TY - JOUR
T1 - Design of a Compact Dual-Polarized Wearable Antenna With Spatial Diversity Reception for Into-Body Communications
AU - Wang, Han
AU - Zhu, Lei
AU - Feng, Yuan
AU - Guo, Yong-Xin
PY - 2023/10
Y1 - 2023/10
N2 - 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.
AB - 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.
KW - Dual-polarized
KW - into-body communications
KW - spatial diversity
KW - wearable antennas
UR - http://www.scopus.com/inward/record.url?scp=85167839302&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85167839302&origin=recordpage
U2 - 10.1109/TAP.2023.3303032
DO - 10.1109/TAP.2023.3303032
M3 - RGC 21 - Publication in refereed journal
SN - 0018-926X
VL - 71
SP - 7911
EP - 7923
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 10
ER -