卫星通信系统中固态功率放大器的一种新型模拟线性化器

2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Pub Date : 2018-05-07 DOI:10.1109/ICMMT.2018.8563666

Zheng Liu, Cheng Yan, Gang Liu, Qi Li, Yuqing Wu, G. Xiao

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引用次数: 2

摘要

本文研制了一种新型的、紧凑的、低损耗的模拟预失真线性器，该线性器采用两个并联肖特基势垒二极管。该线性器用于补偿卫星通信系统中固态功率放大器的非线性。分析了其基本原理，给出了相应的等效电路模型。然后，讨论了期望的线性器随不同电路参数的非线性特性。最后，对卫星SSPA在输出功率达到最大时的互调失真进行了测量和比较。结果表明，该放大器的非线性特性得到了修正，调制间失真得到了显著改善。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Novel Analog Linearizer for Solid-State Power Amplifier in Satellite Communication System

In this paper, a new, compact and low loss analog predistortion linearizer using two parallel Schottky barrier diodes (SBDs) is developed. This linearizer will be used to compensate the nonlinearity of the solid-state power amplifier (SSPA) in satellite communication system. The fundamental principle is analyzed and its corresponding equivalent circuit model is given. Then, the desired non-linear characteristics of the linearizer versus different circuit parameters have been discussed. Finally, the intermodulation distortion of a satellite SSPA with and without the designed analog linearizer when it delivers maximum output power have been measured and compared. The results show that the nonlinear characteristics of the amplifier has been corrected and its inter-modulation distortion has been significantly improved.

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2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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