Fixed-frequency 1-D Fabry-Perot leaky-wave antenna with different radial direction

摘要

A one-dimensional (1-D) leaky-wave antenna (LWA) with different radial direction working at 13.2GHz is presented. The antenna was based on Fabry-Perot cavity which composed of a planar partial reflective surface (PRS) and a high impedance surface (HIS). The PRS was made by a printed circuit board which consisted of an array of printed dipoles and the printed circuit's dimension was modulated to reduce the side lobe level of LWA Meanwhile, the HIS was also fabricated by a printed circuit board which was loaded with capacitors that allow the tuning of reflection phase. The two boards were placed in a parallel-plate waveguide. When the capacitors' capacitance was varied, the cavity resonance condition was also changed, so that the antenna's pointing angle would change with capacitance at a fixed frequency. Both the results obtained with HFSS and experimental results of a LWA prototype show that when the capacitance of capacitors is varied, the antenna will have different radial directions.