A 2.4-GHz CMOS Class-E Synchronous Rectifier

Dehghani, Soroush; Johnson, Thomas

doi:10.1109/tmtt.2016.2547393

Cited by 24 publications

(10 citation statements)

References 21 publications

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“…Rectifiers based on CMOS processes have been normally used for wireless sensor applications. The CMOS process has advantages in that they carry a small chip area at a low cost instead of the relatively low RF‐to‐DC conversion efficiency . Rectifiers with discrete GaN or GaAS FETs can be designed to obtain a relatively high RF‐to‐DC conversion efficiency and a high output power.…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency rectifier (5.2 GHz) using a Class‐FDickson charge pump

Bae

Koo

Lee

et al. 2017

Micro & Optical Tech Letters

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This article presents a 5.2 GHz high‐efficiency rectifier, based on a Class‐F Dickson charge pump, for use in RF energy harvesting systems. A single‐stage Dickson charge pump with two Schottky diodes was adopted to produce a high‐output DC voltage. A harmonic source‐pull simulation was conducted to optimize the third harmonic impedance for the Class‐F harmonic termination. The proposed scheme is verified by designing and implementing a hybrid Class‐F Dickson charge pump for the 5.2 GHz band using two Schottky diodes in a package. The proposed rectifier has a very small size of 19 18 mm2, and the implemented rectifier exhibited a high RF‐to‐DC conversion efficiency of 64.1% and an output DC voltage of 5.1 V at an input power of 24 dBm for the 5.2 GHz single‐tone signal.

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Section: Introductionmentioning

confidence: 99%

High‐efficiency rectifier (5.2 GHz) using a Class‐FDickson charge pump

Bae

Koo

Lee

et al. 2017

Micro & Optical Tech Letters

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“…As shown in Fig. 3, the input impedance is made up by a series combination of the input resistance R in and the input reactance X in , both of which are determined at the operating frequency [19] Z in = R in + jX in (12) The fundamental component of the input voltage is defined as below:…”

Section: Proposed Design Of the Rf-dc Convertermentioning

confidence: 99%

Adaptive impedance matching of rectifier for a 100 MHz microwave power transfer system

Zhu

Jin

Chen

2019

IET Power Electronics

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Microwave power transmission (MPT) has been one of the most promising systems in the far-field wireless power transmission system. In MPT system, the harmonic energy generated by conventional diode rectifying circuit has great impact on the overall efficiency. Moreover, the passive impedance network leads to power reflection, which is the other factor leading to the overall efficiency decline. In this study, a 10 W output 100 MHz two-stage adaptive impedance-matching rectifying circuit is proposed which can make input impedance constant. About 100 MHz belongs to the band of radio frequency (RF) and the conception of microwave. The first-stage rectifier is modelled mathematically, which plays an essential role in constructing the initial input impedance and designing the control method of second-stage converter. By adjusting the duty cycle of the secondstage converter, the impedance of the whole rectifier realises 50 Ω under various input and the output conditions by means of simulations and experiments. The simulation and experimental results are shown to verify the effectiveness of the proposed RF to direct current converter and its control method. The overall efficiency with full load is up to nearly 65%.

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“…There is increased interest in class-E diode or FET-based rectifiers for efficiently recovering power from an incident RF signal in energy harvesting and far-field wireless power transmission applications (WPT). As an example, a recent synchronous rectifier demonstrated in 0.13 µm CMOS technology at 2.4 GHz [24] is intended for wireless sensors that do not require batteries. A photograph of the 850 µm x 870 µm rectifier die is reproduced in Fig.…”

Section: Recent Applications and Design Examplesmentioning

confidence: 99%

“…Experimentally evaluated with Si Schottky diodes for VHF rectification, this method should translate well to transistorbased topologies at UHF and the lower microwave bands. In [24], an exhaustive performance comparison of recently reported RF rectifier circuits was included.…”

Section: Recent Applications and Design Examplesmentioning

confidence: 99%

Class-E Rectifiers and Power Converters: The Operation of the Class-E Topology as a Power Amplifier and a Rectifier with Very High Conversion Efficiencies

Garcia

Popović

2018

IEEE Microwave

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In the late 70's, the interest in reducing the value and size of reactive components moved power supply specialists to operate dc-to-dc converters at hundreds of kHz or even MHz frequencies. Passive energy storage (mainly magnetics) dominates the size of power electronics, limiting also its cost, reliability and dynamic response. Motivated by miniaturization and improved control bandwidth, they had to face the frequencydependent turn-on and turn-off losses associated with the use of rectangular waveforms in the hard-switched topologies of that time. Similar to approaches for RF/microwave power amplifiers (PAs), the introduction of resonant circuits allowed shaping either a sinusoidal voltage or current, with parasitic reactive elements absorbed by the topology in the neighborhood of the switching frequency. The resulting resonant power converters, obtained by cascading a dc-to-ac resonant inverter with a high-frequency acto-dc rectifier, first transform the dc input power into controlled ac power, and then convert it back into the desired dc output [1]. This paper provides some historic notes on the operation of the class-E topology, introduced worldwide to the RF/microwave community by Nathan O. Sokal [2], as a power inverter and as a rectifier, with very high conversion efficiencies up to microwave frequencies. Recent research advances and implementations of class-E rectifiers and dc-to-dc converters at UHF and beyond are included. Offering competitive performance in terms of efficiency for RF power recovery, together with a wide bandwidth for low-loss power conversion, their potential for some modern applications is highlighted.

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A 2.4-GHz CMOS Class-E Synchronous Rectifier

Cited by 24 publications

References 21 publications

High‐efficiency rectifier (5.2 GHz) using a Class‐FDickson charge pump

High‐efficiency rectifier (5.2 GHz) using a Class‐FDickson charge pump

Adaptive impedance matching of rectifier for a 100 MHz microwave power transfer system

Class-E Rectifiers and Power Converters: The Operation of the Class-E Topology as a Power Amplifier and a Rectifier with Very High Conversion Efficiencies

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