Experimental results of a multifrequency array antenna

An array antenna containing three arrays of interlaced radiating elements with operating frequencies in
L, S
, and
C
bands are described. Measured results include radiation patterns, crosspolarization data, gain, impedance, and mutual coupling measurements. The interlacing of elements of different arrays into a single aperture is shown to be feasible. Mutual interaction between arrays can be significant, but can be reduced by cross polarization between arrays.