Frequency selective surfaces with lumped and time-varying loads, variable surface impedance, and multiple screens

Current numerical methods for the spectral domain analysis of thin, planar periodic structures can be applied to a limited class of surface geometries. Since the frequency response of a periodic structure is dependent upon the geometry of the surface, a typical approach to changing the response is to modify the geometry. In the past this meant choosing the element shape, such as a square path or cross, and adjusting the dimensions to give the proper resonant frequencies. This thesis adds the additional control parameters of variable surface impedance, lumped loading, nonlinear lumped loads, and multiple layers which are capable of generating entirely new response curves. This thesis, therefore, expands the realizable frequency responses of periodic structures and the ability to design and produce desired response characteristics.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Mittra, Raj

• Engineering, Electronics and Electrical

Statement dc:rights

• Copyright 1990 Epp, Larry W.

Language dc:language

eng

Identifier

AAI9026177
(UMI)AAI9026177

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20563