Dual-Beam Steering Microstrip Leaky Wave Antenna With Fixed Operating Frequency

摘要

A fixed-frequency dual-beam steering microstrip leaky-wave antenna is presented in this paper. A novel equation with finite-difference time-domain method is proposed to calculate the complex propagation constant of microstrip leaky-wave antenna. The microstrip leaky-wave antenna is excited by multiterminals. By control the novel feeding configuration, the microstrip leaky-wave antenna has the advantage of main lobe''s dual-beam and steering at fixed-frequency. The main lobe steers from 41$^{circ}$ to 63$^{circ}$ for right beam and from 117$^{circ}$ to 139$^{circ}$ for left beam symmetrically when operating frequency fixes at 7 GHz. This new microstrip leaky-wave antenna can easily be used as collision avoidance or automobile radar system.