A Novel Way to Improve the Bandwidth of TWTA Linearizer

Yong Fei Wang; Jing Yuan Xu; Kai Zheng; Da Long Lv; Dong Fang Zhou

doi:10.4028/www.scientific.net/AMM.614.526

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 614A Novel Way to Improve the Bandwidth of TWTA...

A Novel Way to Improve the Bandwidth of TWTA Linearizer

Abstract:

This paper gives a detailed discussion about the gain ripple effect. Using gain equalization to compensate for the gain ripple and improve the working band of the Linearizer-TWTA system is proposed. A Ku-band equalized RF predistortion linearizer for linearizing the distortion effects of travelling wave tube amplifiers (TWTAs) is proposed. Per-tone and two-tone test experimental results show that the equalizer has improved the working band of the predistortion linearizer. A minimum of 4 dB of AM-AM improvement is made within the whole bandwidth of the TWTA, with a 20° phase shift improvement. And the maximum C/IM improvement after equalization is 3.5dB.

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Periodical:

Applied Mechanics and Materials (Volume 614)

Pages:

526-529

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.614.526

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Online since:

September 2014

Authors:

Yong Fei Wang*, Jing Yuan Xu, Kai Zheng, Da Long Lv, Dong Fang Zhou

Keywords:

Gain Ripple, Predistortion, TWTA Linearization

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* - Corresponding Author

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