A novel dual-frequency microwave rectifier at 2.45 and 5.8 GHz with harmonic recycling

Wan Jiang, Changjun Liu, Chengyang Yu, Feifei Tan, Xing Chen and Kama Huang

Journal of Electromagnetic Waves and Applications, 2013, vol. 27, issue 6, 707-715

Abstract: A novel dual-frequency microwave rectifier that operates at 2.45 GHz alone, 5.8 GHz alone, or their combination has been developed in this paper. It is the first approach to microwave rectifying for a situation of the incoherent microwave power combination. We focused on the two primary components, i.e. the regulation of impedance matching and the recycling of the second harmonics. A quarter-wave short-ended microstrip line at 5.8 GHz is shunted at the input of the rectifier to enhance the impedance matching at 2.45 GHz. A microstrip line band-stop filter (BSF) and a quarter-wave short-ended microstrip line are introduced to improve the recycling of the second harmonics. The measured microwave to DC (MW-DC) conversion efficiencies are 57.5, 46.5, and 40.7% at 2.45, 5.8 GHz, and their combination, respectively, with an input microwave power at 17 dBm. It may be applied to a dual-frequency microwave power wireless transmission system.

Date: 2013
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DOI: 10.1080/09205071.2013.763589

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