A Low-Cost 2.45/5.8 GHz ISM-band Rectifier for Embedded Low-Power Systems in Metallic Objects

Konferenz: GeMIC 2008 - German Microwave Conference
10.03.2008 - 12.03.2008 in Hamburg-Harburg, Germany

Tagungsband: GeMIC 2008

Seiten: 4Sprache: EnglischTyp: PDF

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Kaldjob, E. B.; Geck, B. (Institute of Radiofrequency and Microwave Engineering, Leibniz Universität Hannover, Appelstraße 9A, 30167 Hanover, Germany)

A discrete low-cost microwave voltage doubler/full way rectifier operating in the 2.45 and 5.8 GHz ISM bands will be presented. The rectifier is mounted on planar waveguide-toplanar transitions to supply wireless passive short-range systems like transponders and sensors embedded in metallic objects. Antenna requirements analysis, simulations of rectifier performances in consideration of computed antenna properties as well as measurement results of rectifiers integrated in metallic objects will be presented. The realized rectifiers achieve RF-to- DC conversion efficiencies closed to 25% in both 2.45 and 5.8 GHz ISM bands.