Study on frequency selective surfaces with square loop slots

To meet the need of curved FSS radome design, the theoretical and experimental investigations have been made on frequency selective surfaces with square loop slots. Expressions of basis function and transmission coefficient T are given. Factors are discussed which affect significantly the transmission characteristics. The measured T is greater than −0.51dB for normal incidence and T is greater than −1.0dB at oblique incidence of 60°. The measured results are quite satisfactory.