Circularly Polarized Implantable Antenna for 915 MHz ISM-Band Far-Field Wireless Power Transmission

Circularly Polarized Implantable Antenna for 915 MHz ISM-Band Far-Field Wireless Power Transmission

A wireless power link with circular polarization is studied in this letter for far-field wireless power transmission. First, a miniaturized circularly polarized (CP) implantable antenna is designed at 915 ISM band. The proposed antenna features a good miniaturization with the dimensions of 11 × 11 ×...

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Veröffentlicht in:IEEE antennas and wireless propagation letters 2018-03, Vol.17 (3), p.373-376
Hauptverfasser: Liu, Changrong, Zhang, Yudi, Liu, Xueguan
Format: Artikel
Sprache:eng
Schlagworte:
Antenna measurements
Bandwidth
Biomedical applications
Dipole antennas
far-field RF powering
implantable antenna
Polarization
Rectifiers
Skin
wireless power transfer (WPT)
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Zusammenfassung:A wireless power link with circular polarization is studied in this letter for far-field wireless power transmission. First, a miniaturized circularly polarized (CP) implantable antenna is designed at 915 ISM band. The proposed antenna features a good miniaturization with the dimensions of 11 × 11 × 1.27 mm 3 by employing the stub loading and capacitive coupling among the stubs. It has the smallest size and maintains good radiation performance, compared with previous CP implantable antennas. The simulated impedance bandwidth covers from 889 to 924 MHz for |S 11 | less than -10 dB, and the axial-ratio (AR) bandwidth (AR
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2790418