Gap-Coupled H-Shaped Antenna for Wireless Applications

English-alphabet-shaped micro-strip antennas are reviewed in terms of antenna parameters and their applications. H-shaped patch antenna is designed with gap-coupled technique and a survey of previously designed H-shaped patch antenna are presented. The impedance bandwidths of the proposed H-shaped antenna at lower resonant frequency are 4.0% (HFSS), 4.2% (AWR) and 3.7% (experimental) and at upper resonant frequency are 7.6% (HFSS), 2.6% (AWR) and 9.4% (experimental). The frequency ratio of the antenna is 1.24, and the maximum gain of 1.97 dB and 2.52 dB for lower and higher resonant frequencies are observed. A broadside radiation pattern within the operating band and E-field beamwidth of 130 degrees and 109 degrees and H-field beamwidth of 111 degrees and 106 degrees, respectively, is observed at lower and upper resonant frequencies.