Dang, Q.H.Chen, S.J.Ranasinghe, D.C.Fumeaux, C.2022-01-172022-01-172021IEEE Transactions on Antennas and Propagation, 2021; 69(12):8080-80890018-926X1558-2221https://hdl.handle.net/2440/134102A reconfigurable wearable textile antenna with wide frequency tuning range is demonstrated in this work. Frequency agility is realized by adding a coplanar reconfiguration module to a planar inverted-F antenna (PIFA) constructed in textile technology. The reconfiguration module consists of a small flexible printed circuit board (PCB) which integrates a tuning circuitry with commercial snap-on buttons as electronic-to-textile connectors. Using this module equipped with a varactor diode, the frequency reconfigurability of the PIFA is investigated and optimized parametrically for maximum tuning range, exploiting a smooth transition from a quarter-wave to a half-wave patch resonant mode. A fabricated prototype demonstrates a very wide tuning range of approximately 70% (or one octave) with stable directive radiation characteristics, as predicted by simulations. The robust performance and mechanical stability of the reconfigurable antenna in various on-body and bending configurations validates the viability of the antenna tuning concept and the practicality of the proposed coplanar reconfiguration module.en© 2021 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See https://www.ieee.org/publications/rights/index.html for more information.Flexible antennas; frequency-reconfigurable antennas; planar inverted-F antenna (PIFA); textile antennas; wearable antennasA frequency-reconfigurable wearable textile antenna with one-octave tuning rangeJournal article10.1109/tap.2021.30838262022-01-17576840Dang, Q.H. [0000-0002-5613-6594]Chen, S.J. [0000-0001-7907-2602]Ranasinghe, D.C. [0000-0002-2008-9255]Fumeaux, C. [0000-0001-6831-7213]