An Improved Model for Full Wave Analysis of Multilayered Frequency Selective Surface with Gridded Square Element

Abstract

Analysis of frequency selective surface with gridded square element using accurate integral equation technique is considered in this paper. An improved subsectional current approximation model is proposed. Two more terms of basis function, the downward half triangle (DHT) term and the upward half triangle (UHT) term, besides the commonly adopted rooftop function, are included to expand the induced current. The additional terms are used to account for the effect of the induced currents at the corners of the outer square of the unit cell. Green's functions are derived by using spectral domain immittance approach and the incident fields are derived by using the z-directed potential. The computed results are in good agreement with the measured results.

Frequency Selective Surfaces With Fractal Four Legged Elements

“…This property has been shown effective in reducing the spacing between resonant elements in an FSS [9] and in reducing the volume occupied by small antennas [11]. And by exploiting the self-similarity property of fractals, multiband and wideband behaviors can be achieved in both FSS [6,14] and antenna [12,13] applications.…”

“…Frequency selective surfaces, which are used widely as microwave absorbers [1] and filters [2], have been extensively investigated over the years [3][4][5][6][7][8]. In many communication situations, multiband FSSs are required.…”

Design of Novel Reconfigurable Frequency Selective Surfaces With Two Control Techniques

“…In most of the FSS applications, the geometry and material parameters have been designed to produce a static frequency response. However, several groups have investigated the possibility of tuning or reconfiguring an FSS so that its frequency response can be shifted or altered while in operation [2][3][4][5][6][7]. This can be accomplished either by changing the electromagnetic properties of the FSS substrate, or by altering the geometry of the structure, or by introducing circuit elements into the FSS screen that vary the current flow between metallic patches.…”

A Novel Dualband Frequency Selective Surface With Periodic Cell Perturbation

“…In the near-infrared and visible portions of the spectrum, periodic screens have been proposed as solar selective surfaces to aid in the collection of solar energy [2]. Many of element shapes such as jerusalem cross and methods are proposed in other papers [3][4][5][6][7][8][9][10][11][12].…”