Sequentially rotated gap‐coupled variations of plus shape microstrip antennas for dual band circular polarized response

Plus shape microstrip antenna for circular polarized response is proposed which gives VSWR and axial ratio bandwidth of 960 MHz (∼42%) and 101 MHz (4.97%), respectively. Using sequential rotation its gap‐coupled variations are proposed for dual band circular polarized response. With patches gap‐coupled along two co‐ordinate axis, an optimum dual band response showing axial ratio bandwidth of 97 MHz (4.3%) and 313 MHz (10.7%), with VSWR bandwidth of nearly 1000 MHz (>40%) is obtained.