A -20 to 30 dBm Input Power Range Wireless Power System With a MPPT-Based Reconfigurable 48% Efficient RF Energy Harvester and 82% Efficient A4WP Wireless Power Receiver With Open-Loop Delay Compensation

Kim, Sang-Yun; Abbasizadeh, Hamed; Rikan, Behnam Samadpoor; Oh, Seong Jin; Jang, Byeong Gi; Park, Young-Jun; Khan, Danial; Nga, Truong Thi Kim; Kang, Kyung Tae; Pu, Young Gun; Yoo, Sang-Sun; Lee, Sungho; Lee, Minjae; Hwang, Keum Cheol; Yang, Youngoo; Lee, Kang-Yoon

doi:10.1109/tpel.2018.2872563

Cited by 42 publications

(12 citation statements)

References 19 publications

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“…The peak PCE of 33% is achieved at −8 dBm with an output DC voltage of 3.23 V across 200 k load resistance. The proposed circuit achieves wider input power range than the circuits reported in [14], [15], and [21] while demonstrates better sensitivity than the circuits reported in [15], [16], [22], and [25].…”

Section: B Performance Measurementmentioning

confidence: 83%

“…However, high-power is always connected to antenna which increases the parasitic capacitances once the low-power path is activated to harvest the RF energy. Authors in [16], [17] implement maximum power point tracking (MPPT) technique selecting optimum number of rectifier stages to maintain high PCE over wide input power range. A differential CMOS rectifier used in [18] implements a reconfigurable circuit that reconfigure the stages from parallel to series and vice versa based on the RF power level.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Reconfigurable RF-DC Converter With Wide Input Power Range for RF Energy Harvesting

Khan¹,

Oh²,

Shehzad³

et al. 2020

IEEE Access

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This paper presents a reconfigurable radio frequency to direct current (RF-DC) converter operating at 902 MHz frequency designed to efficiently harvest RF signals and convert into useable DC voltages for RF energy harvesting applications. The proposed scheme employs a dual-path, a series (lowpower) path and a parallel (high-power) path, to maintain high power conversion efficiency (PCE) over wide input power range. The dual-path is composed of two identical rectifier blocks utilizing internal threshold voltage cancellation (IVC) technique to efficiently compensate the threshold voltage of the transistors used as rectifying devices. An adaptive control circuit (ACC) consisting of a comparator, an inverter and three switches is used in the proposed scheme. The ACC activates the series path or the parallel path to maximize the harvested power based on the input power range. The proposed scheme is designed and fabricated in a 180 nm complementary metal-oxide semiconductor (CMOS) technology. The measurement results show that PCE of the proposed circuit is above 20% from −18 dBm to −5 dBm, maintaining 13-dB input power range with peak PCE of 33% at −8 dBm for 200 k load resistance. The proposed circuit demonstrates −20.2 dBm sensitivity across 1 M load resistance while producing 1 V output DC voltage. INDEX TERMS CMOS technology, dual path, power conversion efficiency, reconfigurable, RF-DC power converter, RF energy harvesting.

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Section: B Performance Measurementmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

An Efficient Reconfigurable RF-DC Converter With Wide Input Power Range for RF Energy Harvesting

Khan¹,

Oh²,

Shehzad³

et al. 2020

IEEE Access

Self Cite

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“…Thus, efficient subcarrier allocation in these systems has to take into account the non-linearity of conversion efficiency frequency. Further, maximum power point tracking based RF energy harvesting systems [34] adjust the switching frequency and other operating parameters of a resonant to find the maximum possible power. Therefore, modelling the conversion efficiency as a function of frequency plays an important role for accurate tracking systems.…”

Section: A Literature Review Of Experimental Resultsmentioning

confidence: 99%

A New Non-Linear Joint Model for RF Energy Harvesters in Wireless Networks

AlQahtani

Chen

Feng

et al. 2021

IEEE Trans. on Green Commun. Netw.

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“…The circuit in [19] presents analysis, modeling, and designing of a cross-coupled rectifier based on a discrete component matching network. Authors in [20,21] report maximum power point tracking (MPPT) technique to maintain high efficiency over extended input power range by selecting optimum number of rectifier stages based on RF input power levels. The circuit reported in [22] presents a dual-band rectifier utilizing internal threshold voltage cancellation technique to have low conduction loss of the rectifying devices.…”

Section: Introductionmentioning

confidence: 99%

A 2.45 GHz High Efficiency CMOS RF Energy Harvester with Adaptive Path Control

et al. 2020

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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.

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A -20 to 30 dBm Input Power Range Wireless Power System With a MPPT-Based Reconfigurable 48% Efficient RF Energy Harvester and 82% Efficient A4WP Wireless Power Receiver With Open-Loop Delay Compensation

Cited by 42 publications

References 19 publications

An Efficient Reconfigurable RF-DC Converter With Wide Input Power Range for RF Energy Harvesting

An Efficient Reconfigurable RF-DC Converter With Wide Input Power Range for RF Energy Harvesting

A New Non-Linear Joint Model for RF Energy Harvesters in Wireless Networks

A 2.45 GHz High Efficiency CMOS RF Energy Harvester with Adaptive Path Control

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