Wideband Folded Feed L-Slot Folded Patch Antenna

A newly developed patch antenna, designated as the folded feed L-slot folded patch antenna, is presented in this letter. It consists of an L-slot folded patch that is shorted to the ground plane by a metallic wall and is fed by a folded structure. The patch has profile of 0.24lambda and length of 0.4lambda, where lambda is the free-space wavelength at the center frequency of its operating bandwidth. This antenna has impedance bandwidth of 133.3% (0.72 to 3.60 GHz) for SWR les 2, which is the largest value that can be achieved by a shorted wall patch antenna in the literature. As the proposed antenna can achieve such wide impedance bandwidth, it is very suitable for the multiband wireless communication systems nowadays.