We discuss about circularly polarized microstrip antenna and there performance using EBGs. Use of
EBG total dimension of the structure is increased but performance of the antenna is also increased.
For simulation we consider LC modeling of EBG with and without vias radius. Without vias radius
consideration of EBG the output result is relatively higher but for more practical point of view one
should consider vias radius for simulation. In our simulation we show that changing the size and
spacing of EBG backward radiation can be removed. Simulations have done using Zeland IE3D
software.