Design of a Voltage-Controlled Beam Scanning Antenna Array Based on CRLH TL

The voltage-controlled beam scanning antenna array based on the CRLH transmission line is designed with series power divider and three small antenna. The resonant frequency of the open-termination power divider is 2.5GHz, and the varactor bias voltage of the small antenna is from 8V to 2V. At the operating frequency of 2.5GHz, the horizontally polarized pattern of the antenna array is measured. When the bias voltage of the varactor is changed, the antenna array radiation beam scanning range is up to 96 degrees, and its radiation from backward to forward can be achieved by controlling the varactor bias voltage.