抄録
A new sealing structure for helical heater terminal used in a combination heating microwave oven is suggested, and its sealing characteristics are investigated by analysis and measurement. The new structure is simply a conductor tube coaxially covering the heater at the input terminal. With an optimally-designed structure of this type, the transmission coefficient of the heater at 2450 MHz can be reduced to -47dB in TLM analysis and -50dB in measurement. When installed in a test set, the power leaking out from the heater terminal is found to be less than 0.2mW/cm2.
