Broadband Slot Cut Rectangular Microstrip Antenna

Variation of E-shaped Microstrip antenna, a broadband rectangular Microstrip antenna cut with three unequal length rectangular slots is proposed. A detail analysis to study the effects of rectangular slots that realizes broader bandwidth is presented. The slot reduces resonance frequencies of orthogonal higher order TM02, TM11 modes and along with fundamental TM10 mode, yields more than 450 MHz (>45%) of bandwidth. The realized bandwidth in the proposed configuration is more than the bandwidth obtained in equivalent rectangular patch antenna with U-slot or pair of rectangular slot i.e. E-shaped patch antenna. The proposed configuration gives broadside radiation pattern over the bandwidth with a peak broadside gain of more than 8 dBi.