Design, fabrication, and measurement of frequency-selective surfaces

This paper describes theoretical analysis, fabrication techniques, and meas urement results for frequency-selective surfaces operating in the millimete r and submillimeter wave region. The analysis is based on the method of mom ents with entire domain basis functions, obtained by the boundary-integral- resonant-mode-expansion method. This method is particularly efficient and a pplies to the analysis of thick metal screens perforated periodically with arbitrarily shaped apertures. Three fabrication techniques are discussed an d applied: photolithographic etching, galvanizing growth, and milling. Prot otypes obtained with the different fabrication techniques are presented. Fi nally, measurements of the frequency response of the prototypes are present ed, based on a new spectroscopic tool called terahertz time-domain spectros copy. In all cases, the measurement data fit very well with the simulations . (C) 2000 Society of Photo-Optical Instrumentation Engineers. [S0091-3286( 00)03308-0].