Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (2): 28502-028502.doi: 10.1088/1674-1056/22/2/028502
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
马振洋, 柴常春, 任兴荣, 杨银堂, 赵颖博, 乔丽萍
Ma Zhen-Yang (马振洋), Chai Chang-Chun (柴常春), Ren Xing-Rong (任兴荣), Yang Yin-Tang (杨银堂), Zhao Ying-Bo (赵颖博), Qiao Li-Ping (乔丽萍 )
摘要: In the present paper we conduct a theoretical study of the thermal accumulation effect of a typical bipolar transistor caused by high power pulsed microwave (HPM), and investigate the thermal accumulation effect as a function of pulse repetition frequency (PRF) and duty cycle. A study of the damage mechanism of the device is carried out from the variation analysis of the distribution of the electric field and the current density. The result shows that the accumulation temperature increases with PRF increasing and the threshold for the transistor is about 2 kHz. The response of the peak temperature induced by the injected single pulses indicates that the falling time is much longer than the rising time. Adopting the fitting method, the relationship between the peak temperature and the time during the rising edge and that between the peak temperature and the time during the falling edge are obtained. Moreover, the accumulation temperature decreases with duty cycle increasing for a certain mean power.
中图分类号: (Bipolar transistors)