Title :
An X-band high power pulsed amplifier with high efficiency based on radial waveguide spatial combining technique
Author :
Chen, H. ; Ji, X.-F. ; Jiang, L.-J. ; Zhang, Y.-X.
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
An X-band high power pulsed amplifier with high efficiency based on radial waveguide spatial combining technique is designed and implemented in this paper. A maximum pulsed peak power level of 208.9 W at the frequency 9.85 GHz was observed, under the condition of 4 KHz pulse repeat frequency (PRF) and 10% of duty cycle. Key features of this combined solid-state power amplifier (SSPA) are its maximum power added efficiency (PAE) (>;43.6%) and active combining efficiency (>;92.8%). From 9.5 to 10.5 GHz, the pulsed power amplifier (PA) can provide a minimum output power level 138 W. The gain varied between 41.4 and 43.1 dB at the desired frequency range, with less than ±0.85-dB gain variation. The PAE of the active combiner fluctuated between 36.5% and 43.6% as frequency varied.
Keywords :
power amplifiers; waveguides; frequency 9.85 GHz; high efficiency; high power pulsed amplifier; power 208.9 W; pulse repeat frequency; radial waveguide; solid state power amplifier; spatial combining technique; Gain; Microwave circuits; Power amplifiers; Power combiners; Power dividers; Probes; HPA (high power amplifier); PSSPA (pulsed solid-state power amplifier); Radial waveguide; divider/combiner; high PAE;
Conference_Titel :
Microwave Technology & Computational Electromagnetics (ICMTCE), 2011 IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-8556-7
DOI :
10.1109/ICMTCE.2011.5915182
