Implementation of Truncated Microstrip Patch Antenna for Microwave Radio Communication

摘要

This study proposes the realization and implementation of a truncated microstrip patch antenna (MPA) for a microwave radio communication at a resonant frequency of 11 GHz. The truncated corner technique is employed to produce circular polarization with an axial ratio ≤ 3 dB by cutting the patch edges from the microstrip patch antenna. The measurement results confirmed that the proposed antenna has operated at a resonant frequency of 11 GHz with return loss performance ≤ -10 dB and VSWR ≤ 2. Furthermore, the circular polarization of the proposed antenna revealed an axial ratio ≤ 3 dB at resonant frequency of 11 GHz with fractional bandwidth of 6.95 %. From the field testing, a stable receive signal level could be obtained when the antenna's azimuth is in 90°, 180°, and 270°. Therefore, it can be inferred that the proposed antenna can be a future candidate for microwave radio commutation system application.