5.8 GHz High-Efficiency RF–DC Converter Based on Common-Ground Multiple-Stack Structure

Bae, Ji Cheol; Yi, Sang-Hwa; Choi, Woojin; Koo, Hyungmo; Hwang, Keum Cheol; Lee, Kang-Yoon; Yang, Youngoo

doi:10.3390/s19153257

Cited by 18 publications

(15 citation statements)

References 26 publications

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“…9 and Fig. 10, photographs and measured results of the MA4E-1319 based rectifying multi-stage doubler are given, as presented in [24]. The substrate material is RF35, which has a thickness of 520 μm.…”

Section: A Antenna Designmentioning

confidence: 99%

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Extendable Array Rectenna for a Microwave Wireless Power Transfer System

et al. 2021

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A rectenna is adopted in a microwave-based wireless power transfer system to rectify the received RF to DC power. Each rectenna includes a DC-DC converter at the DC output port to ensure a stable power supply and a Schottky diode for the DC-combining network. The results demonstrate that the RF-DC conversion efficiencies of the rectifier circuit and 4 × 1 rectenna were 71% and 71.2% when the unit-cell RF input level was 19 dBm and 19.6 dBm. The DC output levels of a 4 × 8 rectenna with and without the DC-DC converter were 28 V and 30 V when the unit-cell RF input level was 20.2 dBm. The RF-DC conversion efficiency was measured as 52.6% and 59.9% with and without the DC-DC converter, respectively. The Schottky diode combined with the D-DC C converter at the DC output port exhibits an increase in the DC power combining level, making it suitable for an extendable array rectenna system.

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Section: A Antenna Designmentioning

confidence: 99%

“…Recently, reports based on the bare Schottky diode for higher efficiency and high-power transfer have been published [22][23]. By utilizing a common-ground and multiple-stack structure based on a bare Schottky diode, an RF-DC conversion efficiency of 73.1% was achieved with the rectifying circuit [24].…”

Section: Introductionmentioning

confidence: 99%

Extendable Array Rectenna for a Microwave Wireless Power Transfer System

et al. 2021

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“…This highlights that RF WPT is an inherently inefficient method of energy transfer and continued research into new architectures and design parameter selection is required. Notwithstanding these premises, RF energy transfer still represents a convenient way to supply energy to small energy devices such as IoT and wireless sensor nodes [54,69,70]. A BLE radio was used for data communication, as the system requires an ultra-low-power radio which is compatible with the specifications relating to the quantity of data to be exchanged and the communication data rate.…”

Section: System Descriptionmentioning

confidence: 99%

Advanced Monitoring Systems Based on Battery-Less Asset Tracking Modules Energized through RF Wireless Power Transfer

Rosa

Dehollain

Livreri

2020

Sensors

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Asset tracking involving accurate location and transportation data is highly suited to wireless sensor networks (WSNs) featuring battery-less nodes that can be deployed in virtually any environment and require little or no maintenance. In response to the growing demand for advanced battery-less sensor tag solutions, this article presents a system for identifying and monitoring the speeds of assets in a WSN with battery-less tags that receive all their operating energy through radio frequency (RF) wireless power transfer (WPT) architecture, and a unique measurement approach to generate time-domain speed readouts. The assessment includes performance characteristics and key features of a system on chip (SoC) purposely designed to power a node through RF WPT. The result is an innovative solution for RF to DC conversion able to address the principal difficulties associated with maximum power conversion efficiency (PCE) with sensitivity and vice versa, a strategy, and a design optimization model to indicate the number of readers required for reliable asset identification and speed measurement. Model validation is performed through specific tests. Experimental results demonstrating the viability of the proposed advanced monitoring system are provided.

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“…The part that determines the performance of the receiver is the rectifier. There are various rectifier design methods [1][2][3][4][5][6]. A half-wave rectifier circuit [1,2] can convert the input signal in the positive or negative region to DC by arranging Schottky diodes in series or shunts.…”

Section: Introductionmentioning

confidence: 99%

Design of a Highly Efficient N-Stage Harmonic Terminated Voltage Multiplier for Wireless Power Transfer

Kim

Park

2021

Energies

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This paper proposes a 5.8 GHz highly efficient rectifier design using harmonic termination for wireless power transfer. The diode used to convert the received RF power to DC is a non-linear device, and a harmonic component is generated, which causes performance degradation. Therefore, in this paper, we designed a band stop filter for harmonic termination and proposed the N-stage harmonic terminated voltage multiplier (N-stage HTVM). The number of stages N can be designed differently to operate with high efficiency at various input powers for the proposed rectifier. In the proposed rectifier circuit, mathematical analysis of output DC voltage, power loss of the diode, and the power conversion efficiency (PCE) were evaluated through voltage/current waveform analysis of the diode. The design method of the filter for terminating harmonics is presented. Furthermore, the change of PCE according to the increase in the number of stages was analyzed using the equivalent model of the proposed circuit and verified through measurement. The maximum PCE of one-stage HTVM was 68% when 18 dBm of input power was applied. The DC output voltage was measured to 11.6 V. When the RF input power was 25 dBm and the load was 1500 Ω, the maximum PCE of the two-stage HTVM was 71% and the maximum DC output voltage was measured as 15.8 V. The measured performance of three-stage HTVM had a PCE of 67% and DC output voltage of 19.8 V when the input power was 30 dBm.

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5.8 GHz High-Efficiency RF–DC Converter Based on Common-Ground Multiple-Stack Structure

Cited by 18 publications

References 26 publications

Extendable Array Rectenna for a Microwave Wireless Power Transfer System

Extendable Array Rectenna for a Microwave Wireless Power Transfer System

Advanced Monitoring Systems Based on Battery-Less Asset Tracking Modules Energized through RF Wireless Power Transfer

Design of a Highly Efficient N-Stage Harmonic Terminated Voltage Multiplier for Wireless Power Transfer

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