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Dual-Band Bent Sensing Textile Antenna Under Dual-Mode Resonance
Zi-Qiang Liu1, Nuo Chen1, Ke Ma1
1Jiangsu Key Laboratory of Wireless Communications and Internet-of-Things, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
None:
This article presents the design of a dual-mode resonant, dual-band textile microstrip patch antenna for bent sensing applications. The antenna has a simple, slit-perturbed circular sector patch configuration. Unlike traditional single-mode resonant bending sensor antennas, dual-mode resonance brings a unique dual-band sensing characteristic to textile antennas. It effectively covers 2.45 GHz and 5.8 GHz Industrial, Scientific and Medical (ISM) frequency bands. Experimental results demonstrate that the proposed antenna achieves -10 dB impedance bandwidths of 1.4% (2.43-2.465 GHz) and 2.4% (5.775-5.915 GHz), with maximum peak gains of 8.8 dBi and 9.1 dBi, respectively. As experimentally validated on flannel substrates, the antenna achieves maximum bent sensing sensitivities of 1.1 MHz/mm and 1.78 MHz/mm at 2.45 GHz and 5.8 GHz bands, respectively. Furthermore, the antenna is able to provide stable E-plane broadside radiation patterns in bending situations. It would be an ideal candidate for radio frequency identification (RFID), health monitoring systems, and flexible communication applications.
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