Broad Dual-Band Rectifier With Wide Input Power Ranges for Wireless Power Transfer and Energy Harvesting
Daju Lee, Juntaek Oh
Abstract
This letter presents a broad dual-band rectifier with a wide input power range that employs a dual-band matched voltage doubler (DMVD). The DMVD is composed of a voltage doubler and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$L$ </tex-math></inline-formula> -type matching networks connected with each diode; it transforms the input reactance of each diode independently over wide input power and broad dual-band ranges, thereby widening the dynamic input power range. The proposed rectifier was implemented with the dimensions of 40 mm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times15$ </tex-math></inline-formula> mm. Measurements reveal that the power conversion efficiency (PCE) was maintained at over 50% in the wide input power ranges of 10.3–32 dBm and 13.5–31.5 dBm at 0.915 and 2.45 GHz, respectively. PCEs exceeding 50% were measured over frequency ranges of 0.3–1.1 GHz and 1.5–2.6 GHz.