3results about How to "Increase frequency bandwidth" patented technology

The application discloses a wide-band hat-type feed antenna and belongs to the technical field of satellite communication antennas. The method adopts a light-wall shaped horn loaded with an outer corrugated slot and a choke slot, improves horn and space matching, realizes expansion of a frequency band from 1.6:1 to 2.8:1, loads a slot at the horn mouth and the edge of the choke slot, realizes equalization characteristics of a feed radiation pattern, adopts a small-size sub-reflector to reduce shielding of the reflector, loads double choke slots in the reflector, reduces diffraction of the sub-reflector, and improves antenna radiation efficiency, and uses spline parameterization of the sub-reflector and the main reflector to realize integrated optimization design, so that the frequency bandwidth of the traditional hat-type feed is expanded, and good side lobe and efficiency performance are realized.

The utility model discloses a full-band antenna, comprising a housing, a lower cover and a joint, the housing is fixed on the lower cover, one side of the lower cover is provided with a screw rod, the joint is sleeved in the screw rod, the joint is cooperatively connected with a wire rod, one end of the wire rod is cooperatively connected with a PCB assembly, the PCB assembly is installed in the housing in an embedded manner, and the PCB assembly is fixed on the lower cover. The PCB assembly is composed of a mounting plate, a first radiation oscillator, a second radiation oscillator and a third radiation oscillator, the L support made of grounding metal and radiation metal serves as an antenna supporting structure, the L support and the metal rod are coupled to form a part of antenna radiation after installation, and the effects of prolonging frequency wavelength and increasing gain are achieved. The transmission distance is longer; the PCB assembly is used as a radiation oscillator of the antenna, and the PCB assembly and the radiation oscillator are combined together to form the full-band large-bandwidth mushroom antenna. The whole antenna is designed by combining monopole with a parasitic coupling principle, the frequency bandwidth is increased, the size is small, and the communication capacity is enhanced.

The invention discloses a totally-closed double-floating-body wave power generation device which comprises an outer floating body, an inner floating body, a buffer device, a rope winding device and a nonlinear bistable device. The buffer device is connected with a hydraulic device and a hydraulic power generation device; a wave-shaped groove is formed in the side surface of the inner floating body; the outer floating body comprises a buoy, a partition plate arranged in the buoy and an energy capturing floating body arranged on the buoy in a sleeving mode. The rope winding device is located on the partition plate. A hole is formed in the partition plate, and a guide wheel with a rotating shaft is arranged in the hole; the nonlinear bistable device comprises a pressing rod, a spring and a sleeve fixed to the inner side of the buoy. The cable winding device comprises a cable winding rope, a cable winding power generation device, a transmission shaft, a spring piece support and a spring piece. The non-linear bistable state device is used for providing non-linear restoring force, so that two stable balance positions appear when the outer floating body and the inner floating body generate relative heaving motion, a bistable state system is formed, the motion amplitude of the floating bodies is increased under wave excitation, the capture frequency band width is enlarged, and the wave energy capture efficiency is improved.