Journal ArticleDOI
5.8-GHz circularly polarized rectifying antenna for wireless microwave power transmission
B. Strassner,Kai Chang +1 more
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TLDR
In this paper, a circularly polarized (CP) high-gain high-efficiency rectifying antenna (rectenna) was reported, which can be rotated and still maintain a constant dc output voltage.Abstract:
This paper reports a new circularly polarized (CP) high-gain high-efficiency rectifying antenna (rectenna). The CP rectenna can be rotated and still maintain a constant dc output voltage. The high-gain antenna has an advantage of reducing the total number of rectenna elements to cover a fixed area. The rectenna is etched on Rogers Duroid 5870 substrate with /spl epsi//sub r/=2.33 and 10 mil thickness. A high-gain dual-rhombic-loop antenna and a reflecting plane are used to achieve a CP antenna gain of 10.7 dB and a 2:1 voltage standing-wave ratio bandwidth of 10%. The rectenna's pattern has an elliptical cross section with orthogonal beamwidths of 40/spl deg/ and 60/spl deg/. The rectenna circuit has a coplanar stripline band-reject filter that suppresses the re-radiated harmonics by 20 dB. A highly efficient Schottky diode is used for RF-to-dc conversion with an efficiency of approximately 80% for an input power level of 100 mW and a load resistance of 250 /spl Omega/.read more
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Journal ArticleDOI
RF Energy Harvesting and Transport for Wireless Sensor Network Applications: Principles and Requirements
Hubregt J. Visser,Ruud Vullers +1 more
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.
Patent
Meta-element antenna and array
TL;DR: An antenna having at least one main element and a plurality of parasitic elements is considered to have a coupling element or devices associated with them, the coupling elements or devices being tunable to control the degree of coupling between adjacent elements.
Journal ArticleDOI
Design of a High-Efficiency 2.45-GHz Rectenna for Low-Input-Power Energy Harvesting
TL;DR: In this article, a high-efficiency 2.45 GHz rectenna with a simple structure and high gain of 8.6 dBi is proposed for the rectenna, which can harvest low input RF power effectively.
Journal ArticleDOI
Microwave Power Transmission: Historical Milestones and System Components
B. Strassner,Kai Chang +1 more
TL;DR: This paper attempts to reveal, in adequate chronological detail, many of the MPT milestones reached over the past 50 years, including those related to SSP.
Journal ArticleDOI
Array Designs for Long-Distance Wireless Power Transmission: State-of-the-Art and Innovative Solutions
TL;DR: This paper is aimed at reviewing the array design approaches proposed in the state of the art for long-range wireless power transmission, highlighting the latest advances and innovative solutions as well as envisaging possible future trends of the research in this area.
References
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Journal ArticleDOI
The History of Power Transmission by Radio Waves
TL;DR: The history of power transmission by radiowaves is reviewed from Heinrich Hertz to the present time with emphasis upon the free-space microwave power transmission era beginning in 1958 as mentioned in this paper.
Journal ArticleDOI
Design and experiments of a high-conversion-efficiency 5.8-GHz rectenna
J.O. McSpadden,L. Fan,Kai Chang +2 more
TL;DR: In this paper, a high-efficiency rectenna element has been designed and tested at 5.8 GHz for applications involving microwave-power transmission, which achieves an RF-to-DC conversion efficiency of 82% at an input power level of 50 mW and 327 /spl Omega/ load.
Journal ArticleDOI
Theoretical and experimental development of 10 and 35 GHz rectennas
T.-W. Yoo,Kai Chang +1 more
TL;DR: In this paper, a 35 GHz rectenna with 39% conversion efficiency was developed using a microstrip dipole antenna and a commercially available mixer diode, which was demonstrated using this diode at 10 GHz.
Book
Tesla: Man Out of Time
TL;DR: The hydraulic control circuit of the present invention is preferably contemplated for operating a push-pull coupling to permit selective tandem operation of two vehicles.
Journal ArticleDOI
A compact dual-polarized 8.51-GHz rectenna for high-voltage (50 V) actuator applications
TL;DR: In this paper, a dual-polarized rectenna capable of producing a 50-V output voltage that can be used for driving mechanical actuators is described, and a circuit topology that allows the output of multiple rectenna elements to be combined in order to step up the output voltage.
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