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title24GHz 用レクテナの大電力化
Other TitleDevelopment of High Power 24GHz Rectenna
Author(jpn)篠原, 真毅
Author(eng)Shinohara, Naoki
Author Affiliation(jpn)京都大学生存圏研究所
Author Affiliation(eng)Research Institute for Sustainable Humanosphere, Kyoto University
Issue Date2011-05-17
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
Publication title30th ISAS Space Energy Symposium
Publication date2011-05-17
AbstractLast year, we have proposed 24GHz satellite MPT experiment for the SPS. The biggest weak point of the SPS is its huge size which is decided by the theory of microwave beaming andeconomical reasons. The same weak point is on the satellite MPT experiment as the first step to the SPS. We can not transmit enough microwave power with GHz order frequency from the experimental satellite to ground. It is because our proposal of 24GHz satellite MPT experiment.We revised the 24GHz rectenna to increase the RF-DC conversion efficiency. We add the adjust stub and resonator after the diode. The resonator is put after the adjust stub and consists of high impedance line (120 Omega) and DC pad. As a result, the RF-DC conversion efficiency increases to 54.2% at 130mW, 400Omega, 5.6V. In next step, we use 12-way power divider between the antenna and the rectifying circuits to increase a received power. We can receive and rectify twelve times larger power in the new rectenna than in one rectenna element. The return loss of the developed 12-way power divider is -19.1 dB and the pass losses are -0.15 dB of the minimum and -0.46 dB of the maximum. We developed 500mW rectenna at 24GHz with the power divider. The RF-DC conversion efficiency decreases to 43.6% at 500mW, 40.2Omega. In this case, VSWR of the waveguide is 2.25 and it is larger than in the previous experiments. We consider this is one of the reasons of low efficiency.We have to realize the SPS and its experimental satellite at all costs for future. We hope this experimental results lead to the experimental satellite for theSPS.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: The thirtieth Space Energy Symposium (February 25, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)), Sagamihara, Kanagawa Japan
Note: One CD-ROM
形態: カラー図版あり
会議情報: 第30回宇宙エネルギーシンポジウム(2011年2月25日, 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス), 相模原市, 神奈川県
形態: CD-ROM1枚
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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