Design of Frequency Selective Band Stop Shield Using Analytical Method

Abstract

In this article, a high-order frequency selective bandstop EMC (electromagnetic compatibility) shield is designed using multilayer square loop while each loop resonates at the specific desired frequency. The glass material is picked out as the preferred substrate for the designing process. In contrast to the computationally intensive numerical approaches (software), the equivalent circuit model offers a simple alternative method in FSS (frequency selective surface) analyses which is useful for quickly predicting the performance of FSS. The proposed FSS can be synthesized based on microwave filter theory and the synthesized FSS can control transmission-zero frequencies. A three zero-transmission transparent window is designed using the proposed method, in which 30dB insertion loss is achieved for 6 to 10 GHz bandwidth and optical opacity of the structure is 85%. The response of the analytical model is compared with the results of full-wave simulation. As a result, it predicts quite well the resonant frequencies of the designed FSS.

Analytical Method for Designing FSS-Backed Reflectarray Antenna Using Transmission Line Approach

“…In figure 2.f η 0 and η d are the free space and the substrate impedances, respectively. The impedance of lower FSS layer, z 1 , the impedance of upper FSS layer, z 2 , and the reflective element impedance, z d , are described by following equations [12][13].…”

“…The ADS S parameters are achieved by the technique mentioned in [12]. These curves are drawn for the parameters mentioned above and ld k =2.5mm and θ s =0 (normal incidence).…”

Parametric studies on hexagonal ring based aperture and patch type curved frequency selective surface

“…10 A Sharp roll off was observed due to SIW cavity for normal incidence using CST simulator at the resonant frequency of 12.18 GHz. 10 In the article, 11 the bandwidth achieved was about 4 GHz with 30 dB insertion loss for a band stop filter with multilayer square loop by applying equivalent circuit model only. There was no validation with experimental setup.…”

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

“…Meanwhile, other signals are free to transfer, for example, visible light, Tera Hertz, satellite, cell phone, global positioning system, television, radio, and walkie‐talkie. FSSs are the advanced EM structures for controlling wave scattering through the EM computations as the equivalent electric circuit model . FSS has fascinating applications in shielding, bioelectromagnetic issues, and vehicular telecommunications .…”

“…FSSs are the advanced EM structures for controlling wave scattering through the EM computations as the equivalent electric circuit model. 2 FSS has fascinating applications in shielding, 3 bioelectromagnetic issues, 4 and vehicular telecommunications. 5 Microwave behavior of a transparent band-stop window consists of cascaded surfaces made with transparent thin-film indium tin oxide (ITO) has been investigated in Reference 6.…”