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In this paper, first, FDTD, Semi-Implicit Method for Pressure Linked Equations (SIMPLE), Monte Carlo and Radiative Energy Absorption Distribution (READ) methods are combined to calculate electromagnetic field and all the heat transfer phenomena of heat transport, heat transfer by air convection and heat radiation (It is called FDTD-SIMPLE-MR method.). The temperature distribution of λ/4 type EM-absorber using resistive film under high power injection is calculated using FDTD-SIMPLE-MR method and a traditional method. Next, the high power injection experiment is conducted using an absorber and high power RF instruments to get the temperature distribution experimentally. Finally, the calculated and measured temperature distributions of the absorber are compared. As a result, the calculated temperature distribution by FDTD-SIMPLE-MR method agrees well with the measured one and the validity of FDTD-SIMPLE-MR method is confirmed.

Al-shorted WSix/Si gate performance in high-frequency band Si power MOSFETs is analyzed with Process/Device/Circuit continuous simulation. We confirm that the Al-shorted WSix/Si (400 nm height) gate can be performed well even in the large-signal operation at highfrequencies.

Utilization of electromagnetic absorbers under high power is increasing to estimate performance of high power radars in anechoic chambers. Variation of absorption characteristics of absorbers is expected due to the generation of heat or temperature change. To suppress temperature increase, the absorber has to be cooled down in some kind of way. For example, the means are sending air to the absorber, loading radiating fin on the absorber, developing lattice structure in the absorber to increase heat transfer, and so on. In this paper, for the fundamental examination, the wind-chill factor by sending air to a heated¨/4 EM-absorber is evaluated by measuring the temperature distribution with and without air blasting. As a result, the maximum temperature 78[© C] is confirmed on the surface of the absorber without air blasting. Meanwhile the maximum temperature decreases to 70[© C] on the surface of the absorber with air blasting. Therefore, the wind-chill factor by the air blasting is verified.