Design Considerations of Antennas and Adaptive Impedance Matching Networks for RF Energy Harvesting

Lauder, David; Sun, Yichuang

doi:10.1109/ecctd49232.2020.9218310

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…Thus, it contributes to the upward load impedance transformation as shown in Fig. 4 To implement impedance matching, the simplest approach is to compute the optimized parameters for the components in the matching network [65], [66], [67], [68]. Reference [65] proposed a new analytic model for the Dickson charge pump rectifier which includes the optimum design parameters for the matching network components.…”

Section: B Impedance Matching Networkmentioning

confidence: 99%

“…Reference [65] proposed a new analytic model for the Dickson charge pump rectifier which includes the optimum design parameters for the matching network components. Subsequently, [66] stated the design consideration for the impedance matching network and proposed the general type of impedance matching networks. Nevertheless, [67] presents a detailed analysis and design considerations for lumped (inductor and capacitor) matching networks.…”

Section: B Impedance Matching Networkmentioning

confidence: 99%

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High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

et al. 2023

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The increasing demand for wireless Internet of Things (IoT) calls for power efficient RF energy harvesting approach. The current dominant single-band RF energy harvesting front-end system restricts itself to a single frequency, which is at the risk of ineffective operation when the harvesting frequency is unavailable. This paper reviews and explores the alternative approach of a multiband RF energyharvesting front-end system. It covers all essential circuitry of a multiband RF energy harvesting front-end system, starting from the recent RF surveys which investigate the typical, usable, and high-strength RF input, to the overview of the state-of-the-art antenna, impedance matching network (IMN), and RF-DC rectifier. The recent advancement of the multiple RF input harvesting abilities, reflection loss minimization, and performance improvement are comprehensively reviewed for different operating conditions, and this review also presents the advantages and disadvantages of the different circuit architecture combinations for multiband RF energy harvesting front-end systems. In summary, this review aims to fill the research gap in the further advancement of multiband RF energy harvesting towards enhancing its performance through optimal circuit integration of the front-end system.INDEX TERMS CMOS, power conversion efficiency (PCE), multiband RF energy harvesting, RF power transmission.

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Section: B Impedance Matching Networkmentioning

confidence: 99%

Section: B Impedance Matching Networkmentioning

confidence: 99%

High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

et al. 2023

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“…The best solution to pursue the maximum power transfer under varying loading conditions is an adaptive SP/PS matching network that dynamically updates the value of C S and C P according to the power required by the load, tracking the maximum power efficiency. Banks of Series/Parallel capacitors connected by means of controlled switches driven by mixed-signal feedback loops is the typical approach present in the literature [24,[30][31][32].…”

Section: Fixed Vs Adaptive Matching Networkmentioning

confidence: 99%

Load Modulation Feedback in Adaptive Matching Networks for Low-Coupling Wireless Power Transfer Systems

Bertozzi,

Catania,

Bandini

et al. 2023

Electronics

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This paper explores the use of load modulation feedback (LMF) in adaptive matching networks (MN) for low-coupling inductive wireless power transfer systems, with an emphasis on its use in implantable medical devices. After deriving the handy expressions of link efficiency and modulation depth in the case of LMF in the case of loose coupling, a brief overview of the most common capacitive resonance networks is presented. In particular, the MN employing two capacitors in Series–Parallel and in Parallel–Series configurations allow adaptivity with a wide range of load conditions. Then, the authors describe an effective design procedure of an adaptive matching network with LMF for an inductive wireless power transfer system, exploring the trade-off between power efficiency and modulation depth. Analytical and electrical simulations show that the proposed simple modulation strategy can successfully achieve high power transfer efficiency while maintaining steady back telemetry under varying loading conditions.

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“…Adaptive matching technologies are categorized as radio-frequency (RF) and power-electronics-based. For RF-based technology, the use of mechanical variable reactances [3] ,switching of reactance bank [3][4][5][6][7][8][9][10][11] and mechanical control of inductance [12] improves high-power handling but limits the upper frequency limit and size. Additionally, a varactor diode [13,14] , voltage variable capacitor [15][16][17], or negative impedance circuit [18] is widely used owing to its high-frequency capability, small size, and full electric control, but has poor high-power handling.…”

Section: Introductionmentioning

confidence: 99%

RF-DC conversion circuit using quadrature hybrid for complex maximum power point tracking

Tanahashi,

Hirayama

2024

IEICE Electron. Express

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This paper proposes the concept of a complex maximum power point tracking (MPPT) circuit for adaptive conjugate impedance matching of wireless power transfer. The proposed circuit consists of an orthogonal power distribution circuit using quadrature hybrid and two rectifier circuits and DC-DC converters. By controlling the input impedance of two DC-DC converters, the complex impedance of RF input can be varied to satisfy complex conjugate matching. This circuit enables high-power and high-frequency handling for matching circuits because no variable device is used in the RF region, and control is done in the DC region. Measurements at 433 MHz confirm that complex impedance in the RF region can be controlled by adjusting the two real impedances.

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Design Considerations of Antennas and Adaptive Impedance Matching Networks for RF Energy Harvesting

Cited by 6 publications

References 15 publications

High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

High-Performance Multiband Ambient RF Energy Harvesting Front-End System for Sustainable IoT Applications—A Review

Load Modulation Feedback in Adaptive Matching Networks for Low-Coupling Wireless Power Transfer Systems

RF-DC conversion circuit using quadrature hybrid for complex maximum power point tracking

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