Dual Band Microstrip Patch Antenna using Uniplanar EBG of Aperture type FSS

The dual band frequency selective surface (FSS) of uniplanar compact electromagnetic band gap (UC-EBG) microstrip patch antenna (MPA) is studied. The FSS is used for gain and bandwidth enhancement. Here, a surface with H-shape unit cell is used as the FSS superstrate which has been aperture coupled with the conventional MPA. This aperture coupled radiating MPA loaded by superstrate works as a resonant cavity antenna. The designed prototype has the pass band characteristics at dual frequencies of 10.3 GHz and 16.5 GHz which lie in the X-band and Ku-band, respectively. A parametric comparison between the conventional MPA and superstrateloaded MPA has been carried out. A gain enhancement of nearly 4dB is obtained after loading of MPA with UC-EBG superstrate. An improvement of 1.20% in the impedance bandwidth is obtained.