Textile Multilayer Cavity Slot Monopole for UHF Applications

TitleTextile Multilayer Cavity Slot Monopole for UHF Applications
Publication TypeJournal Article
Year of Publication2017
AuthorsPinapati, S. Pramod, D. C. Ranasinghe, and C. Fumeaux
JournalIEEE Antennas and Wireless Propagation Letters
Date Published2017
KeywordsBroad-slot, UHF antennas, embroidery, slot monopole, wearable antennas

A low-profile multilayer textile antenna inspired by a folded cavity with a broad slot monopole is presented for wearable applications in the UHF band. The proposed geometry has total dimensions of 0.34λ 0 × 0.22λ 0 × 0.0149λ 0 at a targeted resonance frequency of 923 MHz and achieves a fractional bandwidth of 3.0% on-body. The antenna is fed by a flexible shielded stripline to enhance wearability, and a substantial overall size reduction is achieved through a combination of miniaturization techniques amenable for textile implementation. A systematic design procedure along with a simple fabrication process including the use of computerized embroidery is a salient feature of the proposed geometry. Good agreement between simulation and measurement results in various conditions validates the proposed structure.