Full-duplex enabled wireless power transfer system via textile for miniaturized IMD

Jaeho Lee; Beomjun Bae; Beomjin Kim; Byunghun Lee

doi:10.1007/s13534-022-00237-9

Full-duplex enabled wireless power transfer system via textile for miniaturized IMD

Biomed Eng Lett. 2022 Jul 17;12(3):295-302. doi: 10.1007/s13534-022-00237-9. eCollection 2022 Aug.

Authors

Jaeho Lee¹, Beomjun Bae², Beomjin Kim², Byunghun Lee^{1

2}

Affiliations

¹ Department of Electronic Engineering, Hanyang University, Seoul, 04763 South Korea.
² Department of Biomedical Engineering, Hanyang University, Seoul, 04763 South Korea.

Abstract

Full-duplex (FD) enabled wireless power transfer (WPT) system via textile for miniaturized IMD is presented. By utilizing the battery-free near-field communication (NFC) method, the system realizes wireless power and data transmission without a bulky battery or energy harvester which can diminish the physical size of implantable medical device (IMD). Moreover, using textile as a medium of power transmission, the system overcomes the drawback and extends the limited effective range of the NFC method. In addition, as realizing simultaneous bidirectional data transmission over a single data channel, IMD has been further miniaturized. The proposed system including an external transmitter and the minimized IMD receiver supports 200 kbps and 50 kbps data rates for FSK downlink and LSK uplink telemetries at the same time with bit error rate (BER) of < $8 \times 10^{- 5}$ and < $4 \times 10^{- 5}$ , respectively. The measured power transfer efficiency (PTE) and DC-to-DC power delivered to load (PDL) are 5.77% and 64 mW at 0.5/60 cm of vertical/horizontal distance.

Keywords: Conductive thread; Data telemetry; Dual-band; Full duplex; Implantable medical device; Near-field-communication method; Radio frequency technology; Textile coil; Wireless power transfer.