Title :
A novel predistortion circuit with parallel diodes
Author :
Yu Chongzhi ; Liu Jie ; Wang Gang ; Su Xiaobao
Author_Institution :
Inst. of Electron., Beijing, China
Abstract :
Conventional predistortion circuit with a parallel diode can only obtain expansions of gain but compressions of phase, which can´t compensate expansions of gain and phase of TWT(Traveling Wave Tube) working near saturate point. This paper proposed a novel predistortion circuit with parallel diodes. Cascading the predistortion circuit and the ka-band TWT model, simulation results show that the gain´s and phase´s compression of it are improved from 6.5 dB and 49.5°to 1.34 dB and 11.3°.
Keywords :
diodes; travelling wave tubes; gain 1.34 dB; gain compression; parallel diodes; phase compression; predistortion circuit; traveling wave tube; Electron tubes; Gain; Integrated circuit modeling; Microwave circuits; Predistortion; Resistance; Transmission line matrix methods; Traveling Wave Tube Amplifiers; expansion of gain and phase; nonlinear distortions; predistortion circuit;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7223824
