of the ship are estimated after fusion. According to the method, the requirement of the ship-based unmanned aerial vehicle for a landing window in the landing stage is lowered, the computing power requirement for an airborne computer of a mobile platform is lowered, cost, weight and energy consumption are saved, higher safety is achieved, the collision risk caused by ship attitude changes in the landing process is reduced, the automation degree of landing is improved, and the probability that manual catching is needed is lowered.

The invention discloses a terahertz wave band circularly polarized antenna based on sequential rotation feeding, and belongs to the field of radio frequency front-end devices. The circularly polarized antenna is composed of four microstrip patches, chamfers located on a radiation patch, a microstrip line, a microstrip line feed port, a sequential rotation feed network, a dielectric substrate, a metal ground backboard and a microstrip line matching structure. A 90-degree phase difference is generated by strictly designing the electrical length from each port to the feed network to realize circular polarization performance, right-handed circularly polarized waves are radiated, the radiation gain is 10.47 dB, the 3dB axial ratio bandwidth is greater than 8GHZ, the 3dB axial ratio range exceeds 90 degrees, and the complete half-power beam width is covered. The antenna adopts the microstrip line for feeding, the loss of the microstrip line is small, the microwave transmission characteristic is good, and the antenna radiation efficiency is high. The antenna adopts a single-layer board design, has no complex feed network, and is simple in structure and convenient to manufacture.

The invention discloses a narrow pulse ns-level time delay compensation type plane reflection array antenna, and belongs to the technical field of antennas. The array antenna comprises a reflective array antenna and a feed source, and each array element in the reflective array antenna performs corresponding time delay compensation on electromagnetic waves emitted by the feed source according to the distance between the array element and the feed source so as to improve the gain of a reflective wave beam in an expected direction. According to the invention, a time delay type compensation method is adopted to enable the pulse signals fed into the plane reflection antenna array to realize simultaneous, equal-amplitude and same-phase superposition in a far field, so that the time domain pulse distortion phenomenon is avoided, the time delay compensation of electromagnetic waves fed into the plane reflection antenna array can be effectively realized, and the antenna gain and the fidelity of received signals are improved.

The invention discloses a millimeter wave polarization and directional diagram reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of symmetrical rectangular radiation patches, and a semicircular defect, a quarter circle defect, a rectangular branch load, an orthogonal bidirectional feed network, a T-shaped power dividing feed network, a composite beam ohmic contact type MEMS switch, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradient matching structure, a dielectric substrate and a metal ground backboard which are located on the radiation patches. When the single-side MEMS switch on the T-shaped power dividing feed network is switched on, energy flows to the radiation unit on the side, and the leftward or rightward wave beam inclination effect can be achieved. When the MEMS on the two sides are both switched on, the radiation pattern points to the Z positive axis, no beam deflection exists, and therefore the pattern reconfigurable function in the left direction, the middle direction and the right direction can be achieved. When a switch on the orthogonal bidirectional feed network is closed, the size of the long line can realize 90-degree phase delay, and two orthogonal degenerate modes are synthesized into a circularly polarized wave to cover a complete half-power beam width.

At present, a multi-feed-point antenna form is mostly adopted by a dual-frequency dual-circularly-polarized common-caliber antenna, and a complex feed network needs to be added, so that the loss of a system is increased, and the cost is not favorably reduced. According to the dual-frequency dual-circularly-polarized common-caliber microstrip antenna provided by the invention, two circularly-polarized microstrip antennas working in the S frequency band and the C frequency band respectively adopt a 1: 4 ratio nested design, and the S frequency band antenna patch adopts a four-leaf boomerang-shaped design, so that the shielding effect of the S frequency band antenna on the C frequency band antenna is reduced, and the isolation characteristic between the S frequency band antenna and the C frequency band antenna is improved; the problem of signal interference between nested antennas is solved; and meanwhile, the gap of the C frequency band is rotated, and the feed strip lines of the dual-frequency-band antenna are arranged on the same layer, so that the low-cost design of the dual-frequency nested antenna is realized.

The invention discloses a polarization conversion wave-absorbing ultra-wideband stealth metasurface structure which comprises a polarization conversion layer, a first filling layer, a frequency selection surface layer, a second filling layer and a wave-absorbing layer which are sequentially arranged from top to bottom. The polarization conversion layer comprises a polarization conversion patch, the polarization conversion patch comprises a plurality of 2 * 2 subarrays, and the angle arrangement difference between adjacent 2 * 2 units is 90 degrees. The frequency selective surface layer comprises a first patch, a second patch and a third patch which are sequentially arranged from top to bottom. The wave absorbing layer comprises a resistive film patch, and the impedance of the wave absorbing layer is matched with that of the second filling layer.

The utility model discloses an air dielectric RNRD antenna structure. The air dielectric RNRD antenna structure comprises a ground reflecting plate, a dielectric plate, a radiation sheet assembly, a grounding coupling assembly and a feed assembly. The dielectric plate is arranged on one side of the ground reflecting plate, and the dielectric plate and the ground reflecting plate are arranged at an interval to form a gap for air medium circulation; the radiation sheet assembly comprises a first radiation sheet and a second radiation sheet, the first radiation sheet and the second radiation sheet are attached to the side, back to the ground reflection plate, of the dielectric plate, the first radiation sheet is provided with a hollow area, the second radiation sheet is located in the hollow area, the grounding coupling assembly comprises a grounding coupling branch knot and an induction sheet, and the feed assembly comprises a coupling feed point. And a direct feeding point and a direct feeding needle. According to the technical scheme of the utility model, the grounding coupling assembly, the feed assembly, the first radiation sheet and the second radiation sheet generate direct feed or coupled feed, so that the section of the RNRD antenna structure is lower, the size and the volume are lighter, and the manufacturing cost of the antenna is reduced.

The invention discloses an integrated low-profile broadband programmable metasurface antenna which comprises an antenna cover, an integrated low-profile programmable metasurface and a structural frame. The integrated low-profile programmable metasurface comprises an integrated low-profile programmable metasurface array surface; the integrated low-profile programmable metasurface array surface comprises a plurality of integrated low-profile programmable metasurface units; the integrated low-profile programmable metasurface unit is sequentially provided with a metal radiation patch, an upper dielectric substrate, a bias control line layer, a semi-cured bonding sheet layer and a strip line feed network layer; the metal radiation patch is printed on the front side of the upper dielectric substrate, the bias control line layer is printed on the rear side of the upper dielectric substrate, and the upper dielectric substrate is bonded with the strip line feed network layer through the semi-cured bonding sheet layer. The invention has the advantages of low profile, low power consumption and light weight; the antenna is high in radiation efficiency, and is suitable for the military fields of satellite communication, navigation, unmanned aerial vehicle data link terminals and the like with beam scanning and tracking capabilities.

The invention provides a low-profile indoor distribution antenna, and relates to the technical field of antennae, the low-profile indoor distribution antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate which are connected in sequence, each structure is compact, and a low-profile effect is realized. Moreover, the plurality of first short-circuit columns, the plurality of second short-circuit columns and the plurality of third short-circuit columns are all distributed in a semicircular manner, so that the roundness of a directional diagram of a radiation signal can be improved. Due to the existence of the second resonant cavity, the function of frequency selection and filtering is realized, so that the low-profile indoor distribution antenna is integrated with the pilot frequency decoupling capability. Compared with the existing quasi-omnidirectional antenna, the low-profile indoor distribution antenna has the advantages of high performance, low profile and simple structure in addition to realizing the out-of-band harmonic suppression function, and realizes the integration and function fusion of the antenna and the filter.

The invention discloses a waveguide power dividing device with a ridge on an H surface and a waveguide antenna, and belongs to the technical field of antennae, the waveguide power dividing device comprises a waveguide power divider, the waveguide power divider adopts a T-shaped structure, the waveguide power divider is provided with a waveguide transmission line, a branch waveguide A and a branch waveguide B, and the ridge is arranged on the H surface of the waveguide power divider; the feed end of the waveguide transmission line is used for feeding, the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are used for radiation, and the electric fields of the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are in the same phase. According to the invention, the problem that the directions of electric fields are opposite when H-plane waveguide feed passes through a one-to-two power divider is solved. According to the waveguide antenna, the waveguide power divider with the H face and the ridge is adopted, the complex structure of waveguide E-to-H is simplified, and meanwhile the profile of the antenna can be further reduced; the waveguide antenna provided by the invention has the characteristics of ultra wide band, wide beam, low side lobe and the like.

The invention discloses a low-profile dual-circularly-polarized Ka-band phased-array antenna which mainly solves the problems that a traditional circularly-polarized phased-array antenna is high in profile, complex in structure and incapable of polarization multiplexing. The antenna feed structure and the metal patch structure are symmetrical, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch to excite the patch to generate left-hand circular polarization and right-hand circular polarization respectively, regulation and control from single circular polarization to dual circular polarization are achieved, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch, and the radiation patch is directly connected with the left-hand and right-hand circular polarization feed ports. The patches are excited to generate left-hand circular polarization and right-hand circular polarization respectively, other extra structures are not introduced, the antenna design process is simplified, and polarization multiplexing of the circularly polarized antenna is achieved. The antenna is composed of the two layers of dielectric plates, a complex middle feed network is omitted, and the antenna has the advantages of being simple in structure and low in profile.

The invention relates to an ultra-wideband flexible transparent ultra-thin metamaterial wave absorber, which solves the problems of low profile, wide bandwidth and insensitive polarization and angle of the wave absorber, and belongs to the field of electromagnetic metamaterials. The antenna comprises a first dielectric layer, a second dielectric layer and a third dielectric layer which are sequentially arranged from bottom to top, the first dielectric layer and the third dielectric layer are PET substrates; the second dielectric layer is a PVC layer; the upper surface of the third dielectric layer is provided with conductive film units which are arranged periodically, and the lower surface of the first dielectric layer is covered with a conductive film. The upper surface of the third dielectric layer is provided with four conductive thin film units which are periodically arranged, and each conductive thin film unit is an ITO resistive thin film with a cross-shaped pattern. According to the invention, the flexible PVC is used as the dielectric substrate, the PET is used as the reflection bottom plate and the resonance layer, and the conductive film pattern of the resonance layer is optimally designed, so that the absorption performance of which the absorption rate is greater than 90% is realized within the frequency range of 12.02-102.91 GHz, and the relative absorption bandwidth can reach 158.1%.

The invention discloses a three-dimensional coupling triple-band antenna for wireless network communication and a communication system, and belongs to the field of communication antennas. According to the antenna, a monopole main radiation unit, a first auxiliary oscillator unit, a second auxiliary oscillator unit, a first resonant structure, a second resonant structure, a third resonant structure and a feed port are respectively arranged on a metal base, and a shell which is buckled on the metal base and is used for protecting each component is arranged. The three-frequency antenna combines the monopole frequency doubling effect, the space electromagnetic coupling and the auxiliary oscillator resonance technology, realizes broadband work on three different frequency bands, and effectively improves the spectrum utilization rate and the communication performance of wireless communication equipment. And meanwhile, the vertically arranged metal rod structure oscillators are ingeniously adopted as the monopole main radiation unit to adjust the frequency doubling resonant frequency and reduce the height of the antenna at the same time.

The embodiment of the invention provides a multi-frequency miniaturized omnidirectional indoor distribution antenna, and belongs to the technical field of antennae, the multi-frequency miniaturized omnidirectional indoor distribution antenna comprises a grounding plate, a dielectric substrate and a feed member, and the grounding plate and the feed member are respectively and correspondingly arranged on two opposite surfaces of the dielectric substrate; a radiation slot and at least one notch slot are formed in the grounding plate, the radiation slot is of an annular structure, the notch slot is located on the outer side of the radiation slot, and the notch slot is in an arc shape concentric with the radiation slot. According to the multi-frequency miniaturized omnidirectional indoor distribution antenna provided by the embodiment of the invention, the problems that an omnidirectional indoor distribution antenna in the prior art is difficult to realize broadband multi-frequency characteristics, relatively high in profile and complex in design are solved.

The invention relates to the technical field of wireless communication, and discloses a low-orbit satellite communication Ku frequency band antenna, which is characterized by comprising a primary radiation patch, a secondary coupling radiation patch, a radiation aperture surface, a first broadband feed network layer, a coupling matching cavity layer, a second broadband feed network layer and a standard waveguide assembly, the working bandwidth of the antenna is improved based on a new form of combining the broadband feed network and the coupling metal cavity; the antenna can work normally in a Ku frequency band range; through the design of loading, stacking and the like, the antenna radiation layer, the coupling layer and the feed layer are located on the same plane, and the profile of the antenna is reduced; when the design is connected and integrated with other circuit systems, the overall profile of the antenna can be reduced; the antenna is compact in structure, convenient to assemble, excellent in electrical performance, high in antenna gain, wide in bandwidth, high in polarization purity, simple in structure and light in weight.

The invention relates to a broadband metasurface compact field antenna measurement system and a parameter optimization method thereof, and the system is characterized in that the system comprises a supporting device, a reflective metasurface, a first feed source horn and a second feed source horn; a reflective metasurface is fixedly arranged on the supporting device; the first feed source horn and the second feed source horn are located on one side of the reflective metasurface, and the focal length positions of the first feed source horn and the second feed source horn are arranged on the same horizontal line and are perpendicular to the reflective metasurface; the supporting device is used for supporting the reflective metasurface to ensure that the centers of the first feed source horn and the second feed source horn and the center of the reflective metasurface are the same point; the first feed source horn corresponds to an observed first quiet zone, the second feed source horn corresponds to an observed second quiet zone, and the first quiet zone and the second quiet zone are used for measuring the far-field performance of the antenna; and the reflective metasurface is used for adjusting the electromagnetic wave signal. The millimeter wave compact range measuring device can be widely applied to the field of millimeter wave compact range measurement.

The invention discloses a UWB antenna, and relates to the technical field of wireless communication. The UWB antenna comprises a substrate, a radiating body and a grounding body, the substrate is provided with a first surface and a second surface which are arranged back to back, the radiating body is arranged on the first surface in an attached mode, the radiating body is provided with a feed port, the grounding body is arranged on the second surface in an attached mode, the radiating body is electrically connected with the grounding body, and the feed port is connected with the grounding body. The substrate is provided with a first via hole and a second via hole which are arranged at an interval, the first end of the first via hole and the first end of the second via hole are both electrically connected with the radiator, and the second end of the first via hole and the second end of the second via hole are both electrically connected with the grounding body to form a closed loop. According to the scheme, the problems that the profile of an existing UWB antenna is high and the beam design difficulty is large can be solved.

This invention belongs to the field of microwave communication technology, specifically relating to a PIFA antenna for 5G dual-band coverage. The invention includes a rectangular metal patch on a top surface, a substrate, and a metal ground plane stacked from top to bottom. A row of grounding vias is disposed through the substrate, and this array of grounding vias is located at the lower end of one side of the rectangular metal patch on the top surface. A coaxial feeding structure is disposed below the rectangular metal patch on the top surface. The antenna excites its fundamental mode TM through the coaxial feeding structure. 0.5,0 Mode and three higher-order modes TM 0.5,1 Pattern, TM 0.5,2 Pattern, and TM 0.5,3 The pattern includes a rectangular metal patch on the upper surface with a first slot along its vertical center line; the first slot has an opening on the side furthest from the grounding via for adjusting the TM. 0.5,1 Pattern and TM 0.5,3 The resonant frequency of the mode; a pair of second slits are orthogonally arranged on both sides of the first slit; the second slits are used to modulate the TM. 0.5,0 Pattern and TM 0.5,2 The resonant frequency of the mode. The antenna design proposed in this invention has advantages such as simple structure, relatively wide dual-band coverage, small size, and low profile.

The invention discloses a low-profile ultra-wideband time-domain antenna, and the antenna comprises an installation platform which is provided with a rectangular metal cavity at a top opening position, and the rectangular metal cavity is used for transmitting or receiving electromagnetic waves; the antenna is arranged in the rectangular metal cavity, and the antenna is used for receiving or transmitting horizontally polarized electromagnetic waves; the antenna comprises an SSMA connector, a radiation metal sheet and a chip resistor, the SSMA connector is assembled on the radiation metal sheet, and the radiation metal sheet is provided with the chip resistor; a radiation main body of the radiation metal sheet is an asymmetric heterogeneous metal sheet, a feed matching groove, a structure transition groove and a radiation groove are arranged in the radiation main body, and the radiation main body is bent. The antenna is novel in structural form, simple and reliable, achieves the performances of ultra wide band, low profile, miniaturization, specific wave beam coverage range and the like, and has a wide popularization prospect.

The present invention discloses an L\S band dual-frequency common aperture filter antenna array and communication equipment, belonging to the field of communication antennas. The antenna array includes: a metal floor; a plurality of array-arranged magnetic resonance near-field parasitic filter antennas, including a dielectric substrate four, an L-shaped radiation metal strip arranged on an end face of the dielectric substrate four, a parasitic semi-circular metal strip and a coaxial device A; and a plurality of microstrip filter antennas, including a dielectric substrate three arranged on the metal floor, a dielectric substrate two arranged parallel to the dielectric substrate three, a parasitic metal patch, a coaxial device B and a Y-shaped radiation metal strip. The antenna array of the present invention can effectively reduce the hetero-frequency coupling between L\S band antennas by utilizing the filtering characteristics, and the L\S band antennas are compactly arranged by combining vertical and horizontal placement, and antenna units of different operating frequencies will not generate shielding and coupling, while realizing the compact and miniaturized layout of the common aperture array.

The invention provides a flush toilet capable of suppressing water leakage outside a machine and reliably reducing the risk that a water supply part is submerged by overflow washing water while achieving low profile. Specifically, the flush toilet according to the present invention is provided with a toilet main body and a flush water supply device for supplying flush water to the toilet main body, the flush water supply device being provided with: a water supply unit for supplying flush water supplied from a water supply source; a water storage tank which is provided to the rear or lower part of the toilet main body and which stores the washing water supplied from the water supply unit; a pump which sucks the washing water in the water storage tank and enables the washing water to flow to the toilet main body; and a plurality of overflow flow paths for overflowing the washing water exceeding the predetermined water level in the water storage tank to different positions, at least one flow path among the plurality of overflow flow paths being disposed below the upper surface of the inner edge portion of the toilet body.

The invention discloses a Ka-band low-cost dual-circularly-polarized wide-angle scanning microstrip array antenna, and belongs to the field of mechanical auxiliary scanning antenna arrays. The antenna comprises a lower-layer metal plate, a dielectric layer and an upper-layer metal plate, wherein the lower-layer metal plate is provided with a feed network, the dielectric layer comprises a dielectric disc located in the middle and two dielectric substrate slab waveguides symmetrically arranged on the left side and the right side of the dielectric disc, and the dielectric disc is used for achieving dual-circular polarization radiation and can rotate to achieve mechanical auxiliary scanning; and the upper metal plate is used for fixing the dielectric layer and is provided with a circular through hole for placing and shielding the radiation opening surface. The antenna solves the problems that polarization of a traditional VICTS antenna design is linear polarization, the influence of multipath interference is large, satellite communication is not facilitated, beam coverage of a traditional Pillbox antenna design is limited, and the scanning angle is large, and has the advantages of being wide in beam scanning range, circular in polarization, low in profile and low in cost.

The present application provides a multi-element electric small antenna with reconfigurable side-firing and horizontal omnidirectional patterns, including a first dielectric substrate and a second dielectric substrate arranged in parallel with each other; the first dielectric substrate is provided with a first radiating metal patch and a T-shaped connecting metal patch on the upper and lower surfaces respectively, and the second dielectric substrate is provided with a second radiating metal patch and a T-shaped radiating patch on the lower surface; the first radiating metal patch, the T-shaped connecting metal patch, and the second radiating metal patch are connected to each other through metal columns; PIN diodes are loaded on the first radiating metal patch, the second radiating metal patch, and between the second radiating metal patch and the T-shaped radiating patch, and the far-field directional pattern switching between side-firing and horizontal omnidirectional radiation is realized by switching the on-off state of the three PIN diodes. The present invention breaks through the previous directional pattern beam reconfiguration and antenna polarization mode reconfiguration, and realizes the reconfiguration of two types of directional patterns: vertically polarized horizontal omnidirectional radiation and circularly polarized side-firing.

The application discloses a medium strip MIMO filtering antenna with self-decoupling characteristics, and a 1*2 antenna unit array structure comprises two high dielectric constant medium strip resonators of a top layer, an upper layer low dielectric constant substrate layer, two metal strip structures of a middle layer, a lower layer low dielectric constant substrate layer, a metal ground layer and a bottom layer feeding structure. The two high dielectric constant medium strip resonators are arranged above the upper layer low dielectric constant substrate layer and arranged in an E plane; the two metal strip structures of the middle layer are respectively opposite to the two high dielectric constant medium strip resonators. A half-wave length mode of a signal is fed into the middle layer metal strip to excite a TM 10 mode of the top layer medium strip through coupling, so as to form a radiation band with two resonance points, and the two medium strip resonators are respectively arranged in a weak field area of each other, so that the designed antenna has filtering and decoupling functions at the same time, and a low profile and high efficiency effect are achieved.

This invention discloses a broadband circularly polarized integrated feed transmission array antenna covering the entire Ka-band, comprising an array surface and an integrated feed. The phase center of the integrated feed coincides with the focal point of the array surface, illuminating the array surface perpendicularly and forming a 45-degree angle with the array surface in the horizontal direction. The array surface comprises multiple array elements of different sizes arranged linearly. Each array element includes two orthogonally arranged first and second dielectric substrates, which have the same height but different thicknesses. The integrated feed comprises a stacked first and second PCB board. A substrate integrated waveguide is disposed on the first PCB board with coupling slots, and a substrate integrated waveguide cavity and annular metal patches surrounding the substrate integrated waveguide cavity are disposed on the second PCB board. This invention achieves a wide axial ratio bandwidth and gain bandwidth, and has the advantages of low profile, light weight, easy fabrication, and low cost.

The present invention provides a satellite-borne dual-band common-surface antenna array based on a metal structure. The antenna array is a metal structure and is divided into two parts. One part is a hollow frame structure, which adopts a Vivaldi structure antenna form. Through the design of structural folding, structural hollowing, coupling between units, etc., the antenna has good electrical performance in the P band; the other part is embedded between the P-band antenna units and is located at the bottom of the overall structure. It serves as a metal floor of the P band and can also realize the slot radiation waveguide of the X-band electrical performance. The present invention also designs the dual-band antenna arrays into a dual-polarization form, in order to avoid polarization rotation caused by multipath reflection when electromagnetic waves penetrate dense plants, thereby generating polarization mismatch.