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Design and Characterization of Periodically Conductive Woven Fabric

Guan Fuwang, Li Zhaole, Yang Zhuli, Zhang Chuyang, Qiu Yiping

Autex Research Journal

2019

Vol. 19, no. 3

236--242

In this paper, a novel kind of electromagnetic (EM) functional textiles is proposed, which show high-pass characteristics as they interact with EM waves. The periodically conductive woven fabric was designed, fabricated, and measured. Specifically, by means of unit cell model building and EM simulation, the theoretical S21 (transmission coefficient) and S11 (reflection coefficient) curves were obtained. A concrete sample was fabricated through weaving process, and its transmission characteristics were measured in the microwave anechoic chamber. The measured and simulated results were highly consistent, demonstrating the validity of design process. Compared with the aluminum foil paper sample, the S21 values of fabricated sample were a little smaller, and the reason could be attributed to yarn crimp and surface roughness. The EM characteristics of fabricated sample under two different polarization modes were slightly different, which was due to the beating-up tension of weaving process. The work could offer new research ideas, and the related products have potential advantages over rigid plates on the account of textile characteristics.

Selektywna polaryzacyjnie i częstotliwościowo płyta strefowa Fresnela

Brenner M., Bajurko P.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2018

nr 6

238--241, CD

Poniższa praca prezentuje projekt i analizę właściwości selektywnej polaryzacyjnie i częstotliwościowo płytki strefowej Fresnela, w której zastosowano filtr powierzchniowy w postaci periodycznej struktury złożonej z dipoli. Wyniki zestawiono z wynikami dla konwencjonalnej płytki strefowej.

The following paper presents design and analysis of polarization and frequency selective Fresnel zone plate comprising frequency selective surface composed of periodic structure based on dipole element. The results are compared with the ones for conventional zone plate.

Improvement of Microwave Absorbance of Polymer Composites of W-Type Hexaferrite Powders by Attachment of Frequency Selective Surface

Cho H.-S., Kim S.-S.

Archives of Metallurgy and Materials

2017

Vol. 62, iss. 2B

1325--1328

This work investigates the effect of a frequency selective surface (FSS) composed of a regular array of square loop elements on the absorption properties of grounded ferrite composites. Polymer matrix composites of CoZnW hexaferrite powders having small magnetic loss were used as the substrate material. Computational tools were used to model the interaction between electromagnetic waves and materials and determine the reflection coefficient. Reflection loss and bandwidth were greatly improved by attaching an FSS with controlled electrical resistance (R) onto the grounded ferrite composites. For the FSS with R = 800 Ω, the minimum reflection loss decreased to –25 dB at 10 GHz and the bandwidth was broadened to 7.5-12.5 GHz with respect to –10 dB reflection loss.