中国物理B ›› 2016, Vol. 25 ›› Issue (4): 48504-048504.doi: 10.1088/1674-1056/25/4/048504
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Yang Liu(刘阳), Chang-Chun Chai(柴常春), Yin-Tang Yang(杨银堂), Jing Sun(孙静), Zhi-Peng Li(李志鹏)
Yang Liu(刘阳)1, Chang-Chun Chai(柴常春)1, Yin-Tang Yang(杨银堂)1, Jing Sun(孙静)2, Zhi-Peng Li(李志鹏)2
摘要: In this paper, we present the damage effect and mechanism of high power microwave (HPM) on AlGaAs/GaAs pseudomorphic high-electron-mobility transistor (pHEMT) of low-noise amplifier (LNA). A detailed investigation is carried out by simulation and experiment study. A two-dimensional electro-thermal model of the typical GaAs pHEMT induced by HPM is established in this paper. The simulation result reveals that avalanche breakdown, intrinsic excitation, and thermal breakdown all contribute to damage process. Heat accumulation occurs during the positive half cycle and the cylinder under the gate near the source side is most susceptible to burn-out. Experiment is carried out by injecting high power microwave into GaAs pHEMT LNA samples. It is found that the damage to LNA is because of the burn-out at first stage pHEMT. The interiors of the damaged samples are observed by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). Experimental results accord well with the simulation of our model.
中图分类号: (Field effect devices)