Three-Port Harmonic-Rejecting SWIPT Front-End for Smart Healthcare Sensor Network
Authors: Odiamenhi, M., He, Z., See, C.H., Parchin, N.O., Goh, K. and Yu, H.
Journal: Icac 2025 30th International Conference on Automation and Computing
DOI: 10.1109/ICAC65379.2025.11196613
Abstract:A compact, low-profile microstrip patch antenna is presented for Simultaneous Wireless Information and Power Transfer (SWIPT) in medical Internet of Things (IoT) applications. The design features a double quarter-wave resonator and capacitive feed structure, enabling tri-polarisation agility and robust angular tolerance to body-induced misalignments. Intrinsic impedance matching via capacitive excitation allows direct rectifier integration without external matching networks. Harmonic suppression is achieved using centred shorting vias and slot-loaded topology, rejecting spurious modes up to 8 GHz with >20dB attenuation. The co-designed antenna-rectifier system achieves 56.5% RF-to-DC efficiency at -10 dBm input, >22 dB port isolation, and a peak gain of 4.2dBi, all within a compact 0.45λ0 × 0.39λ0 × 0.39 λ0 footprint. This work offers a spectrally clean, miniaturised solution for safe, efficient SWIPT operation in conformal healthcare sensors.
Source: Scopus