A Miniaturized Dual-Polarized Patch Antenna with L-shaped Feeds For C-Band Applications

A miniaturized dual-polarized patch antenna with differential feeding is proposed for base stations. The dual-polarized patch antenna is composed of a radiating patch with the shape of triangle bends and L-shaped stepped type slots, two pairs of mutually vertical inverted L-shaped probes and feeding networks integrated on a reflector. The proposed patch antenna achieves the impedance bandwidth (the voltage standing wave ratio (VSWR)<1.5) of 16.3% ranging from 3.33 GHz to 3.92 GHz covering C-band and port isolation higher than 28 dB. And more importantly, the size of the patch antenna is only
$0.24\times 0.24\times 0.174\ \lambda_{0}^{3}$
(
$\lambda_{0}$
is the free space wavelength at center frequency). The realized gain is greater than 7.6 dBi with a stable radiation pattern over the whole working frequency band.