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Low-profile circularly polarized rectifying antenna for wireless power transmission at 5.8 GHz

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2 Author(s)
J. Heikkinen ; Inst. of Electron., Tampere Univ. of Technol., Finland ; M. Kivikoski

Portable devices operating without batteries are sometimes desired in wireless applications such as RFID (Radio Frequency Identification) and telemetry. A novel circularly polarized shorted annular ring-slot rectenna (rectifying antenna) on a 0.5 mm thick flexible microwave laminate is proposed for the powering of these devices. Output dc voltage of 1.3 V and axial ratio of 1.5 dB were measured when 32 dBm microwave power was transmitted at 5.8 GHz over a distance of 2 m. Comparing the results with a rectenna designed on a thick rigid laminate, similar performance was observed.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:14 ,  Issue: 4 )