A wideband patch antenna is proposed. By using the
dual-layer patch configuration and modified L-strip feed technique,
the impedance bandwidth of the patch antenna for VSWR<1.2 is
broadened to 22% with respect to 900 MHz, which is superior to
the other available patch antennas. In addition, by means of the
modified L-shaped strip, the high cross polarization levels of the
proposed antenna are suppressed effectively. Simulation results are
compared with the measurements, and a good agreement is
obtained. The measurements show that the antenna has a low crosspolarization
level (<-20dB) and an acceptable gain level (~9dBi)
across the operating bandwidth. At last, a parametric study and a
design guideline of the proposed antenna are also presented to
facilitate the design and optimization processes for engineers.
