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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
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Investigation of four-arm Archimedean spiral antennas with a built-in balun for balanced multi-mode operations in GPS applicationscircular polarizationlow-profile antennahigher order modesGPS systemsMulti-mode four-arm Archimedean spiral antennas, backed by partially-filled absorber, are investigated. A ...
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展开 关键词: antenna feeds boundary integral equations coaxial waveguides coplanar waveguides finite element analysis slot antenna arrays spiral antennas 2nd mode 4-arm equiangular slot spiral antenna Ansoft HFSS FE-BI first higher order mode flexibility in-house fin DOI...
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. ...
We report the discovery of a Keplerian accretion disk with a spatially resolved four-arm spiral pattern around G358.93-0.03-MM1. This result positively implicates disk accretion and spiral arm instabilities into the episodic accretion high-mass star formation paradigm. This is a preview of ...