Millimeter wave transmittance and diffractive scattering of radome membranes

The study of electromagnetic properties of a number of woven and non-woven radome membranes with various diameter of threads of the fabric, and thickness of the laminate was made as a continuous function of frequency over the range 30-1000 GHz by utilizing Fourier transform spectroscopy. These woven and non-woven radome membranes were manufactured by W. L. Gore and Associates and known as "Gore-Tex". It is for the first time the transmittance has been measured with various angles of incidence of the incident wave for both TE and TM modes. Strong diffractive scattering has been found above the frequency with wavelength comparable with period of the fabrics (240 GHz for the standard Gore-Tex product).