Interwoven convoluted element frequency selective surfaces with wide bandwidths

Abstract

The interweaving of adjacent convoluted elements of crossed dipoles is shown to give reductions in operating frequencies of almost 15 times for single layer surfaces. The frequency stability with oblique incidence is observed to be significantly better than for simple crossed dipoles. At normal incidence the fractional reflection bandwidth increases to more than 60% and the common bandwidth for oblique incidence up to 45° is 46%.