Wideband matching technology used for predistortion linearization

Wang Yongfei; Han Peisheng; Hu Qing; Chen Xinpeng; Zhou Dongfang

doi:10.11884/HPLPB201931.190128

Volume 31 Issue 12

Dec. 2019

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Wang Yongfei, Han Peisheng, Hu Qing, et al. Wideband matching technology used for predistortion linearization[J]. High Power Laser and Particle Beams, 2019, 31: 123003. doi: 10.11884/HPLPB201931.190128

Citation:

Wang Yongfei, Han Peisheng, Hu Qing, et al. Wideband matching technology used for predistortion linearization[J]. High Power Laser and Particle Beams, 2019, 31: 123003. doi: 10.11884/HPLPB201931.190128

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Wideband matching technology used for predistortion linearization

doi: 10.11884/HPLPB201931.190128

1.
Information Engineering University, Zhengzhou 450001, China
2.
The North Institute of Computing, Beijing 100161, China
3.
Warrant Officer School, Army Artillery Air Defense Academy, Shenyang 110000, China

Received Date: 2019-04-24
Rev Recd Date: 2019-08-15
Publish Date: 2019-12-01

Abstract

Abstract

Due to the gain fluctuation and nonlinear characteristic variation of the TWT amplifier chain, predistorter cannot compensate the nonlinearities at different frequencies within the working band, thus nonlinear mismatch might occur and nonlinearity of TWTA could get worse at some frequencies. The wideband linear match theory of predistorter with TWTA is put forward, and the influence of nonlinear mismatch is discussed. Predistorter cascaded with gain compensation unit can flatten the gain fluctuation and match the nonlinearity of TWTA, truly broaden the linear working band of LTWTA.
- predistortion,
- travelling wave tube amplifier,
- nonlinearity match,
- wideband match,
- cascade gain compensation

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References(14)

References

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