Modified Triangular Shape Microstrip Antenna For Circular Polarization

Novel design of modified triangular shape microstrip antenna for circular polarized response is presented. In modified design, an offset distance between two triangular shape patches optimizes spacing between patch TM10 and TM01 resonant modes to realize axial ratio bandwidth of 49 MHz (5.32%) with VSWR BW of 531 MHz (50.11%). It gives broadside radiation pattern over entire VSWR BW with peak antenna gain of more than 9 dBi.