A Compact Dual-Mode Pattern-Reconfigurable Wearable Antenna for the 2.4-GHz WBAN Application

Guo Ping Gao, Ben Kai Zhang, Jing Hang Dong, Zhi Heng Dou, Zhuo Qi Yu, Bin Hu*

*Corresponding author for this work

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Abstract

In this communication, a novel reconfigurable antenna operating at both ON- and OFF-body mode is proposed. Initially, the study is dedicated to the construction of omnidirectional and unidirectional radiation using the fundamental TM00 and TM10 mode of the rectangular patch. Then, a rectangular slot is cut out of the patch to shift the resonance of the unidirectional mode to a lower frequency, which not only minimizes the antenna's overall size but also enables the omnidirectional and unidirectional modes to have overlapping impedance bandwidths. In order to switch arbitrarily, four p-i-n diodes are mounted to control the operating mode. The measured results show that the overlapped bandwidth achieves 3.8% and could cover the 2.4-GHz ISM band. Besides, stable performance of the antenna is obtained when setting on different parts of the human body. The calculated specific absorption rate (SAR) values of both ON- and OFF-body mode meet the standards of the United States and Europe. These properties make the proposed antenna suitable for wearable systems.

Original languageEnglish
Pages (from-to)1901-1906
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume71
Issue number2
DOIs
Publication statusPublished - 1 Feb 2023
Externally publishedYes

Keywords

  • ON-/OFF-body communication
  • p-i-n diode
  • polydimethylsiloxane (PDMS)
  • reconfigurable antenna
  • wearable antenna
  • wireless body area network (WBAN)

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Gao, G. P., Zhang, B. K., Dong, J. H., Dou, Z. H., Yu, Z. Q., & Hu, B. (2023). A Compact Dual-Mode Pattern-Reconfigurable Wearable Antenna for the 2.4-GHz WBAN Application. IEEE Transactions on Antennas and Propagation, 71(2), 1901-1906. https://doi.org/10.1109/TAP.2022.3225529