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Proceedings Paper

On intermodulation beams of satellite DBF transmitting multibeam array antenna
Author(s): Hongmei Zhao; Huali Wang; Shanxiang Mu
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Paper Abstract

Digital beamforming (DBF) transmitting multibeam planar array antenna with nonlinear behaviors of solid-state power amplifiers (SSPA) is discussed. This paper investigates the intermodulation beams produced by the nonlinearity characteristics of the SSPA with multiple carrier components. The Shimbo model is simplified to describe the nonlinear behaviors of SSPA. The optimal SSPA input back-off (IBO) point which is given the desired the carrier and the intermodulatin ratio (C/IM) is simulated. And the tradeoffs between linearity and efficiency of the power amplifier which influence this IBO is also discussed, helping to selecting suitable SSPA device and reducing the dc power consumption in satellite array antenna system.

Paper Details

Date Published: 10 November 2007
PDF: 6 pages
Proc. SPIE 6795, Second International Conference on Space Information Technology, 67957N (10 November 2007); doi: 10.1117/12.775463
Show Author Affiliations
Hongmei Zhao, Nanjing Univ. of Science & Technology (China)
Huali Wang, PLAUST (China)
Shanxiang Mu, Nanjing Univ. of Science & Technology (China)


Published in SPIE Proceedings Vol. 6795:
Second International Conference on Space Information Technology

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