Sectoral Microstrip Antenna for Wideband Circular Polarized Response

Novel compact design of Sectoral microstrip antenna against increasing sectoral angle is presented for wideband circular polarized response. The detail study that put forward the effects of sectoral angle in patch, on orthogonal resonant modes is presented. It is noted that varying angle in Sectoral patch realizes the tuning amongst Sectoral patch TM
₁₀
and TM
₀₁
: modes and an optimum spacing between them realizes circular polarization. For Sectoral angle of 44°, wide band response with axial ratio bandwidth of larger than 10% is realized. The antenna exhibits broadside pattern across impedance and axial ratio bandwidth with peak broadside gain of above 6 dBi. As against regular shape microstrip antennas (circular, rectangular, triangular) using narrow slits or slot or the modified patch edges, proposed design is compact and offers larger circular polarized bandwidth. These are the new findings in the proposed study.