Isosceles-Trapezoidal-Distribution Edge Tapered Array Antenna with Unequal Element Spacing for Solar Power Satellite
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概要
- 論文の詳細を見る
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.
- （社）電子情報通信学会の論文
- 2008-02-01
著者
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Mitani Tomohiko
Laboratory Of Applied Radio Engineering For Humanosphere Rish Kyoto University
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Mitani Tomohiko
Research Institute For Sustainable Humanosphere Kyoto Univ.
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Shinohara Naoki
Laboratory Of Applied Radio Engineering For Humanosphere Rish Kyoto University
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Shinohara N
Kyoto Univ. Uji‐shi Jpn
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Shinohara Naoki
Radio Science Center Of Space And Atmosphere Kyoto University
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Shinohara Naoki
Research Institute For Sustainable Humanosphere Kyoto University
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Mitani Tomohiko
Research Institute For Sustainable Humanosphere (rish) Kyoto University
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Matsumoto H
Department Of Electronics And Bioinformatics Science And Technology Meiji University
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BAKI A.
Research Institute for Sustainable Humanosphere (RISH), Kyoto University
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HASHIMOTO Kozo
Research Institute for Sustainable Humanosphere (RISH), Kyoto University
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MATSUMOTO Hiroshi
Research Institute for Sustainable Humanosphere (RISH), Kyoto University
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Baki A.
Research Institute For Sustainable Humanosphere Kyoto University
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Hashimoto Koichi
Research Institute For Sustainable Humanosphere Kyoto University
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Shinohara Naoki
Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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BAKI A.K.M.
Research Institute for Sustainable Humanosphere (RISH), Kyoto University
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