Broadband Rectangular Slot Cut Shorted 90? Sectoral Microstrip Antenna

Rectangular slot cut compact shorted 90° Sectoral Microstrip Antenna is proposed. An analysis to investigate the effect of rectangular slot which yields broader bandwidth is presented. The slot does not introduce any new mode but it reduces the resonance frequency of second order TM1/4,1 mode of the shorted patch. Due to its coupling with fundamental shorted TM1/4,0 mode, yields bandwidth of more than 500 MHz (>50%). Due to shorted patch, radiation pattern show higher cross polar levels with antenna gain of more than 3 dBi over the bandwidth.