Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/69499
Title: Beam steering with high front-to-back ratio and high directivity on small platforms using decoupled antenna pairs
Authors: Tang, X. 
Mouthaan, K. 
Coetzee, J.C.
Keywords: beam steering
compact array
mutual coupling
phase shifter
Phased array
Issue Date: 2011
Citation: Tang, X.,Mouthaan, K.,Coetzee, J.C. (2011). Beam steering with high front-to-back ratio and high directivity on small platforms using decoupled antenna pairs. Asia-Pacific Microwave Conference Proceedings, APMC : 1326-1329. ScholarBank@NUS Repository.
Abstract: Beam steering with high front-to-back ratio and high directivity on a small platform is presented. Two closely spaced antenna pairs with eigenmode port decoupling are used as the basic radiating elements. Two orthogonal radiation patterns are obtained for each antenna pair. High front-to-back ratio and high directivity are achieved by combining the two orthogonal radiation patterns. With an infinite ground plane, a simulated front-to-back ratio of 21 dB and a directivity of 9.8 dB can be achieved. Beam steering, at the expense of a slight decrease in directivity, is achieved by placing the two antenna pairs 0.5λ apart. The simulated half power beamwidth is 58°. A prototype is designed and the 2-D radiation patterns are measured. The realized prototype with one-bit phase shifter supports three directions of beam steering. The measured half power beamwidth is 46°, 48°, and 50° for the three respective beam directions. The measured front-to-back ratio in azimuth plane is 8.5 dB, 8.0 dB and 7.6 dB, respectively. © 2011 Engineers Australia.
Source Title: Asia-Pacific Microwave Conference Proceedings, APMC
URI: http://scholarbank.nus.edu.sg/handle/10635/69499
ISBN: 9780858259744
Appears in Collections:Staff Publications

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