Novel Microwave Rectifier Optimizing Method and Its Application in Rectenna Designs

Zhang, Quanqi; Ou, Jun-Hui; Wu, Zhouzhen; Tan, Hongzhou

doi:10.1109/access.2018.2871087

Cited by 25 publications

(18 citation statements)

References 29 publications

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“…The research field of wireless power transfer (WPT) has attracted considerable attention due to the novel batteryfree solutions it could enable in many emerging applications across different domains such as infrastructure robotics, Internet of Things (IoT) devices, and sensor networks [1,2]. A lot of results have already been reported for WPT circuits and systems operating in the sub-6 GHz frequency bands such as 433 MHz, 868 MHz, and 2.4 GHz.…”

Section: Introductionmentioning

confidence: 99%

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Wireless Power Transfer System for Battery-Less Sensor Nodes

et al. 2020

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For the first time, the design and implementation of a fully-integrated wireless information and power transfer system, operating at 24 GHz and enabling battery-less sensor nodes, is presented in this paper. The system consists of an RF power source, a receiver antenna array, a rectifier, and a batteryless sensor node which communicates via backscatter modulation at 868 MHz. The rectifier circuits use commercially available Schottky diodes to convert the RF power to DC with a measured efficiency of up to 35%, an improvement of ten percentage points compared with previously reported results. The rectifiers and the receive antenna arrays were jointly designed and optimised, thereby reducing the overall circuit size. The battery-less sensor transmitted data to a base station realised as a GNU Radio flow running on a bladeRF Software Defined Radio module. The whole system was tested in free-space in laboratory conditions and was capable of providing sufficient energy to the sensor node in order to enable operation and wireless communication at a distance of 0.15 metres.

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Section: Introductionmentioning

confidence: 99%

“…The two major requirements of an efficient wireless power transfer system are a high-gain directional antenna and a rectifier circuit with high RF-DC conversion efficiency [2]. A rectenna is the combination of a receive antenna and a rectifier that together form a complete WPT receiver [1,5].…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer System for Battery-Less Sensor Nodes

et al. 2020

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“…On the other hand, RF-to-DC efficiency depends on the receiving antenna performance, the impedance matching network between the antenna and the rectifying circuit, and the overall power conversion efficiency of the rectifier's subsequent stage, that is, the voltage multiplier. Traditionally, the efficiency of any rectifying circuit is controlled and improved by optimizing the circuit design [5,6]. Additionally, it can be further improved by using a high peak-to-average power ratio (PAPR) multi-sine signals that have demonstrated improved efficiency performance compared to the conventional sinusoidal signals [7,8].…”

Section: Introductionmentioning

confidence: 99%

Voltage-Doubler RF-to-DC Rectifiers for Ambient RF Energy Harvesting and Wireless Power Transfer Systems

Quddious¹,

Antoniades²,

Vryonides³

et al. 2020

Recent Wireless Power Transfer Technologies

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Wireless Power Transfer (WPT) is promoted as a key enabling technology (KET) for the widespread use of batteryless Internet of Things (IoT) devices and for 5G wireless networks. RF-to-DC rectifiers are essential components for the exploitation of either ambient RF power or wireless transmitted power from a dedicated source. There are several alternative rectifier topologies which can be selected depending on the desired wireless charging scenario and may include one or more diodes. For full rectification, a minimum of two diodes are needed. The current chapter discusses various implementations of voltage-doubler designs, which revolve around the basic topology of two diodes and two capacitors. Schottky diodes are usually used, in combination with lumped capacitors. Off-the-shelf diodes include both separate diodes and integrated voltage-doubler topologies in a single package. Rectifiers are inherently narrowband, non-linear devices, and the RF-to-DC efficiency, which is usually the figure of merit, depends non-linearly on both the termination load and the received RF power. The bandwidth of the rectifier depends on the preceding matching network.

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“…Many studies have been reported on near field and low frequency WPT. Due to emerging trends of millimter wave (mmW) communications and rapid development of Internet-of-Things devices and sensor nodes, the WPT has grabbed attention in wireless power charging and battery-free solutions in these emerging applications [1,2]. An efficient wireless power transfer system mainly depends on the efficient rectenna (antenna + rectifier) design and specifically a rectifier circuit with high RF-DC conversion efficiency [2].…”

Section: Introductionmentioning

confidence: 99%

“…Due to emerging trends of millimter wave (mmW) communications and rapid development of Internet-of-Things devices and sensor nodes, the WPT has grabbed attention in wireless power charging and battery-free solutions in these emerging applications [1,2]. An efficient wireless power transfer system mainly depends on the efficient rectenna (antenna + rectifier) design and specifically a rectifier circuit with high RF-DC conversion efficiency [2]. Therefore most of the research efforts focued on the enhancement of RF-DC conversion efficiency of rectifier circuit specifically for thin and flexible substrate materials [3].…”

Section: Introductionmentioning

confidence: 99%

Flexible Rectennas for Wireless Power Transfer to Wearable Sensors at 24 GHz

Malik

Doychinov

Zaidi

et al. 2019

2019 Research, Invention, and Innovation Congress (RI2C)

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This paper presents the design and implementation of efficient & compact flexible rectennas (antenna + rectifier) for wireless power transfer to wearable IoT sensor nodes at 24 GHz. Two different rectifier configurations i.e. shunt and voltage doubler have been analyzed for performance comparison. Experimental results of complete rectenna have also been demonstrated for conformal surfaces. The proposed flexible rectifiers is fabricated through conventional PCB manufacturing method. Measured RF-DC conversion efficiency of 31% and DC voltage of up to 2.4 V is achieved for 20 dBm input power across an optimal load resistance of 300Ω at 24 GHz.

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Novel Microwave Rectifier Optimizing Method and Its Application in Rectenna Designs

Cited by 25 publications

References 29 publications

Wireless Power Transfer System for Battery-Less Sensor Nodes

Wireless Power Transfer System for Battery-Less Sensor Nodes

Voltage-Doubler RF-to-DC Rectifiers for Ambient RF Energy Harvesting and Wireless Power Transfer Systems

Flexible Rectennas for Wireless Power Transfer to Wearable Sensors at 24 GHz

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