In applying high power attenuators and terminations to RF and Microwave circuits
there are a number of requirements to be observed to obtain satisfactory life. These are
heat-generating devices so the removal of excess heat is key to maintaining a safe film temperature.
This heat removal is often accomplished by mounting the resistive element (chip) to a heat sink,
which is then in turn mounted to a cold plate.
Overheating of the resistive film is to be avoided as it can cause a resistance shift.
This shift will interfere with the carefully designed RF impedance match. ........
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