Active antenna

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

Method for testing coexisting co-located stray index of active antenna system

Abstract: The invention discloses a method for testing a coexisting co-located stray index of an active antenna system. The testing method comprises the steps that an environment calibration parameter is obtained through calibration of an established testing environment, and a tester arranges the active antenna system in the testing environment obtaining the calibration parameter, adjusts the system to be tested, enables the active antenna system to transmit wireless wave beams, transmits the wireless wave beams to a receiving antenna through space and determines the coexisting co-located stray index of the active antenna system according to a signal received by the receiving antenna and the testing environment calibration parameter.

Method for signal processing, active antenna and signal processing system

Abstract: The embodiment of the invention discloses a method for signal processing. The method is applied to an active antenna. The active antenna comprises a radio frequency port. The method comprises the following steps that the active antenna receives a first radio frequency signal sent by an antenna, wherein the first radio frequency signal is produced by a signal source; the active antenna acquires a radio frequency test signal after the first radio frequency signal is subjected to beam forming; the active antenna transmits the radio frequency test signal to a vector network analyzer through the radio frequency port, and enables the vector network analyzer to calculate the amplitude difference and phase difference of the radio frequency test signal and a reference signal to obtain a directional diagram of the active antenna, wherein the reference signal is the radio frequency signal which is received by the vector network analyzer and sent by the signal resource. The invention also provides the active antenna and a signal processing system. Equipment resources are saved and therefore the economic cost is saved.

Microstrip antennas on localized micromachined dielectric substrates

Abstract: Micromachining techniques using closely spaced holes have been used underneath a microstrip antenna on a high dielectric constant substrate (/spl epsiv//sub /spl gamma//=10.8) to synthesize a localized low dielectric constant environment (/spl epsiv//sub /spl gamma//=2.3). The bandwidth of a 12.8 GHz microstrip antenna, was improved from 0.8% to 7.8%, and the measured radiation efficiency increased from 40% to 70%. We believe that this technique can be applied to millimeter-wave (30-100 GHz) microstrip antennas on GaAs substrates to result in relatively wideband (4-6%) MMIC active antenna modules for phased-arrays and collision avoidance systems.

Built-in active antenna of mobile TV

Abstract: The utility model provides a built-in active antenna of a mobile TV, which belongs to the field of mobile TV signal reception, is connected with a mobile TV receiving chip and is used for receiving a mobile digital television signal. The built-in active antenna of the mobile TV comprises a built-in antenna and a low-noise amplifier which is connected with the built-in antenna and the digital television receiving chip. The built-in active antenna of the mobile TV passes through the low-noise amplifier to improve antenna gain so as to ensure the stability of the digital television signal received in movement.

Pattern reconfigurable millimeter wave microstrip quasi-Yagi active antenna

Abstract: A pattern reconfigurable microstrip quasi-Yagi active antenna is design by the finite-difference time-domain (FDTD) method in this paper This antenna operates at 50GHz and its radiation patterns can be reconfigured by using four switchable states The antenna can be applied to half-duplex communication and millimeter wave identification systems