Beam steering with high front-to-back ratio and high directivity on small platforms using decoupled antenna pairs

Tang, Xinyi, Mouthaan, Koenraad, & Coetzee, Jacob Carl (2011) Beam steering with high front-to-back ratio and high directivity on small platforms using decoupled antenna pairs. In APMC2011 Proceedings, Melbourne Convention and Exhibition Centre, Melbourne, VIC, pp. 1326-1329.

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Beam steering with high front-to-back ratio and high directivity on a small platform is proposed. 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 groundplane, a front-to-back ratio of 21 dB with 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 was designed and the 2-D radiation patterns were measured. The prototype supports three directions of beam steering. The half power beamwidth was measured as 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.

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ID Code: 45688
Item Type: Conference Paper
Refereed: Yes
Keywords: phased array, beam steering, mutual coupling, compact array, phase shifter
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2011 [please consult the author]
Deposited On: 04 Sep 2011 23:30
Last Modified: 14 Jul 2017 08:01

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