Analysis of rectifier operation with FSK modulated input signal

Sakaki, Hiroto; Yoshida, Shizuo; Nishikawa, Kenjiro; Kawasaki, Shigeo

doi:10.1109/wpt.2013.6556914

Cited by 12 publications

(13 citation statements)

References 1 publication

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“…Initial results have shown that signals with peak-to-average-power (PAPR) ratio greater than 3 dB, which corresponds to the PAPR of a pure sine wave, may lead to a higher RF-DC conversion efficiency compared to continuous wave (CW) signals. The effect of different signals with a timevarying envelope on the RF-DC conversion efficiency has been investigated, such as chaotic waveforms [4] as well as various digitally modulated signals and white noise [5][6][7][8]. The results show that it is possible to obtain a better RF-DC conversion efficiency compared to CW signals using signals with a high PAPR.…”

Section: A Waveform Design For Maximizing Rf-dc Conversion Efficiencymentioning

confidence: 99%

“…For these reasons, particular attention has to be given by the scientific community to the demonstration of substrate independent processes which make possible the application of the devices on many materials, especially those not normally used in electronics [85]. Common substrate independent processes which fit these requirements are: inkjet printing [7], 3D printing, gravure printing, screen printing and metal adhesive laminate [86,87].…”

Section: A Wpt Integration In Buildingsmentioning

confidence: 99%

See 1 more Smart Citation

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

Team¹

2017

IEEE Microwave

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Section: A Waveform Design For Maximizing Rf-dc Conversion Efficiencymentioning

confidence: 99%

Section: A Wpt Integration In Buildingsmentioning

confidence: 99%

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

Team¹

2017

IEEE Microwave

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“…Alternatively an efficiency expression η using the input RF power can be used [15]. η A represents a lower bound of η (η A ≤ η).…”

Section: Theoretical Analysismentioning

confidence: 99%

“…The nonlinear algebraic differential equation system (12) or (14) may be solved by numerical integration. Equation (15) presents an interesting result showing that the average value of B 0 (z 1 (t)) together with the output load R L determine the output dc voltage y L , however, it also requires to numerically solve (14) in order to obtain z 1 (t). Despite the benefit of (12) and (14) to provide insight into the factors that determine the optimum rectifier performance, due to its complexity a commercial harmonic-balance simulator is used in this paper to optimize the performance of the rectifier under signals with a time-varying envelope.…”

Section: A Model Definitionmentioning

confidence: 99%

RF Energy Harvesting From Multi-Tone and Digitally Modulated Signals

Bolos

Blanco

Collado

et al. 2016

IEEE Trans. Microwave Theory Techn.

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This paper presents the design of an RF energyharvesting circuit when excited by signals with a time-varying envelope such as multi-tone signals or digitally modulated signals with random modulation. The input matching network and the output load of a rectifier circuit are simultaneously optimized using harmonic balance in order to maximize its RF-dc conversion efficiency. This paper focuses on identifying the optimum load value, which corresponds to maximum efficiency for different types of input signals. The efficiency curves versus the load value show a single optimum efficiency point, which is a different for signals with a time-varying envelope and continuous wave (CW) signals. Specifically, for the series diode rectifier that was considered, the optimal load shifts to larger values as the signal peak-to-average-power-ratio (PAPR) increases compared to a CW signal with the same average power. As a result, for certain load values a signal with a time-varying envelope can result in a larger efficiency value than a CW signal. The peak efficiency value does not necessarily improve by using a signal with a time-varying envelope. A UHF rectifier prototype is built and its performance is evaluated experimentally showing good agreement with simulation.

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“…For example, [24] reported that a signal with higher peak-to-average-power ratio (broadband signal) tends to have higher conversion efficiency than a CW signal. On the other hand, [25] found that a modulated broadband signal has much lower conversion efficiency than a CW signal. The necessary conditions of a rectifier for efficient conversion of modulated signals need to be investigated.…”

Section: Energy Harvesting Experimentsmentioning

confidence: 99%

Loop Antenna Over Artificial Magnetic Conductor Surface and Its Application to Dual-Band RF Energy Harvesting

Kamoda

Kitazawa²,

Kukutsu

et al. 2015

IEEE Trans. Antennas Propagat.

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This paper studies loop antennas over artificial magnetic conductor (AMC) surfaces with the objective of designing a dual-band RF energy harvesting antenna. The AMC surface is well known to achieve low-profile and higher-gain wire antennas. From a practical point of view, impedance matching is of paramount importance to achieve highly efficient reception of weak ambient RF energy. Firstly, the driving-point impedance of a loop antenna over an AMC surface was studied, where a conventional method using image theory to estimate the impedance was found to be not always useful for loop antennas. As the AMC surface is within the reactive near field, mutual coupling between the antenna and the AMC unit cells is significant, which the conventional method does not take into account. We then proposed a novel use of a polarization dependent AMC surface for dual-band RF energy harvesting. An AMC surface with a rectangular unit cell was adopted for two orthogonal polarizations with different frequencies. Finally, the AMC surface and the loop antennas were successfully implemented as a dualband energy harvesting panel together with RF-to-DC conversion circuits and a power management circuit.

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Analysis of rectifier operation with FSK modulated input signal

Cited by 12 publications

References 1 publication

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

RF Energy Harvesting From Multi-Tone and Digitally Modulated Signals

Loop Antenna Over Artificial Magnetic Conductor Surface and Its Application to Dual-Band RF Energy Harvesting

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