Modified Rectangular Ultra Wideband Microstrip Antenna

Modified rectangular shape ultra wide band microstrip antenna with microstrip line feed is proposed. The effects of tapering structure on the realized bandwidth are discussed. The tapered end configuration yields bandwidth of 15.4 GHz with a peak gain of 2 dBi. Further, the effect of replacing the tapered end structure with an elliptical base structure is investigated. The elliptical base antenna yields slightly increased bandwidth and peak gain of 15.6 GHz and 2.3 dBi, respectively. Further effects of cutting slots in the ground plane of elliptical base structure were studied. The slot optimizes the resonance frequencies and impedance of fundamental and higher order modes, to yield bandwidth of more than 16 GHz with a peak gain of 2.6 dBi.