Design of Q-band wideband linearizer

Li Baojian; Qu Bo; Xia Lei; Han Fei

doi:10.11884/HPLPB202133.200206

Volume 33 Issue 2

Jan. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(2): 023004

Li Baojian, Qu Bo, Xia Lei, et al. Design of Q-band wideband linearizer[J]. High Power Laser and Particle Beams, 2021, 33: 023004. doi: 10.11884/HPLPB202133.200206

Citation:

Li Baojian, Qu Bo, Xia Lei, et al. Design of Q-band wideband linearizer[J]. High Power Laser and Particle Beams, 2021, 33: 023004. doi: 10.11884/HPLPB202133.200206

Li Baojian, Qu Bo, Xia Lei, et al. Design of Q-band wideband linearizer[J]. High Power Laser and Particle Beams, 2021, 33: 023004. doi: 10.11884/HPLPB202133.200206

Citation:

Li Baojian, Qu Bo, Xia Lei, et al. Design of Q-band wideband linearizer[J]. High Power Laser and Particle Beams, 2021, 33: 023004. doi: 10.11884/HPLPB202133.200206

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Design of Q-band wideband linearizer

doi: 10.11884/HPLPB202133.200206

1.
The Twelfth Institute of China Electronics Technology Group Corporation, Beijing 100016, China
2.
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received Date: 2020-07-18
Rev Recd Date: 2020-10-22
Publish Date: 2021-01-07

Abstract

Abstract

At present, China’s Q/V band low orbit satellite internet project is being vigorously carried out, broadband communications are gradually developing. But the domestic linearization technology is generally limited to narrow band, the related research is not mature. Therefore, it is necessary to design broadband linearizer as soon as possible. In this paper, a Q-band linearizer of traveling-wave tube amplifier (TWTA) for satellite communication has been designed using an analog predistortion technique suitable for space environment. Using the new microstrip transmission structure and the Schottky diode, the ultra-wide instantaneous frequency band can be linearized in the millimeter-wave frequency band. The amplitude distortion and phase distortion of TWTA are greatly improved in the 38−43 GHz (5 GHz) instantaneous frequency band. The linearizer has an in-band amplitude gain of about 4.8−7.2 dB and a phase expansion of about 70°−88° in the input power range of −17−13 dBm. Compared with other linearizers of the same type, this linearizer has higher corresponding frequency and can realize stable linearization of TWTA in a wide instantaneous frequency band.
- traveling-wave tube amplifier,
- linearization,
- analog predistortion,
- broadband,
- directional coupler,
- defected ground structure

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References(15)

References

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