Dual-resonance ultra-miniaturised textile antenna for ISM/wearable applications

ABSTRACT

In this paper, an ultra-miniaturised textile antenna is designed and developed for 2.45/5.8 GHz industrial, scientific and medical (ISM) band applications. The proposed microstrip line-fed dual-band antenna consists of non-conducting (Felt) and conducting (Sheildit Super) textile materials. The size of the antenna is 20 mm×30 mm×1 mm, and its (S₁₁≤–10) bandwidths in the lower and upper resonant bands are 14.2% and 27.5%, respectively. In addition, various fabrics are considered and characterised in order to investigate different possibilities for textile antennas. The proposed antenna configuration is simple, compact, easy to manufacture, and efficient for wearable/textile applications. The proposed textile antenna performance is studied for on-body situations using the three-layered human shoulder model and four-layered human arm model. The antenna offers consistent on-body performance even when subjected to deformations caused by bending.

KEYWORDS:

• Antenna
• compact
• SAR
• textile
• wearable

Acknowledgments

The authors would like to thank Dr. Satya Kesh Dubey and Mr. Asheesh Kumar Sharma of the National Physical Laboratory, New Delhi, India, for measuring the dielectric properties of textile samples.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Science and Engineering Research Board (SERB) under Visiting Advance Joint Research (VAJRA) Scheme, Govt. of India [Grant No. VJR/2019/000009], 22 July 2020.