A 868MHz CMOS RF-DC power converter with &amp;#x2212;17dBm input power sensitivity and efficiency higher than 40% over 14dB input power range

Scorcioni, S.; Bertacchini, Alessandro; Larcher, Luca

doi:10.1109/esscirc.2012.6341268

Cited by 23 publications

(9 citation statements)

References 9 publications

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“…Unfortunately, with typical RF to DC circuit architectures, it is difficult to optimize both parameters at the same time because the sensitivity and PCE characteristics tend to work against each other. Thus, dynamic systems require the ability to dynamically track the available power over a wide range using MPPT techniques [73][74][75][76][77][78]. These techniques share the common requirement of having to measure input power, which is not a straightforward task in an ultra-low-power environment, as this functionality inevitably consumes further power and contributes to further reducing the PCE of the system.…”

Section: System Designmentioning

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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Section: System Designmentioning

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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“…In [14], another energy harvester at a frequency of 868 M Hz was designed for RFID and remote powering applications. This design aimed to maximize the range of the input power that provides high efficiency, in particular, an efficiency higher than 40% for a range of 14 dB input power.…”

Section: B High Input Powermentioning

confidence: 99%

New Formula for Conversion Efficiency of RF EH and Its Wireless Applications

Chen

Sabnis

Abd‐Alhameed

2016

IEEE Trans. Veh. Technol.

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“…A matching network made by a series inductance L match and a parallel capacitance C match is adopted in order to match the rectifier with the 50 Ω UHF dipole antenna. The output voltage of the multiplier in the absence of a connected resistive load is given by

V_{normald normald} = 2 \cdot N_{D} \cdot ((), V_{normalp normalk} - V_{drop})

where N D is the number of stages, V pk is the peak amplitude of the RF input waveform, and V drop is the voltage drop across the RF‐DC rectifier diodes [ Scorcioni et al ., ]. When the Pelliconi's charge pump is connected to the Dickson's rectifier (Figure ), equation can be rewritten as

V_{normald normald} = 2 \cdot N_{D} \cdot ((), V_{normalp normalk} - V_{drop}) - I_{L} \cdot R_{out}

…”

Section: Architecture Of the Power Management Circuitmentioning

confidence: 99%

“…where N D is the number of stages, V pk is the peak amplitude of the RF input waveform, and V drop is the voltage drop across the RF-DC rectifier diodes [Scorcioni et al, 2012]. When the Pelliconi's charge pump is connected to the Dickson's rectifier ( Figure 1), equation (1) can be rewritten as…”

Section: The Rf-dc Rectifiermentioning

confidence: 99%

UHF front‐end feeding RFID‐based body sensor networks by exploiting the reader signal

et al. 2016

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This paper presents an integrated, high‐sensitivity UHF radio frequency identification (RFID) power management circuit for body sensor network applications. The circuit consists of a two‐stage RF‐DC Dickson's rectifier followed by an integrated five‐stage DC‐DC Pelliconi's charge pump driven by an ultralow start‐up voltage LC oscillator. The DC‐DC charge pump interposed between the RF‐DC rectifier and the output load provides the RF to load isolation avoiding losses due to the diodes reverse saturation current. The RF‐DC rectifier has been realized on FR4 substrate, while the charge pump and the oscillator have been realized in 180 nm complementary metal oxide semiconductor (CMOS) technology. Outdoor measurements demonstrate the ability of the power management circuit to provide 400 mV output voltage at 14 m distance from the UHF reader, in correspondence of −25 dBm input signal power. As demonstrated in the literature, such output voltage level is suitable to supply body sensor network nodes.

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A 868MHz CMOS RF-DC power converter with −17dBm input power sensitivity and efficiency higher than 40% over 14dB input power range

Cited by 23 publications

References 9 publications

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

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

New Formula for Conversion Efficiency of RF EH and Its Wireless Applications

UHF front‐end feeding RFID‐based body sensor networks by exploiting the reader signal

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