Some peculiarities of the wave beams in wireless power transmission

Garmash, V. R.; Katsenelenbaum, B. Z.; Shaposhnikov, S. S.; Tioulpakov, V. N.; Vaganov, R. B.

doi:10.1109/62.722419

Cited by 10 publications

(8 citation statements)

References 1 publication

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“…The scattering matrix [S] is obtained after simulation of the MPT array model without feeding network, then the maximal transmission efficiency and the optimized amplitude and phase distributions are calculated by using (6). The PTE of system 1 reaches 87%, while the PTE of system 2 is 84%.…”

Section: S I M Ula Ti On An D M Eas U Rem Ent R Es Ul Tsmentioning

confidence: 99%

“…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%

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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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Section: S I M Ula Ti On An D M Eas U Rem Ent R Es Ul Tsmentioning

confidence: 99%

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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“…The wireless power transmission (WPT) technique attracts lots of interests and efforts for decades, because of its appealing advantages of wire reduction and some other potential applications. There are three main WPT techniques, the electromagnetic coupling [1,2], the magnetic resonant [3,4] and the microwave power transmission (MPT) [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The electromagnetic coupling and the magnetic resonant work in a short range and get a high efficiency (up to 90%), while the MPT could transmit power for a long distance.…”

Section: Introductionmentioning

confidence: 99%

“…Beamforming technology has been used widely in MPT. Analytical works [6,7] and numerical methodologies [8][9][10][11][12][13][14][15][16][17] such as combined stochastic algorithm [12,13] have been reported to enhance the MPT efficiency. The application of retro-directive antenna arrays is proposed in [14,15,18] and MPT efficiency in the two-dimensional case is investigated by simulations [15].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of antenna array for multiple targets microwave power transmission with precise power division ratio control

Zhong

Yang

Liu

et al. 2018

IET Microwaves, Antennas & Propagation

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A novel method used to design multiple targets microwave power transmission antenna array that could transmit power wirelessly to discrete targets with different power division ratios is introduced in this study. The maximal transmission efficiency and the precise power division ratio could be achieved simultaneously by utilising the basis functions, which are optimised for high‐transmission efficiency, and the power division ratio is achieved precisely by investigating the transmission coefficients related to each basis function carefully. Two antenna arrays working at 2.45 GHz are designed and fabricated to verify the method. The power division ratios of array 1 and array 2 are designed to be 1:1 and 1:2 when the transmission distance is 10 cm, and the measured results are 1:1 and 1:2.1, respectively.

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“…A new approach of designing Chebyshev array has been presented in [16] where some new equations have been derived to estimate the excitation currents. Though the best form of amplitude distribution is known to be the Gaussian at the same time it has the demerits of poor use of radiating antenna surface [17] and the references there in]. One possible solution is described in [18] by introducing discontinuous antenna radiators distribution.…”

Section: Introductionmentioning

confidence: 99%

Isosceles-Trapezoidal-Distribution Edge Tapered Array Antenna with Unequal Element Spacing for Solar Power Satellite

Baki

Hashimoto

Shinohara

et al. 2008

IEICE Transactions on Communications

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The Earth will require sustainable electricity sources equivalent to 3 to 5 times the commercial power presently produced by 2050. Solar Power Satellite (SPS) is one option for meeting the huge future energy demand. SPS can send enormous amounts of power to the Earth as the form of microwave (MW). A highly efficient microwave power transmission (MPT) system is needed for SPS. A critical goal of SPS is to maintain highest Beam Efficiency (BE) because the microwaves from SPS will be converted to utility power unlike the MW from communication satellites. Another critical goal of SPS is to maintain Side Lobe Levels (SLL) as small as possible to reduce interference to other communication systems. One way to decrease SLL and increase BE is the edge tapering of a phased array antenna. However, tapering the excitation requires a technically complicated system. Another way of achieving minimum SLL is with randomly spaced element position but it does not guarantee higher BE and the determination of random element position is also a difficult task. Isosceles Trapezoidal Distribution (ITD) edge tapered antenna was studied for SPS as an optimization between full edge tapering and uniform amplitude distribution. The highest Beam Collection Efficiency (BCE) and lowest SLL (except maximum SLL) are possible to achieve in ITD edge tapering and ITD edge tapered antenna is technically better. The performance of ITD is further improved from the perspective of both Maximum Side Lobe Level (MSLL) and BE by using unequal spacing of the antenna elements. A remarkable reduction in MSLL is achieved with ITD edge tapering with Unequal element spacing (ITDU). BE was also highest in ITDU. Determination of unequal element position for ITDU is very easy. ITDU is a newer concept that is experimented for the first time. The merits of ITDU over ITD and Gaussian edge tapering are discussed.

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Some peculiarities of the wave beams in wireless power transmission

Abstract: Some wave beam peculiarities which usually are wasted are useful in Wireless Power Transmission Systems. These peculiarities: the focussing of the beam; the taper distribution of the radiating field; and the discontinuous antenna are discussed in this paper.

Cited by 10 publications

References 1 publication

A new design of microstrip antenna array for microwave power transmission

A new design of microstrip antenna array for microwave power transmission

Optimal design of antenna array for multiple targets microwave power transmission with precise power division ratio control

Isosceles-Trapezoidal-Distribution Edge Tapered Array Antenna with Unequal Element Spacing for Solar Power Satellite

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