Design of a Fixed-Frequency Beam-Scanning Antenna Controlled by Voltage

A microstrip leaky wave antenna with operating frequency 2.5GHz is designed based on composite right/left handed transmission line. The beam scanning of the antenna can be controlled by changing the bias voltage of varactor in the antenna. And the performance, S-parameters and horizontal polarization pattern, of the antenna are investigated by simulation and experimental measurement, respectively. The results show that the designed antenna has better beam scanning, which is proper to be used in wireless local area networks and short-range wireless technology.