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Four-arm Spiral Antennas 作者:Corzine, Robert G.; Mosko, Joseph A.; 出版年:1990-12 页数:280 定价:$ 154.81 ISBN:9780890063484 豆瓣评分 目前无人评价 写笔记 写书评 加入购书单 分享到
Multi-mode four-arm Archimedean spiral antennas, backed by partially-filled absorber, are investigated. A low-profile structure with an embedded balun is realized to produce balanced spiral modes for both broadside and conical radiation patterns over GPS frequency bands. Prototype antennas are developed...
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Single-layer and bilayer four-arm spiral antennas and their feeding methods for Mode 1 operation are discussed in this article. Important design parameters... K Kim,N Kefauver,M Buck,... - International Journal of RF and Microwave Computer-Aided Engineering 被引量: 2发表: 2012年 Ultra-Wideban...
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Chou, H.-T., W.-J. Liao, and Y.-C. Hou, "Hybrid applications of RF lines and absorbing material to optimize the radiation patterns of four-arm spiral antennas in the direction finding system," J. of Electromagn. Waves and Applications, Vol. 21, No. 1, 81-96, 2007....
Four-star eight-frequency active measuring antenna GNSS UAV four-arm spiral F9P navigation Helical antenna $19.00 - $25.00 Min. order: 1 piece High precision Driving test monitoring GPS multi frequency antenna strong signal GNSS antenna $37.00 - $40.00 Min. order: 1 piece High-precision dri...
microwave antennasbroadband antennasantenna feedsangular momentumantenna radiation patternsfeeding portcorresponding spiral armOAM antenna5.8GHznear‐field phase distributionsAn orbital angular momentum (OAM) antenna based on four-arm planar spiral for multiple OAM modes generation is proposed in this Letter. ...
et al. A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar. Nat Astron 7, 557–568 (2023). https://doi.org/10.1038/s41550-023-01899-w Download citation Received16 September 2022 Accepted18 January 2023 Published27 February 2023 Issue DateMay 2023 ...