14results about How to "Improve Caliber Efficiency" patented technology

The invention discloses a broadband high-efficiency 1bit circularly polarized reconfigurable transmission unit and an array antenna. The reconfigurable transmission unit comprises a circularly polarized wave receiving patch, an upper-layer dielectric substrate, an upper-layer metal ground plane, a middle dielectric substrate, a DC bias line, a lower-layer metal ground plane, a lower-layer dielectric substrate and a radiation patch which are sequentially arranged from top to bottom, and can directly realize two unit phases of 0 degree and 180 degrees of circularly polarized transmission waves; the equivalent rotation phase is free of dispersion; the state of each unit in the transmission array is controlled through the FPGA, + / -60-degree large-angle scanning of circular polarization transmission beams can be achieved, the beam performance is good, and high circular polarization purity is achieved. The array antenna provided by the invention has the advantages of wide axial ratio bandwidth and high aperture efficiency, and has relatively high application potential and value in scenes requiring real-time electric control circular polarization beam scanning antennas, such as application of long-distance radar detection, communication systems and the like.

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 relates to an electrically controlled liquid crystal 2-bit reconfigurable folding reflective array antenna, and belongs to the technical field of communication antennas. The antenna comprises a main reflective array, an auxiliary reflective array and a microstrip patch antenna array feed source located in the middle area of the main reflective array. Wherein a nylon column is arranged between the main reflective array and the auxiliary reflective array for supporting. The main reflective array comprises a plurality of reflective metasurface units which are periodically arranged and mutually independent; and the reflective metasurface units are used for carrying out polarization conversion and phase compensation on incident electromagnetic waves. The sub-reflection array comprises sub-reflection units which are arranged periodically and used for transmitting polarized waves which are not consistent with the feed source and reflecting the polarized waves which are consistent with the feed source. According to the invention, the aperture efficiency and the regulation and control precision of the antenna array are improved, and the advantages of low profile, easy integration and the like can be realized while high aperture efficiency and excellent two-dimensional scanning capability are maintained. In addition, a folded array structure is realized, and the problem of feed source shielding during antenna radiation is solved.

The invention discloses an ultra-wideband low-profile feed source loaded with a step medium, and relates to the field of ultra-wideband feed sources. The antenna comprises four log-periodic antennas, four groups of step dielectrics, dielectric cylinders, a reflection floor, a metal cavity and two feed baluns, the four log-periodic antennas are divided into two pairs which are orthogonally arranged, each pair comprises two log-periodic antennas which are oppositely arranged, the log-periodic antennas are fixed on the dielectric cylinder through screws, and an included angle is formed between the log-periodic antennas and the reflection floor; each group of stepped dielectric is formed by arranging twelve dielectric blocks in height stepped distribution, is positioned between the log-periodic antenna and the reflection floor, and clings to the reflection floor; the two feed baluns are orthogonally arranged, and each balun comprises a dielectric substrate, an index gradient microstrip line and a one-to-two power divider. The antenna is wide in frequency band, low in profile and suitable for serving as a primary radiator of a reflector antenna in the fields of satellite communication, radar detection, radio astronomy and the like.

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 the technical field of wireless communication, and discloses a low orbit satellite communication K / Ka frequency band broadband dual circularly polarized antenna. According to the technical scheme, the antenna is characterized by comprising a radiation port surface, a resonant cavity, a dual-circular polarizer, a quasi-TEM transmission air cavity layer, a left polarization broadband feed network layer, a right polarization broadband feed network layer, a TEM mode conversion terminal, a polarization switch, a transceiving duplexer, a first standard waveguide port layer and a second standard waveguide port layer. The antenna is simple in structure, has a self-packaging characteristic, is good in electromagnetic compatibility, and can achieve the high gain, wide bandwidth and high circular polarization purity of the antenna. The shielding air cavity is formed by structure stacking and the metalized through holes, and when a plurality of circuits are integrated together, mutual interference is small, the structure is compact, assembling is convenient, and electrical performance is excellent.

The invention discloses a phased-array antenna scanning device with a constant wave beam, which adopts radiation assemblies in a one-dimensional linear array form to radiate or receive radio-frequency signals, active TR assemblies are in one-to-one correspondence with the radiation assemblies, receive excitation signals sent by a radio-frequency network, perform phase shift amplification and then send the excitation signals to the radiation assemblies, and the active TR assemblies are in one-to-one correspondence with the radiation assemblies. Or receiving a radio frequency signal sent by the radiation assembly, performing phase shift and low-noise amplification, and then sending the radio frequency signal to the radio frequency network for combination; a power supply control module receives a control instruction transmitted by an upper computer, wakes up a corresponding TR assembly, calls an amplitude phase compensation value of a wakened active TR channel, and superposes a scanning phase compensation code calculated in real time and an amplitude windowing to realize electric scanning of a constant wave beam.

This invention discloses a high-power horn array antenna based on equal-power-division ridged waveguide feeding, characterized by high power capacity and high gain. A 4:1 unequal power distribution is achieved in the BJ100 waveguide placed along its short side by loading a cylindrical inductive post offset 5.2 mm from the branch centerline. Based on stepped impedance matching theory, an inductive module offset 5.2 mm from the branch centerline is loaded at the ridged waveguide branch to achieve a 4:1 unequal power distribution in the ridged waveguide placed along its long side. The antenna is entirely filled with sulfur hexafluoride gas to achieve even higher power capacity. A waveguide transition structure is applied to achieve a transmission transition between the standard rectangular waveguide and the ridged waveguide, and a metal plate is added to reduce the back lobe of the antenna pattern and improve the main lobe gain. The antenna feeding structure uses a standard BJ100 waveguide and its ridged waveguide, both with a waveguide wall thickness of 1.27 mm. This invention achieves a power capacity greater than 1MW in the 9.35~9.65 GHz frequency band, and within a 312mm×312mm aperture plane, the center frequency gain is greater than 29.6dBi, and the aperture efficiency across the entire frequency band is greater than 75%.

The application provides a broadband high-efficiency circularly polarized low-profile folded transmission array antenna, and relates to the field of antennas and microwave technology.The transmission array antenna comprises a feed source, a reflection array surface and a transmission array surface; the transmission array surface is arranged by a plurality of transmission units; each transmission unit comprises a transmitting patch; the transmitting patches are arranged according to a target rotation angle; the target rotation angle is an angle corresponding to the case that the transmission phase of each transmission unit is set to be the same as the first compensation phase of each transmission unit; the reflection array surface is arranged by a plurality of reflection units; each reflection unit comprises a polarization twist patch; the polarization twist patch comprises a pair of symmetrical curved sections and a connecting part connecting the two curved sections; the radii of the two curved sections are arranged according to a target radius; the target radius is a radius corresponding to the case that the reflection phase of each reflection unit is set to be the same as the second compensation phase of each reflection unit.The transmission array antenna has the advantages of high aperture efficiency and wide bandwidth.

The present invention discloses a broadband high-aperture efficiency planar reflection array. The present invention includes a horn feed and a planar reflection array. The horn feed is located directly above the center of the planar reflection array, and the emission center axis of the horn feed is perpendicular to the plane where the planar reflection array is located; the reflection array performs phase compensation on the electromagnetic signal radiated by the horn feed; the phase center of the horn feed coincides with the focus of the planar reflection array antenna. The planar reflection array includes a plurality of reflection units, and the horn feed generates an irradiation wave. Before and after the horn feed irradiates, the phase distribution of the plurality of reflection units on the planar reflection array remains unchanged. When the horn feed irradiates, the planar reflection array can generate a beam with a higher gain in a wide frequency band, achieving a broadband high-aperture efficiency effect. The planar reflection array of the present invention is a single-layer planar structure with a low profile, a wide bandwidth, a high aperture efficiency, and simple manufacture. It has broad application prospects in the fields of long-distance wireless communications such as radars and satellites.

The present invention discloses a reflective array unit based on germanium telluride and a millimeter wave frequency multiplexing reflective array antenna, wherein the reflective array antenna comprises a plurality of reflective array units, a dielectric substrate, a metal floor, and a feed source. The reflective array unit is located on the upper surface of the dielectric substrate, and is composed of a ring body and two phase delay lines. Two first germanium telluride films are embedded in the ring body, and the ring body is divided into two parts of equal length. Each part of the ring body is respectively connected to the middle of a phase delay line. Two second germanium telluride films are embedded in the phase delay line, and the two second germanium telluride films are symmetrical up and down with the middle of the phase delay line as the center. Both the first germanium telluride film and the second germanium telluride film can be turned on or off, so as to adjust the frequency or phase of the reflective array unit, and the frequency and phase are adjusted independently. The present invention not only has the characteristics of high aperture efficiency, wide gain bandwidth, and low cross polarization, but also has flexible unit phase adjustment and high design freedom.

The invention discloses a reflective array unit based on germanium telluride and a millimeter wave frequency multiplexing reflective array antenna. The reflective array antenna comprises a plurality of reflective array units, a dielectric substrate, a metal floor and a feed source. The reflective array unit is located on the upper surface of the dielectric substrate and is composed of a ring body and two phase delay lines, the two first germanium telluride films are embedded in the ring body and divide the ring body into two parts with the same length, each part of the ring body is connected with the middle of one phase delay line, the two second germanium telluride films are embedded in the phase delay lines, and each part of the ring body is connected with the middle of one phase delay line. The two second germanium telluride films are vertically symmetrical by taking the middle part of the phase delay line as a center, and the first germanium telluride films and the second germanium telluride films can be conducted or insulated, so that the frequency or the phase of the reflective array unit is regulated and controlled, and the regulation and control of the frequency and the phase are independent. The antenna has the characteristics of high aperture efficiency, wide gain bandwidth and low cross polarization, the unit phase regulation is flexible, and the design degree of freedom is high.

This application discloses a foldable screen device, relating to the field of electronic product technology. The foldable screen device includes a first body, a second body, and a first switching tuning circuit. The first body and the second body are rotatably connected. The first body includes a first radiator, and the second body includes a second radiator. The first radiator includes a first feed point, and the second radiator includes a second feed point. The first radiator is a radiator for a first antenna, and the second radiator is a radiator for a second antenna. The first feed point is a feed point for the first antenna, and the second feed point is a feed point for the second antenna. The first feed point is grounded through the first switching tuning circuit. When the foldable screen device is in a folded state, the first radiator and the second radiator are opposite each other. When the first switching tuning circuit is in a first state, the first radiator forms an auxiliary parasitic unit for the second antenna.

The present invention belongs to the field of antenna technology, and specifically is a periodically gradient ultra-wideband phased array feed. The ultra-wideband phased array feed of the present invention has a Vivaldi array antenna as its main body, which is composed of two Vivaldi antenna units with different unit widths and different bandwidths arranged in a certain way. The feed arrangement minimizes the number of units and reduces costs. Due to the ultra-wideband characteristics of the Vivaldi antenna array itself, the feed can achieve ultra-wideband operation. The feed uses a dense array to sample the focal plane field, which can enable the reflector antenna to achieve a higher aperture efficiency. The present invention can be used in a single reflector antenna system or a dual reflector antenna system to achieve ultra-wideband and high-efficiency operation of the reflector antenna.