Broadband Slot Cut Rectangular Microstrip Antenna

Abstract 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 TM 02 , TM 11 modes and along with fundamental TM 10 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.