Low Profile Array With Integrated High Impedance Surfaces For High Performance Adaptive Gnss

A compact and low profile array with integrated high impedance surfaces ( HIS) is proposed in this paper. The array is comprised of 4 radiating cavities spaced 0.6 wavelength apart (center to center) and filled with dielectric material and two stacked patches. The HIS, which is made of a cavity and a FSS layer, is integrated between the radiating elements and minimizes the inter-element coupling. The presence of the HIS provides inter-element coupling levels below -30 dB. The coupling levels are -16 dB without HIS. The low inter-element coupling and low profile features of the antenna make the array an attractive solution for anti-jam adaptive GNSS applications.