I am going to built microwave system with following system configuration.
Power Circuit -> Magnetron -> Wave Guide Coupler -> Isolator -> 3 Stub Tuner -> Applicator.
Now, I want to make 3 Stub Tuner Automatic. I understand that, to do so I need to measure reflected power.
I am thinking of doing it cheaply using isolator.
I am using water circulation for dumping excess power in isolator.
So, If I measure incoming and outgoing water temperature at constant flow, will I have accurate measure of reflective power ?
And if so, will that can be use to change the 3 stubs accordingly to tune the system ?
( thanks. I'm newbie in microwave engineering…)