Broadband circular polarization arrangement for microstrip array antenna

摘要

The invention relates to a circular polarization (CP) technique and a microstrip array antenna implementing this technique. Using four microstrip radiating elements with proper phasing of the excitation in a 2×2 array configuration, the technique averages out the cross- polarized component of the radiation, generating circular polarization of high purity. The technique is broadband and capable of dual-polarized operation. The resultant 2×2 array can be used either independently as a CP radiator or as the building subarray for a larger array.