The History of Power Transmission by Radio Waves

Brown, W. C.

doi:10.1109/tmtt.1984.1132833

Cited by 1,384 publications

(616 citation statements)

References 12 publications

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“…Finally, while we are one of the first to demonstrate charging of ground sensors from an aerial robot, the reverse problem of how to power an aerial vehicle was looked at in 1964 to wirelessly power a flying helicopter [14] and in 2011 was used to enable a 12 hour, record-length quad-rotor flight [15]. …”

Section: Related Workmentioning

confidence: 99%

Experimental Analysis of a UAV-Based Wireless Power Transfer Localization System

Mittleider

Griffin

Detweiler

2015

Experimental Robotics

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Abstract. Sensors deployed in remote locations provide unprecedented amounts of data, but powering these sensors over long periods remains a challenge. In this paper, we develop and present a UAV-based wireless power transfer system. We discuss design considerations and present our system that allows a UAV to fly to remote locations to charge hard to access sensors. We analyze the impact of different materials on the wireless power transfer system. Since GPS does not provide sufficient accuracy, we develop and experimentally characterize a relative localization algorithm based on sensing the magnetic field of the power transfer system and optical flow that allows the UAV to localize the sensor with an average error of 15 cm to enable the transfer of on average 4.2 W . These results overcome some of the practical challenges associated with wirelessly charging sensors with a UAV and show that UAVs with wireless power transfer systems can greatly extend the life of remotely deployed sensors.

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Section: Related Workmentioning

confidence: 99%

Experimental Analysis of a UAV-Based Wireless Power Transfer Localization System

Mittleider

Griffin

Detweiler

2015

Experimental Robotics

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“…The search for OR effect in metallic optical antennas was started in 1964, when Brown of the Raytheon Company demonstrated the first flight of a microwave-powered helicopter using rectenna [22], a high up to 90% efficiency was obtained for a rectenna operating at single microwave frequency in 1976 [23]. Generally speaking, the OR effect could achieve up to 80 percent efficiency of energy conversion and power transmission in microwave range 300 MHz to 300 GHz, and typical antenna structure size was around few millimeters.…”

Section: Review Of Optical Rectification (Or) Effectmentioning

confidence: 99%

Plasmonic Rectenna for Efficient Conversion of Light into Electricity

Chen¹,

Liu²,

Alemu³

2012

Plasmonics - Principles and Applications

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“…A rectenna, which converts RF energy to DC power, is a key component of free-space microwave power transmission (MPT) systems for the application of microwave powered unmanned aerial vehicles (UAVs) and space solar power satellite stations (SSPS) [1,2]. The constraints on the design of MPT systems are the choice of the operating frequency and the system configuration of the transmitter and receiver.…”

Section: Introductionmentioning

confidence: 99%

A Compact and Wideband Circularly Polarized Rectenna With High Efficiency at X-Band

Shin¹,

Seo²,

Choi³

et al. 2014

PIER

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Abstract-A new design for a compact and wideband circularly-polarized rectenna with high efficiency operating at X-band is proposed. A dual-slot coupled antenna excited by an H-shaped slot fed by a T-shaped microstrip is designed to yield wideband performance as a receiving array antenna. Rectifying circuit models for harmonic suppression circuit, impedance matching, DC-pass circuit, and DC return circuit at the input and output of the diode are built up and optimized to transfer the maximum power from the antenna to the load using an ADS circuit simulator. An RF-DC conversion efficiency of 71.9% is measured on the conditions of 300 Ω load, and 50.1 mW RF input power at 9.5 GHz operating frequency. For the proposed wideband rectenna, the efficiency of more than 50% is measured over a 1 GHz frequency bandwidth. The measured gain, axial ratio, and return loss of the circularly polarized antenna with a 4-element array are 11.2 dBi, 1.1 dB, and −16.4 dB, respectively. The reflection coefficient of the array antenna is measured at less than −10 dB over a wide frequency range of about 2 GHz. Using this antenna as transmitting (TX) and receiving (RX) radiators, the free-space power transfer capability of the rectenna is tested in free space to turn on an LED at 25 cm distance.

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The History of Power Transmission by Radio Waves

Cited by 1,384 publications

References 12 publications

Experimental Analysis of a UAV-Based Wireless Power Transfer Localization System

Experimental Analysis of a UAV-Based Wireless Power Transfer Localization System

Plasmonic Rectenna for Efficient Conversion of Light into Electricity

A Compact and Wideband Circularly Polarized Rectenna With High Efficiency at X-Band

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