On the minimization of side-lobes in large antenna arrays for Microwave Power Transmission

Shishkov, Blagovest; Shinohara, Naoki; Matsumoto, Hiroshi; Hashimoto, K.; Mitani, Tomohiko

doi:10.1109/ursigass.2011.6050553

Cited by 10 publications

(10 citation statements)

References 6 publications

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“…where α 2 = A T A R (λd) 2 , A T is the aperture area of the transmitting antenna, A R the aperture area of the receiving antenna, and λ and d the wavelength and the distance between transmitter and receiver, respectively. Several methods have been proposed to maximize the beam efficiency such as weighting techniques for large antenna arrays including edge tapering techniques [140], micro-strip printed reflect-arrays in which they combine the advantages of conventional phased arrays with their beam steering capabilities and the high gain from reflector antennas [141,142], etc. After the signal is received, it should be converted back to DC, using an RF-DC converter, which is mainly composed of a matching network, a rectifier element, and a DC pass filter.…”

Section: Far-field Wptmentioning

confidence: 99%

Electromagnetic Field Based WPT Technologies for UAVs: A Comprehensive Survey

Nguyen

Truong

et al. 2020

Electronics

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Wireless power transfer (WPT) techniques are important in a variety of applications in both civilian and military fields. Unmanned aerial vehicles (UAVs) are being used for many practical purposes, such as monitoring or delivering payloads. There is a trade-off between the weight of the UAVs or their batteries and their flying time. Their working time is expected to be as long as possible. In order to support the UAVs to work effectively, WPT techniques are applied with UAVs to charge secondary energy supply sources in order to increase their working time. This paper reviews common techniques of WPT deployed with UAVs to support them while working for different purposes. Numerous approaches have been considered to illustrate techniques to exploit WPT techniques. The charging distances, energy harvesting techniques, electronic device improvements, transmitting issues, etc., are considered to provide an overview of common problems in utilizing and charging UAVs. Moreover, specific problems are addressed to support suitable solutions with either techniques or applications for UAVs.

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Section: Far-field Wptmentioning

confidence: 99%

Electromagnetic Field Based WPT Technologies for UAVs: A Comprehensive Survey

Nguyen

Truong

et al. 2020

Electronics

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“…The research results were referred in URSI White paper on SPS. The other approach to coexistent both beam forming without grating lobes and high efficiency array, we proposed new random array to suppress grating lobes and to increase beam collection efficiency simultaneously (Shinohara, 2008) (Shishkov, 2009) (Shishkov, 2011). In conventional random array, we can suppress grating lobes with large antenna spacing like a magnetron array.…”

Section: Microwave Power Transmissionmentioning

confidence: 99%

Wireless Power Transmission in Ursi

Shinohara¹

2013

Proceedings of the 2nd International Conference on Telecommunications and Remote Sensing

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In URSI, Inter-Commission Working Group on Solar Power Satellites (SPS) was established in 2002 and the URSI Board has been working on writing and reviewing an URSI White Paper on SPS, which was published on June 2007, because the SPS is one of huge application of radio science. One of important application of the radio science on the SPS is a wireless power transmission (WPT) via microwave (microwave power transmission ; MPT). At first, the WPT walked along with the SPS. But now we have some kinds of the WPT and its commercial applications. One of important application of the WPT is an energy harvesting. The other is MPT for the SPS. Some important researches are done as URSI activities in Japan. It is high efficiency rectenna development at low power and at wide band frequency. It is also high efficiency and low cost phased array for the MPT and the SPS. Some of them were published in URSI conference. In this paper, I will show mainly present status of the WPT in Japan and in the world and will also show a relationship between the WPT and the URSI activities.

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“…The phased antenna array is used widely in the MPT system, 3,4 and lots of methodologies have been reported to enhance the power transmission efficiency (PTE) between transmitting array and receiving array, 4 such as uniform weighting and spacing, 5 closed-form design techniques, 6 combined stochastic algorithm, 7,8 and subarray-based arrangements. 9 The application of retro-directive antenna arrays is proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

A new design of microstrip antenna array for microwave power transmission

Zhong

Yang

Liu

et al. 2018

Micro & Optical Tech Letters

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An improved method used to design high transmission efficiency microwave power transmission (MPT) antenna array is proposed in this article. In this method, the constraint of the transmitting element arrangement is removed by defining the power transmission efficiency different from previous works, and the coupling between transmitting elements is included completely. Two 4 3 4 antenna arrays working at 5.8 GHz are designed and fabricated to verify it. These two arrays are used in two MPT systems, in each system the transmitting array and receiving array have the same geometry. The measured transmission efficiencies of antenna array 1 and array 2 are 65% and 58% when the transmission distances are 10 cm and 20 cm, respectively. K E Y W O R D S antenna array, coupling, feeding network, microwave power transmission, transmission efficiency

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On the minimization of side-lobes in large antenna arrays for Microwave Power Transmission

Cited by 10 publications

References 6 publications

Electromagnetic Field Based WPT Technologies for UAVs: A Comprehensive Survey

Electromagnetic Field Based WPT Technologies for UAVs: A Comprehensive Survey

Wireless Power Transmission in Ursi

A new design of microstrip antenna array for microwave power transmission

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