TY - JOUR
T1 - A Compact Textile Penta-Band Wearable Antenna Using Multimode Patch and Multiresonant Feeding for Off-Body Communications
AU - Xu, Ziang
AU - Gao, Xiang
AU - Tang, Wenfei
AU - Guo, Kun
AU - Bu, Xiangyuan
AU - An, Jianping
N1 - Publisher Copyright:
© 2026 IEEE.
PY - 2026/4/1
Y1 - 2026/4/1
N2 - This letter presents a compact textile penta-band wearable antenna for off-body communications. To resolve the challenge of implementing multiband operation with consistent polarization within a limited volume, the proposed antenna design combines the techniques of multimode resonant patch and multiresonant feeding. The upper radiating patch integrates a modified U-slot for enabling tri-band multimode resonance, while the middle-layer T-shaped feeding structure is loaded with two shorting pins and a notched square ring thus contributing two additional resonant bands via mode splitting. The antenna achieves a measured fractional operating bandwidth of 2.0%, 5.9%, 5.3%, 3.1% and 2.0% at 1.13 GHz, 1.62 GHz, 2.06 GHz, 2.62 GHz, and 2.88 GHz with |S11| < -10 dB, respectively. Far-field measurement results confirm identical polarization modes and stable broadside radiation patterns across all bands. On-body evaluations reveal that the specific absorption rate values are below 0.4 W/kg with the input power of 1 W, complying well with the safety limit. This antenna shall be very attractive for off-body communications.
AB - This letter presents a compact textile penta-band wearable antenna for off-body communications. To resolve the challenge of implementing multiband operation with consistent polarization within a limited volume, the proposed antenna design combines the techniques of multimode resonant patch and multiresonant feeding. The upper radiating patch integrates a modified U-slot for enabling tri-band multimode resonance, while the middle-layer T-shaped feeding structure is loaded with two shorting pins and a notched square ring thus contributing two additional resonant bands via mode splitting. The antenna achieves a measured fractional operating bandwidth of 2.0%, 5.9%, 5.3%, 3.1% and 2.0% at 1.13 GHz, 1.62 GHz, 2.06 GHz, 2.62 GHz, and 2.88 GHz with |S11| < -10 dB, respectively. Far-field measurement results confirm identical polarization modes and stable broadside radiation patterns across all bands. On-body evaluations reveal that the specific absorption rate values are below 0.4 W/kg with the input power of 1 W, complying well with the safety limit. This antenna shall be very attractive for off-body communications.
KW - Multiband antenna
KW - multimode patch
KW - multiresonant feeding
KW - off-body communication
KW - textile wearable antenna
UR - https://www.scopus.com/pages/publications/105031055486
U2 - 10.1109/LAWP.2026.3665513
DO - 10.1109/LAWP.2026.3665513
M3 - Article
AN - SCOPUS:105031055486
SN - 1536-1225
VL - 25
SP - 1822
EP - 1826
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
IS - 4
ER -