【摘要】 基于ANSYS有限元分析软件的热分析功能,在匹配吸收和材料高温环境稳定工作的条件下,对0.1 THz波功率探头两种不同结构的功率敏感体进行建模,在0~50 m W输入功率条件下,仿真计算它们的温度分布,通过比较温差大小、达到温度平衡稳定的时间以及材料的温度承受能力等,确定哪种结构使探头性能更好,能更准确地定标。更多还原

【Abstract】 The temperature distribution of the 0. 1 THz power probe,heated at an input power in 0 ~ 50 m W range,was approximated,modeled,analyzed in thermal dynamics and simulated in finite element method with software ANSYS.The impact of the heating conditions,including the Types-I and II structures of the power sensitive strip,thermal properties of the components and power density,on the temperature distribution,heating and cooling rates was thoretically calculated and numerically simulated. The simulated and calculated results of Type-I and Type-II strips were found to be in good agreement with a dicrepancy about 1. 12% ~ 1. 15%. In addition to the heat tolerance ability of the sensor material,the 6-variables of the two strips,including the highest and lowest temperatures heated at a fixed power; the temperatures measured at the "head and tail"of the strips,heat balance time and cooling time,were compared. When it comes to performance and calibration,we suggest that Type-II may outperform Type-I of the power sensitive strip.更多还原