A Novel Manufacturing Process for Compact, Low-Weight and Flexible Ultra-Wideband Cavity Backed Textile Antennas
| Autor: | Sam Lemey, Dries Van Baelen, Hendrik Rogier, Jo Verhaevert |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
integrated waveguide (SIW)
Materials science Fabrication Acoustics Ultra-wideband Physics::Optics substrate 02 engineering and technology 01 natural sciences lcsh:Technology flexible electronics Article Radiation pattern ultra-wideband (UWB) substrate integrated waveguide (SIW) 0202 electrical engineering electronic engineering information engineering Figure of merit General Materials Science lcsh:Microscopy lcsh:QC120-168.85 Computer Science::Information Theory lcsh:QH201-278.5 lcsh:T electronics 010401 analytical chemistry wearable antennas textile antennas Internet of Things (IoT) body centric communication 020206 networking & telecommunications Flexible electronics 0104 chemical sciences Antenna efficiency lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering flexible Antenna (radio) lcsh:Engineering (General). Civil engineering (General) Cavity wall lcsh:TK1-9971 |
| Zdroj: | Materials Materials, Vol 11, Iss 1, p 67 (2018) Materials; Volume 11; Issue 1; Pages: 67 MATERIALS |
| ISSN: | 1996-1944 |
| Popis: | A novel manufacturing procedure for the fabrication of ultra-wideband cavity-backed substrate integrated waveguide antennas on textile substrates is proposed. The antenna cavity is constructed using a single laser-cut electrotextile patch, which is folded around the substrate. Electrotextile slabs protruding from the laser-cut patch are then vertically folded and glued to form the antenna cavity instead of rigid metal tubelets to implement the vertical cavity walls. This approach drastically improves mechanical flexibility, decreases the antenna weight to slightly more than 1 g and significantly reduces alignment errors. As a proof of concept, a cavity-backed substrate integrated waveguide antenna is designed and realized for ultra-wideband operation in the [5.15-5.85] GHz band. Antenna performance is validated in free space as well as in two on body measurement scenarios. Furthermore, the antenna's figures of merit are characterized when the prototype is bent at different curvature radii, as commonly encountered during deployment on the human body. Also the effect of humidity content on antenna performance is studied. In all scenarios, the realized antenna covers the entire operating frequency band, meanwhile retaining a stable radiation pattern with a broadside gain above 5 dBi, and a radiation efficiency of at least 70%. |
| Databáze: | OpenAIRE |
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