A K- and V-Band Planar Dual-Polarized Tightly Coupled Dipole Array

A planar dual-polarized ultra-wideband array that covers both K and V bands is presented. The architecture relies on tightly coupled dipoles arranged in an egg-crate configuration and a novel capacitive via arrangement that pushes both, the common mode resonance and, the detrimental loop mode resonance, out of the band. To improve the impedance bandwidth and scanning ability, a Marchand balun feed network and a dielectric-based superstrate are respectively used. Infinite array simulations of our array demonstrate a bandwidth of 2.5:1 (24GHz to 60GHz) with VSWR<3 for a maximum scan-angle of +/- 45 degrees for both E- and H-planes.