37results about How to "Achieving Directed Radiation" patented technology

The invention provides an ultra-wideband high-gain antenna based on a radial disk impedance converter. According to the ultra-wideband high-gain antenna, the radial disk technology is introduced into the ultra-wideband antenna design for the first time, the design of the radial disk impedance converter is added to a feeding position of the antenna, the ultra-wideband operation problem of different transmission line converters in a feeding system can be solved, and the effect that an antenna radiator can achieve effective conversion and directed radiation of electromagnetic energy under the condition of wideband feeding can be guaranteed. Meanwhile, a ridge waveguide structure with electric field and magnetic field centralizing effects is adopted, and two side surfaces of a ridge waveguide cavity used for energy exchange adopt a triangular ridge structure with an ultra-wideband property, thereby guaranteeing the effect that electromagnetic waves of different frequencies have well matched electromagnetic energy conversion cavities. The ultra-wideband high-gain antenna based on the radial disk impedance converter adopts the large-diameter gradually changing and ridge directional horn radiator design technologies, can achieve high gain and directed radiation of the antenna within ultra-wideband, and can control polarization characteristic and directional diagram sidelobes of the antenna.

The invention discloses a high-power microwave ring-focus double-reflector antenna, which includes a TEM-circular waveguide TM coaxially connected with a microwave source 01 mode converter, sub-reflector, main reflector and horn antenna, the sub-reflector is set opposite to the main reflector; the output end of the mode converter is connected to the horn antenna, and the inner and outer radii of the input port of the mode converter are in line with the microwave source Consistent; the sub-reflector is an ellipsoid, and the ellipse ET section rotates around the OT axis for one circle. The sub-reflector includes focus O and focus C. The phase center of the horn antenna is located at the focus O of the sub-reflector. The main reflector is a parabolic ring The surface is rotated around the OT axis by the parabola PQ section, and the focal point of the main reflector coincides with the focus C of the secondary reflector. The ring-focus double-reflector antenna is directly connected to the microwave source to achieve high gain. A coaxial mode converter is designed between the horn antenna and the microwave source to make full use of the axial space to make the structure compact, and finally realize the directional radiation concentrated in the axial direction.

The invention proposes a directional high-gain microstrip antenna, and mainly solves the problems of small gain and poor directivity in the prior art. A radiation unit consists of three rectangular patches, and is printed on the upper surface of an upper layer dielectric substrate, the rectangular patches of left and right sides are connected with the floor through first metalized via holes, the floor is printed on the support surface of a lower layer dielectric substrate, the central position is provided with a rectangular gap used for exciting the radiation unit, a T-shaped microstrip line is printed on the lower surface of the lower layer dielectric substrate and is connected with a feed unit, thereby realizing signal transmission, the floor is connected with a first metal bonding pad and a second metal bonding pad through second metalized via holes, the upper layer and lower layer dielectric substrates form a laminated structure, a reflecting plate is arranged under the laminated structure and is supported by the feed unit and a parasitic unit, thereby suppressing backward radiation, the feed unit is connected with the first metal bonding pad to transmit a radio frequency signal, and the parasitic unit is connected with the second metal bonding pad, thereby suppressing cross polarization. The antenna provided by the invention is high in gain and good in directivity, and can be used for a satellite communication and radar system.