Broadband Circularly Polarized Microstrip Patch Antenna With Diamond-Shaped Artificial Ground Structure
This paper presents a broadband circularly polarized patch antenna with an artificial ground structure (AGS), which has rotated rectangular unit cells with respect to the sides of the rectangular ground plane, as a polarizer.A two-element ( $2 imes 1$ ) array configuration of the antenna is also presented.The rectangular unit cells are rotated by 4