Active antenna

About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.

Active antenna for mobile commucation

Abstract: PURPOSE: An active antenna for mobile communication is provided to increasing the efficiency of an antenna by reducing the transmission loss between a base station and an antenna CONSTITUTION: An active antenna for mobile communication is comprised of a diversity antenna(110), a transmitting and receiving relay, and a coaxial cable The transmitting and receiving relay is connected to the diversity antenna with a coaxial cable and is connected to an optical delay with an optical cable The transmitting and receiving relay converts an optical signal and a high frequency signal mutually and relays a signal for a G3 and Wibro service

Miniature three-prevention satellite receiving active antenna

Abstract: The utility model discloses a miniature three-prevention satellite receiving active antenna, and the antenna comprises a metal cavity, an amplifier, a micro-strip printed board, a cover plate, a pressure plate, an insulating plate, and an insulating bush. The metal cavity comprises a metal cavity inner side wall and a metal cavity outer side wall. The amplifier comprises an outer surface, a pin, and a radio frequency socket The micro-strip printed board comprises a printed board side surrounding edge and a metallized via hole. The cover plate comprises a cover plate inner side wall and a cover plate inner lower wall. The amplifier is disposed in the metal cavity, and is integrated with the antenna, thereby enabling the size of the antenna to be small and the nose to be low. The external surface of the metal cavity and the surface of the pressure plate are painted with three-prevention paint, thereby enabling the antenna to have functions of resistance to moisture, mildew and salt mist. The antenna is painted with thermal control paint, so the antenna can be adapt to a deep space environment.

Reconfigurable electrically small split ring resonator antenna

Abstract: A reconfigurable electrically small microstrip-fed antenna composed of a broadside coupled split ring resonator with stubs connected through pin-diodes and an exciting arc-shaped monopole is presented. Numerical and experimental results are presented for an antenna configuration of 1/24.3 wavelength λ in diameter (antenna is inscribed in a sphere with radius a, k — wave number), ka = 0.13. The antenna size including the ground plane is 68 × 44 mm2 and it operates at 149 MHz with 7.15 MHz bandwidth (VSWR<2). Its resonant frequency can be tuned over a wide range of frequency without changing the antenna size. The antenna can be used with metamaterial cover, as a part of the antenna array or an active antenna.

Array antenna and signal transmitting and receiving method and device

Abstract: The invention discloses an array antenna and a signal transmitting and receiving method and device The array antenna comprises at least two active antennas, wherein every active antenna is wound with at least two different passive antennas, every passive antenna is coupled to a controllable load, and the controllable load is coupled to a control circuit According to the array antenna, the at least two active antennas are provided, every active antenna is wound with the at least two different passive antennas and every passive antenna is coupled to the controllable load, so that when channels are in good conditions, the volumes of the channels can be adjusted by adjusting the controllable loads connected with the passive antennas, and when the channels are not in good conditions, by adjusting the controllable load coupled with the passive antennas simultaneously and adjusting the transmitting diagram of the active antennas according to adjustment vectors, the error rate can be reduced, and meanwhile, miniaturization can be achieved