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An efficient technique for analyzing multiple frequency‐selective‐surface screens with dissimilar periods
Author(s) -
Prakash V. V. S.,
Mittra Raj
Publication year - 2002
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10506
Subject(s) - microwave , transverse plane , selective surface , plane wave , matrix (chemical analysis) , reflection (computer programming) , scattering , electronic engineering , set (abstract data type) , computer science , acoustics , engineering , optics , physics , materials science , telecommunications , structural engineering , composite material , programming language
This Letter presents an efficient technique for analyzing multiple frequency‐selective surfaces (FSSs) with noncommensurate periodicities based on the discrete plane‐wave spectrum (DPWS) expansion method. In this method, the tangential electric fields at the interfaces of the screens are first expanded in a set of transverse electric and transverse magnetic waves, and the responses of the individual FSS screens are derived for each of these waves. The transmission and reflection characteristics of the composite structure are then computed in an iterative manner, circumventing the need for matrix inversions, which can be extremely expensive in terms of CPU time and memory for noncommensurate FSSs. Representative numerical examples are presented to illustrate the computational advantage gained by using the proposed approach as opposed to the conventional generalized scattering matrix technique. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 23–27, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10506