Microstrip Antenna Array with Grating Lobe Mitigation with Optimized Polarization

Many grating lobe mitigation methods to date use isotropic sources as array elements. This paper extends a grating lobe mitigation method that makes use of modular, convex pentagons as subarrays to completely cover an approximately circular, planar array, by using wideband, dual polarized microstrip elements. Through the use of the dual polarized elements, optimized polarization for an arbitrary polarization angle is achieved in the main beam direction, with a minimized cross-polarization component.