Beamed microwave power transmission and its application to space

Brown, W. C.; Eves, E. Eugene

doi:10.1109/22.141357

Cited by 252 publications

(103 citation statements)

References 9 publications

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“…(25) In contrast to the single-user counterpart in (3) having a single circuit-power constraint, the sum throughput in (25) contains multi-user circuit-power constraints. The corresponding power-control problem is formulated as follows:…”

Section: Power Control For Multi-user Swipt Systems With Downlink Itmentioning

confidence: 99%

Simultaneous Information and Power Transfer for Broadband Wireless Systems

Huang

Larsson

2013

IEEE Trans. Signal Process.

433

372

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Abstract-Far-field microwave power transfer (MPT) will free wireless sensors and other mobile devices from the constraints imposed by finite battery capacities. Integrating MPT with wireless communications to support simultaneous wireless information and power transfer (SWIPT) allows the same spectrum to be used for dual purposes without compromising the quality of service. A novel approach is presented in this paper for realizing SWIPT in a broadband system where orthogonal frequency division multiplexing and transmit beamforming are deployed to create a set of parallel sub-channels for SWIPT, which simplifies resource allocation. Based on a proposed reconfigurable mobile architecture, different system configurations are considered by combining single-user/multi-user systems, downlink/uplink information transfer, and variable/fixed coding rates. Optimizing the power control for these configurations results in a new class of multi-user power-control problems featuring the circuitpower constraints, specifying that the transferred power must be sufficiently large to support the operation of the receiver circuitry. Solving these problems gives a set of power-control algorithms that exploit channel diversity in frequency for simultaneously enhancing the throughput and the MPT efficiency. For the system configurations with variable coding rates, the algorithms are variants of water-filling that account for the circuit-power constraints. The optimal algorithms for those configurations with fixed coding rates are shown to sequentially allocate mobiles their required power for decoding in ascending order until the entire budgeted power is spent. The required power for a mobile is derived as simple functions of the minimum signal-to-noise ratio for correct decoding, the circuit power and sub-channel gains.

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Section: Power Control For Multi-user Swipt Systems With Downlink Itmentioning

confidence: 99%

Simultaneous Information and Power Transfer for Broadband Wireless Systems

Huang

Larsson

2013

IEEE Trans. Signal Process.

433

372

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“…Until now, there have been many efforts to be made to improve this technology as well as its applications. These efforts include medium-range transmission based on electromagnetic resonance and long-range transmission using microwaves (Greene et al, 2007;Brown & Eves, 1992). Although the investigation of long-range power delivery via far-field techniques was carried out with endeavors, the efficiency or power delivery is still quite low that is not sufficient to fully charge typical electronic gadgets overnight.…”

Section: Introductionmentioning

confidence: 99%

Maximizing Efficiency of Electromagnetic Resonance Wireless Power Transmission Systems with Adaptive Circuits

Hoang¹,

Bien²

2012

Wireless Power Transfer - Principles and Engineering Explorations

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“…Examples of such high-power wireless power transfer applications include the coupling of a solar-powered satellite (SPS) with microwave transfer to either Earth or other satellites [5]- [7], as a means to provide increased energy to a transfer vehicle in low-earth orbit to augment propulsion [8], and for the wireless powering of low-altitude airborne vehicles including helicopters [9]. Recently, there has been interest in using high-power microwave power transmission to high altitude platforms (HAPs) acting as communications basestations for both powering and station keeping [26]- [29].…”

Section: Introductionmentioning

confidence: 99%

Transmission Line Resistance Compression Networks and Applications to Wireless Power Transfer

Barton

Gordonson

Perreault

2015

IEEE J. Emerg. Sel. Topics Power Electron.

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Abstract-Microwave-to-dc rectification is valuable in many applications including rf energy recovery, dc-dc conversion, and wireless power transfer. In such applications, it is desired for the microwave rectifier system to provide a constant rf input impedance. Consequently, variation in rectifier input impedance over varying incident power levels can hurt system performance. To address this challenge, we introduce multi-way transmissionline resistance compression networks (TLRCNs) for maintaining near-constant input impedance in rf-to-dc rectifier systems. A development of TLRCNs is presented, along with their application to rf-to-dc conversion and wireless power transfer. We derive analytical expressions for the behavior of TLRCNs, and describe two design methodologies applicable to both single and multi-stage implementations. A 2.45-GHz 4-way TLRCN network is implemented and applied to create a 4-Watt resistancecompressed rectifier system that has narrow-range resistive input characteristics over a 10-dB power range. It is demonstrated to improve the impedance match to mostly-resistive but variable input impedance class-E rectifiers over a 10-dB power range. The resulting TLRCN plus rectifier system has >50% rf-to-dc conversion efficiency over a >10-dB input power range at 2.45 GHz (peak efficiency 70%), and SWR <1.1 over a 7.7-dB range, despite a non-negligible reactive component in the rectifier loads.

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Beamed microwave power transmission and its application to space

Cited by 252 publications

References 9 publications

Simultaneous Information and Power Transfer for Broadband Wireless Systems

Simultaneous Information and Power Transfer for Broadband Wireless Systems

Maximizing Efficiency of Electromagnetic Resonance Wireless Power Transmission Systems with Adaptive Circuits

Transmission Line Resistance Compression Networks and Applications to Wireless Power Transfer

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