https://scholars.lib.ntu.edu.tw/handle/123456789/580857
標題: | Implementation of rotman lens beamformer for relatively flexible multi-beam radiation control by electrically large phased arrays of antennas | 作者: | Chang C.-Y HSI-TSENG CHOU |
關鍵字: | Antenna feeders; Antenna lobes; Antenna phased arrays; Beam forming networks; Beamforming; Multibeam antennas; Beamwidth control; Electrically large; Multibeams; Orthogonal beamforming; Phase distortions; Radiation controls; Rotman lens; Sidelobe levels; Lens antennas | 公開日期: | 2018 | 卷: | 2018 | 期: | CP741 | 來源出版物: | IET Conference Publications | 摘要: | This paper examines the implementation of Rotman lens beamformer to excite an electrically large phased array of antennas for multi-beam radiations. The goal is to relieve the number limitation of antenna ports arising from the limited surface profile of Rotman lens. Thus the confinement of sidelobe levels and beamwidths can be performed by increasing the array size and tapering the amplitudes of excitations. The radiation discrepancy due to the phase distortion by the defocused feeds will be also examined to justify the valid feeding area for orthogonal beamforming. Theoretical concepts will be first discussed with numerical examples shown to validate the feasibility and applicable scope. ? Institution of Engineering and Technology.All Rights Reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057309198&partnerID=40&md5=bdd5710ac7f5b5c3e286477dac0414fb https://scholars.lib.ntu.edu.tw/handle/123456789/580857 |
顯示於: | 電機工程學系 |
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