Title :
Reconfigurable infrared frequency selective surfaces
Author :
Bossard, J.A. ; Werner, D.H. ; Mayer, T.S. ; Drupp, R.P.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
In this paper, a new reconfigurable frequency selective surface (RFSS) design concept is introduced. A grid of simple metallic patches interconnected by a matrix of switches is proposed as the unit cell of an RFSS. The switches are independently addressable and provide significant transmission and reflection flexibility over a large range of frequencies. This flexibility is exploited by optimizing the switch settings using a genetic algorithm (GA) to produce a desired frequency response. The versatility of the design technique is demonstrated by presenting several examples of genetically optimized RFSSs. The first geometry to be considered is a linearly polarized FSS that can be reconfigured for either single-, dual-, or tri-band operation. An RFSS design is also introduced that can be optimized to have a frequency response that is polarization independent in one state (i.e., for one combination of switch settings) and polarization dependent in another state.
Keywords :
frequency response; frequency selective surfaces; genetic algorithms; light polarisation; light reflection; light transmission; periodic structures; switched networks; IR reflection; IR transmission; RFSS; filter response spectra; fixed metallic linear elements; frequency response; frequency selective surfaces; genetic algorithm; independently addressable switches; infrared FSS; interconnected metallic cross-dipole elements; linearly polarized FSS; periodic array; polarization dependence; reconfigurable FSS; Design optimization; Electromagnetic wave polarization; Frequency response; Frequency selective surfaces; Genetic algorithms; Geometry; Periodic structures; Reflection; Switches; Transmission line matrix methods;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1330576