A 2.45 GHZ high efficiency CMOS RF energy harvester with adaptive path control

Danial Khan, Muhammad Basim, Khuram Shehzad, Qurat Ul Ain, Deeksha Verma, Muhammad Asif, Seong Jin Oh, Young Gun Pu, Sang Sun Yoo, Keum Cheol Hwang, Youngoo Yang, Kang Yoon Lee

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12 Scopus citations


In this research work, a reconfigurable 2.45-GHz RF-DC converter realized in a 180-nm complementary metal-oxide semiconductor (CMOS) technology is proposed to efficiently harvest electromagnetic energy. The proposed circuit is composed of a low-power path rectifier, a high-power path rectifier, and an adaptive path control (APC) circuit. The APC circuit is made-up of a comparator, two switches, and an inverter. The APC circuit senses the output voltages of the low-power path and the high-power path rectifiers and generates a control signal to automatically switch the proposed circuit between the lower-power path and the high-power path operation depending upon RF input power level. The proposed circuit obtains more than 20% measured power conversion efficiency (PCE) from −6 dBm to 11 dBm input power range with maximum efficiencies of 41% and 45% at 1 and 6 dBm input powers, respectively, for 5 kΩ load resistance. In addition, the proposed circuit shows excellent performance at 900 MHz and 5.8 GHz frequencies.
Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalElectronics (Switzerland)
Issue number7
StatePublished - Jul 1 2020
Externally publishedYes

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Generated from Scopus record by KAUST IRTS on 2023-09-23


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