Study on low profile cp antenna by combining discrete grid model and parameter optimization

An improved low profile CP directional antenna with high gain is proposed, which combines the equiangular spiral antenna, ground and two discrete grid parasitic layers. Every rectangular element in the grid layer is expressed by its code height i(j.k) in 0.9~1.1, so that the whole antenna can be achieved by optimizing all these parameters. Later, the optimized low profile CP directional antenna is given, which verifies the validity of the optimization method.