An improved mounting cup is disclosed for dispensing an aerosol product from a collapsible container within an aerosol container. The first and second compressors receive and compress airflow from the aircraft exterior. The ratio of the decay constants for any two materials is greater than or equal to about 1. When the antenna switching unit selects the second antenna and the reference gain exceeds the second limit value, the gain of the variable amplifier is set to the second limit value. The gate insulating layer extends between the gate conductive layer and the first insulating layer.