Multi-layered Frequency Selective Surfaces for High Frequency Applications

Ertay A. O. , Suer C.

Progress In Electromagnetics Research Symposium 2013, Stockholm, Sweden, 12 - 15 August 2013, pp.183

  • Publication Type: Conference Paper / Summary Text
  • City: Stockholm
  • Country: Sweden
  • Page Numbers: pp.183


Structures involving Frequency Selective Surfaces (FSSs) are popular research topics in several fields such as Radar Cross Section (RCS), electromagnetic absorber and microwave filter design applications. Albeit basic properties of simple structures in the cm-wave region go back as far as 1946 [1], during the last four decades frequency selective surfaces became more and more important as several methods and approaches have been developed for different kind of materials and structures [2]. In the military aircraft industry, stealth technology takes a large place especially for surveillance and detection of threats without being detected itself. Although a large number of studies have been carried out for the structures involving Frequency Selective Surfaces, it is still required to develop multi-band methodologies to avoid multi-frequency scanners. The most difficult thing about Frequency Selective Surfaces is the design and the implementation of the structure that reduces the reflection coefficient — theoretically to zero —. The aim of this paper is to compare the methodologies such as Jerusalem Cross, rectangular or circular slots and combine these specific structures if necessary to create a multiband Frequency Selective Surface that can be used for the applications mentioned above. C and X Bands will be investigated to satisfy the needs of the aircraft usage. The band coverage will be as wide as it can be along with the low thickness of the Frequency Selective Surface proportional to the wavelength λ. Full wave electromagnetics software tools are used to model the proposed structures. Reflection and transmission coefficient values are calculated through desired frequency bands. MATLAB is preferred for calculations of related to required values. Modifications of surfaces with different geometries are applied to the structures via EM design environments and simulation results are presented.