Optimized rectenna design
TL;DR: In this paper, the RF-to-dc power conversion efficiency (PCE) of a rectenna was investigated at a frequency of 868 MHz, where a high-ohmic loaded rectifier will lead to a highly sensitive and power conversion efficient rectenna.
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Abstract: Design steps are outlined for maximizing the RF-to-dc power conversion efficiency (PCE) of a rectenna. It turns out that at a frequency of 868 MHz, a high-ohmic loaded rectifier will lead to a highly sensitive and power conversion efficient rectenna. It is demonstrated that a rectenna thus designed, using a 50 O antenna and lumped element matching network gives a superior PCE compared with state of the art also for lower resistive loading. By omitting the matching network and directly, conjugate impedance matching the antenna to the rectifier, the PCE may be further increased and the rectenna size reduced as it is demonstrated with a rectenna prototype measuring only 0.028 squared wavelengths at 868 MHz and demonstrating a PCE of 55% for a -10 dBm RF input power level.
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Citations
Novel Compact and Broadband Frequency-Selectable Rectennas for a Wide Input-Power and Load Impedance Range
TL;DR: A novel design method for a rectenna suitable for a wide range of selectable operating frequency band, input power level, and load impedance is presented without using complex impedance matching networks.
103
Millimeter-Wave Power Harvesting: A Review
Mahmoud Wagih,Alex S. Weddell,Steve Beeby +2 more
- 01 Oct 2020
TL;DR: This article reviews the recent advances in mmWave rectenna design at a component- and system-level and provides an overview of future antenna design challenges and research directions for mmWave power harvesting.
Omnidirectional Dual-Polarized Low-Profile Textile Rectenna With Over 50% Efficiency for Sub- μ W/cm 2 Wearable Power Harvesting
TL;DR: A fully textile rectenna for ultralow-power sub-LaTeX/cm2 applications and efficiently receives power from mismatched polarization and with a 360° half-power beamwidth.
Meshed High-Impedance Matching Network-Free Rectenna Optimized for Additive Manufacturing
Mahmoud Wagih,Alex S. Weddell,Steve Beeby +2 more
- 16 Nov 2020
TL;DR: In this article, an electrically small folded dipole antenna design with a scalable impedance for directly matching energy harvesting rectifiers is proposed. But the performance of the proposed rectenna is limited.
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Hubregt J. Visser,Ruud Vullers +1 more
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TL;DR: The feasibility of harvesting is discussed, leading to the conclusion that RF energy transport is preferred for powering small sized sensors by radio-frequency energy harvesting or transport.
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Co-Design of a CMOS Rectifier and Small Loop Antenna for Highly Sensitive RF Energy Harvesters
TL;DR: In this paper, a design method for the co-design and integration of a CMOS rectifier and small loop antenna and a complementary MOS diode is proposed to improve the harvester's ability to store and hold energy over a long period of time during which there is insufficient power for rectification.
350
A Compact Dual-Band Rectenna Using Slot-Loaded Dual Band Folded Dipole Antenna
Kyriaki Niotaki,Sangkil Kim,Seong Heon Jeong,Ana Collado,Apostolos Georgiadis,Manos M. Tentzeris +5 more
TL;DR: In this article, a dual-band rectenna operating at 915 MHz and 2.45 GHz was proposed, which is optimized for low input power densities using harmonic balance (HB) simulation.
247
Energy Harvesting Circuit on a One-Sided Directional Flexible Antenna
Haruichi Kanaya,S. Tsukamaoto,Takuya Hirabaru,Daisuke Kanemoto,Ramesh K. Pokharel,Keiji Yoshida +5 more
TL;DR: In this article, the authors proposed an energy harvesting circuit on a one-sided directional flexible planar antenna, which is composed of a flexible antenna with an impedance matching circuit, a resonant circuit, and a booster circuit for converting and boosting radio frequency power into a dc voltage.
125
Power Waves and Conjugate Matching
TL;DR: New physical reasoning of power waves is given starting from the principle of conjugate matching and a new formula for the reference impedances for a two-port system is given such that the system is simultaneously conjugates matched for both ports.
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