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This paper explores the potential of using vias for the miniaturization of frequency selective surfaces (FSSs). A new concept of knitting the loop-type FSS elements in 2.5-D is proposed, where successive segments of the loop are placed alternately on the two surfaces of the substrate and then interconnected through vias. A 2.5-D square-loop FSS (2.5-D SL-FSS) based on the proposed method is designed...
This paper presents a design of band-pass shielding enclosure for two frequency bands of WLAN. The proposed design employs a compact frequency selective surface to highlight the advantages of these miniaturized structures for the selective shielding of such enclosures that are electrically small. The results indicate that the proposed shielding enclosure has high transmittance in both the pass bands...
A novel third-order band-pass frequency selective surface (FSS) is proposed in this paper. This FSS has a good filtering performance at 16–18GHz in the terms of band-pass flatness and steep-cutoff characteristic by using multi-layer surfaces cascade coupling each other. The FSS is comprised by three patch surfaces and two aperture surfaces with the total thickness of only 2mm (1/9 λ) and has a −1dB...
A novel modified-design of Hilbert curve is presented, which has stable frequency response for both TE and TM polarizations. Furthermore, a frequency selective surface (FSS) based on this modified-Hilbert curve is proposed for shielding against dual-band WLAN. It has an insertion loss of more than 15 dB with the bandwidths of 220 MHz at 2.45 GHz and 160 MHz at 5.78 GHz. The proposed FSS provides an...
The transmission-line modeling (TLM) numerical method is employed to investigate the high-frequency shielding effectiveness (SE) of a metallic enclosure with unconventional aperture geometries. Analytical methods can predict SE but they have two main limitations: one is they can predict the SE of enclosure with very simple aperture shapes and second is that results cannot be predicted with accuracy...
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