Measured performance of a ultra broadband dual polarized scanned array of ridge elements

The measured performance of a dual polarized array of ridge elements arranged in a square egg-crate lattice is presented. The array is designed to operate over a 4:1 frequency band (4.5–18 GHz), within a conical scan range of ± 22.5° and with a scanned VSWR less than 2. The test results show that these electrical characteristics have been achieved without any resonances or deep dropouts. Further, the cross-polar isolation is better than 20 dB within the scan coverage in all planes and is thus superior to the commonly used Vivaldi and Bunny Ear printed elements.