ANALOG PREDISTORTION LINEARIZER ON REDUCING CORRECTED AMPLITUDE OVERSHOOT |
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Authors: | Hu Boxiong Wang Gang Hao Baoliang Tang Kangsong |
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Affiliation: | Institue of Electronics, Chinese Academy of Science, Beijing 100190, China |
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Abstract: | This paper presents a dual-nonlinear branch linearizer for reducing the corrected amplitude overshoot of conventional single nonlinear branch linearizer. Theoretical analysis is carried out, the analysis is verified by simulation, and a prototype of Ka band 25.28~26.08 GHz dual nonlinear branch linearizer is achieved. It indicates that the corrected amplitude overshoot is less than 0.5 dB, the C/I3 improvement is more than 10 dB related to a single carrier IBO 9 dB, when it is linked and tested for 50 W spacebrone Travelling Wave Tube Amplifier(TWTA). |
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Keywords: | Predistortion linearizer Linear branch Nonlinear branch Amplitude overshoot |
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