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A sapphire output window is designed for 108GHz folded waveguide traveling-wave tube (FW-TWT). The voltage standing wave ratio (VSWR) is calculated using CST Microwave Studio (MWS). The transmission modes in the window are analyzed. Thermal analysis of the output window using ANSYS package is presented. With different power losses in the window, temperature, total deformation and equivalent stress...
As the major unit of the electrical energy transformations device, IGBT (Insulated Gate Bipolar Transistor) determines the lifetime of the power device immediately. IGBT module is normally made up of chip, DBC (Direct Bonded Copper), substrate and bonding wire, Due to the different CTE(Coefficient of Thermal Expansion), thermal stress occurs when IGBT module works. which leads to device failure. In...
As the major unit of the electrical energy transformations device, IGBT (Insulated Gate Bipolar Transistor) determines the lifetime of the power device immediately. IGBT module is normally made up of chip, DBC (Direct Bonded Copper), substrate and bonding wire, Due to the different CTE(Coefficient of Thermal Expansion), thermal stress occurs when IGBT module works. which leads to device failure. In...
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