Design of an all-textile circular patch antenna with corrugated ground for guided wave along the body surface for WBAN applications

Jinpil Tak, Seoungkyu Lee and Jaehoon Choi

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 7, 905-924

Abstract: An all-textile circular patch antenna with corrugated ground for guided wave along the body surface is proposed. The proposed antenna consists of center-coupled-fed circular patch and thread-corrugated ground. The thread-corrugated ground, made of conductive sewing threads, acts as an inductively reactive surface to support a body surface TM mode wave. The proposed antenna with a thickness of 7 mm (0.14λ0 at 6 GHz) operates in the 6-GHz band. Considering a practical on-body application, the proposed antenna is fabricated using all-textile materials, such as conductive fabric, conductive threads, fabric substrate, and conductive epoxy. To evaluate the human body effect, a two-thirds muscle-equivalent semi-solid phantom is utilized. The measured 10-dB return loss bandwidth of the antenna on the phantom is 9.5%, which ranges from 5.77 to 6.34 GHz. The gain enhancement on the phantom surface (θ = 90°) is 8.65 dB from –8.1 dBi for the antenna without a corrugated ground to 0.55 dBi for the antenna with a thread-corrugated ground.

Date: 2015
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DOI: 10.1080/09205071.2015.1026408

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