微波功率双极晶体管热分布的二维数值模拟及功率密度非均匀设计

利用双极晶体管的热电耦合模型对微波功率双极晶体管进行了二维直流稳态模拟 ,并且提出了功率密度非均匀的设计方法 .模拟和实验的结果说明 ,采用微波功率晶体管功率密度非均匀设计可有效提高器件电流密度的均匀性和结温的均匀性 ,从而整体提高器件的可靠性.

2-D Thermal Numeric Simulation of Microwave Power Bipolar Transistor and Nonuniform Power Density Design

By the thermal electronic coupled model,2 D temperature distribution of microwave power bipolar transistor which is steady state biased is numerically simulated.Nonuniform power density design technique is presented.The results of simulations and experiments show that power density nonuniformly designed transistor has better thermal and current uniformity than that of normal transistor.Hence nonuniform power density design technique can improve the reliability of microwave power bipolar transistor.