A Beam-Steering Broadband Microstrip Antenna with High Isolation

In this paper, a 4.2–7.2 GHz (52.6%) beam-steering microstrip antenna was proposed. The proposed consists of three tapered slots and feeds. radiation directions the on plane are independent each other, feeds correspond to structures. Symmetry isolation trenches introduced improve between different ports. Radiation pattern simulation measurement show horizontal beam steering at sampled frequencies 4.2, 5, 6, 7.2 GHz. results shows that overlapped ports in E-plane H-plane can cover more than 200 degrees 60 degrees, respectively. Apart from capability beam-steering, high (more 28 dB) operating band is obtained.