Compact-High Performance Microwave Circularly Polarized Antenna Array at Lower Frequency Band

A four-layer antenna array is presented for lower microwave frequency band. The Evanescent coupling mode is applied for reduction of distance between adjacent resonators. The electrical parameters are obtained by 3D computer simulation. It was confirmed that novel design provides higher characteristics together with effective size reduction for circularly polarized plane antenna array at lower frequency band 2.8 GHz.