On intermodulation beams of satellite DBF transmitting multibeam array antenna

Hongmei Zhao; Huali Wang; Shanxiang Mu

doi:10.1117/12.775463

10 November 2007 On intermodulation beams of satellite DBF transmitting multibeam array antenna

Hongmei Zhao, Huali Wang, Shanxiang Mu

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67957N (2007) https://doi.org/10.1117/12.775463
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

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.

Citation Download Citation

Hongmei Zhao, Huali Wang, and Shanxiang Mu "On intermodulation beams of satellite DBF transmitting multibeam array antenna", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67957N (10 November 2007); https://doi.org/10.1117/12.775463

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