Design of a Compact Dual-Polarized Wearable Antenna With Spatial Diversity Reception for Into-Body Communications

Han Wang, Lei Zhu, Yuan Feng*, Yong-Xin Guo

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

4 Citations (Scopus)

Abstract

In this article, a novel compact dual-polarized wearable antenna is proposed for into-body bio-telemetric applications. Dual-polarization is realized using a meandered rectangular loop and an open-ended slot, which are both designed on a flexible printed circuit board (FPCB). The inner patch with an open-ended slot not only serves as a capacitive loading for the adjacent loop but also generates a new orthogonal radiation by properly adjusting the structure of the modified T-shaped open slot. The simulated wearable antenna maintains wide −10-dB impedance bandwidths of 2.26-2.78 GHz (21.22%) for the rectangular loop element and 2.20-2.71 GHz (20.82%) for the open-ended slot element, with in-band port isolation of more than 25 dB. Moreover, for evaluating the into-body communication link with both polarization and spatial diversities, a proof-of-concept design of the linearly polarized in-body antenna is also reported with varied positions and orientations inside the homogeneous phantom. And a comprehensive link measurement is conducted by adopting multiple proposed wearable antennas which tightly attach to the phantom surface with specific separation distances. The measured results indicate a peak transmission performance of 38.9 dB with a 60-mm implant depth. And the dual-polarized and spatial configurations of the wearable antennas also enable the synthesis of the into-body communication link to mitigate the uncertain positions and rotations of the in-body antenna in practical scenarios. © 2023 IEEE.
Original languageEnglish
Pages (from-to)7911-7923
JournalIEEE Transactions on Antennas and Propagation
Volume71
Issue number10
Online published11 Aug 2023
DOIs
Publication statusPublished - Oct 2023
Externally publishedYes

Research Keywords

  • Dual-polarized
  • into-body communications
  • spatial diversity
  • wearable antennas

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