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車載用衛星放送受信偏波切替導波管スロットアレーアンテナ
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- SAKAKIBARA Kunio
- Dept. of Electric and Electronic Eng. Tokyo Institute of Technology
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- KIMURA Yuichi
- Dept. of Electric and Electronic Eng. Tokyo Institute of Technology
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- HIROKAWA Jiro
- Dept. of Electric and Electronic Eng. Tokyo Institute of Technology
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- ANDO Makoto
- Dept. of Electric and Electronic Eng. Tokyo Institute of Technology
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- GOTO Naohisa
- Dept. of Electric and Electronic Eng. Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- A two-beam slotted leaky waveguide array for mobile reception of dual polarization DBS
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Description
アメリカでは175以上ものチャンネル数の衛星放送サービスが行われており、右旋・左旋の両偏波を用いて実現している。この用途に用いるアンテナとして、互いに異なる2偏波を左右対称な方向に放射することができるアンテナを、一層構造の導波管漏れ波アンテナで実現した。円偏波素子であるクロススロットをあけた漏れ波導波管の両端に給電導波管をとりつけ、漏れ波導波管内には両方向に電波が伝搬する。両者はそれぞれ天長から+45度、-45度の方向に互いに逆の偏波を放射する。2つの放射特性が等しくなるように、アンテナの構造は左右対称でなければならず、この条件で、効率が最大になるように、アンテナの設計を行った。12GHz帯で約30cm四方の大きさのアンテナを試作し、実験の結果、右旋偏波、左旋偏波のアンテナ効率はそれぞれ71%、64%となった。
A two-beam slotted leaky waveguide array for mobile reception of dual polarization DBS is realized in single layer structure. Two feed waveguides attached at both ends of cross-slotted radiating waveguides excite the leaky waves propagating in opposite directions. Each of them radiates either of two circularly-polarized waves in symmetrical beam directions. Balanced design of two beams for each polarization imposes symmetry in the array design of slots. The slot coupling distribution is optimized for the maximum gain under this symmetry condition. A model antenna in about 300 mm square is fabricated for experiments in 12 GHz band. Antenna efficiency of 71% and 64% are obtained for each beam in different polarizations.
Journal
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- IEICE technical report. Antennas and propagation
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IEICE technical report. Antennas and propagation 95 (414), 9-15, 1995-12-14
The Institute of Electronics, Information and Communication Engineers
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Details 詳細情報について
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- CRID
- 1573387452242696832
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- NII Article ID
- 110003247805
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- NII Book ID
- AN10060764
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- Text Lang
- en
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- Data Source
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- CiNii Articles