Harmonic enhanced location detection technique for energy harvesting receiver with resonator coupling design

Peng, Chun-Jung; Yang, Sheng-Fan; Huang, An-Ching; Huang, Tzuen-Hsi; Chung, Pei-Jung; Wu, Fang–Jing

doi:10.1109/wpt.2017.7953870

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…Only an impedance transformer at P 2 introduces little even-mode performance deterioration [4]. It is worth highlighting that the property of the modified rat-race coupler at ω 0 can be approximated using (1), which is the same for the conventional rat-race coupler…”

Section: Rf-to-dc Power Conversionmentioning

confidence: 97%

“…V s cosω 0 t is assumed as an incident signal at P 4 , which can be distributed differentially to P 1 and P 3 while P 2 remains isolated from P 4 based on (1). Therefore, the distributed signals for VD I and VD II are represented by…”

Section: Rf-to-dc Power Conversionmentioning

confidence: 99%

“…Experimental validations are demonstrated by both simulation and measurement. Since the second‐harmonic readout has been verified with a strong relation to the antenna misalignment [1], this presented dual‐mode charge pump brings a prospect for antenna alignment in WPT system by further exploiting second harmonics.…”

Section: Introductionmentioning

confidence: 99%

“…Introduction: Wireless power transfer (WPT) efficiency always suffers from antenna misalignment, which deteriorates the whole WPT system's performance considerably. To address this problem, second harmonic from a rectifier was enhanced [1] for the illuminated beam localisation, which is helpful to improve the WPT efficiency by adjusting a receiving antenna's radiation direction. However, the added second-harmonic-enhanced circuit consisting of an LC resonator and a direct current (dc) controlled switch complicates WPT system design.…”

mentioning

confidence: 99%

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Dual‐mode charge pump with second‐harmonic readout for antenna alignment in wireless power transfer system

Zhang

Guo²,

2019

Electron. lett.

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A charge pump is presented by integrating two identical voltage doublers and a modified rat-race coupler to enable its dual-mode operations: radio-frequency (RF)-to-direct current (dc) power conversion and second-harmonic readout. Due to the property of the modified rat-race coupler, it is able to differentially divide incident RF signals for successive voltage doublers' high-efficiency rectification, and couple second harmonics for readout in two highly isolated channels. Output dc voltages are combined in parallel on a single load resistance for more practicality. Experimental validations are demonstrated by both simulation and measurement with a maximum RF-to-dc power conversion efficiency of 71.3% and −14.2 dBm second-harmonic generation with an incident signal power of 19 dBm. This dual-mode charge pump brings a prospect for antenna alignment in the wireless power transfer system by further exploiting second harmonics.

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Section: Rf-to-dc Power Conversionmentioning

confidence: 97%

Section: Rf-to-dc Power Conversionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Dual‐mode charge pump with second‐harmonic readout for antenna alignment in wireless power transfer system

Zhang

Guo²,

2019

Electron. lett.

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“…It is therefore possible to transmit power to MAVs efficiently at that frequency. Nevertheless, no study has examined the transmission of power to MAVs at 94 GHz because the antenna directivity is too high [7,8] and because the rectifier efficiency is too low. Additionally, in MMW circuits, the conductor and dielectric loss in the oscillator and transmission line parts become greater than those related to microwaves.…”

Section: Introductionmentioning

confidence: 99%

Development of a 100 mW-Class 94 GHz High-Efficiency Single-Series Rectifier Feed by Finline for Micro-UAV Application

Kosumo

Komurasaki

Hatakeyama

et al. 2020

Active and Passive Electronic Components

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Wireless power transfer (WPT) is one solution to realize long flight times and accommodate various missions of micro-uncrewed aerial vehicles (MAVs). Reducing the constraint of power transmission distance and realizing high beam efficiency are possible because of the high directivity of WPT using millimeter wave (MMW) methods. Nevertheless, no report of the relevant literature describes an investigation of sending power to an MAV using MMW because MMW rectennas have low efficiency. The purpose of our study is to conduct fundamental research of a high-efficiency and high-power rectenna at 94 GHz aimed at MAV application using MMW. As described herein, we developed and evaluated a 100-mW-class single-diode rectifier at 94 GHz with a finline of a waveguide (WG) to a microstrip-line (MSL) transducer. With the optimum load of 150 Ω at input power of 128 mW, the output DC power and rectifying efficiency were obtained respectively as 41.7 mW and 32.5%. By comparison to an earlier study, measurement of 94 GHz rectifiers under high power input becomes more accurate through this study.

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Scavenging Microwave Wireless Power: A Unified Model, Rectenna Design Automation, and Cutting-Edge Techniques

Gao

Zhang

et al. 2023

Engineering

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Harmonic enhanced location detection technique for energy harvesting receiver with resonator coupling design

Cited by 13 publications

References 4 publications

Dual‐mode charge pump with second‐harmonic readout for antenna alignment in wireless power transfer system

Dual‐mode charge pump with second‐harmonic readout for antenna alignment in wireless power transfer system

Development of a 100 mW-Class 94 GHz High-Efficiency Single-Series Rectifier Feed by Finline for Micro-UAV Application

Scavenging Microwave Wireless Power: A Unified Model, Rectenna Design Automation, and Cutting-Edge Techniques

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