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Inside an Early Microwave Cavity Filter (250MHz - 1GHz)
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@orbitingeyes2540 Ай бұрын
Most likely reason for the mismatch and variation in insertion loss is that the coupling probes don't scale as you tune the cavity.
@TheOpticalFreak 7 ай бұрын
Wow 😮 that is so cool! 😃👍
@lordgarak Жыл бұрын
Late comment on an old video. But that thing is measuring as if there is something really wrong with it. Cavity filters should only have a few DB of insertion loss and have a much lower return loss. My guess is that one of the coupling loops is broken.
@RobertResearchRadios Жыл бұрын
Hmm maybe a connector with a bad contact? I have no intuition for insertion loss on cavity filters so didn't notice it might be broken, but I can't see broken loops from the video at least. Maybe I'll take another look inside it someday. Not sure where it's gotten off to, but the insight of a "simple tailor" is appreciated good sir.
@michael.wilspang 5 ай бұрын
What is the name of the manufacturer and p/n of this filter?
@egbertgroot2737 3 жыл бұрын
Interesting ..... always wonder how using a transmitting tube like the 2c39 this cavity is put on top of the anode ..... and still works ....
@masonjohn4433 Жыл бұрын
Do you know of a good resource that talks about how to design these? Most of the microwave engineering textbooks that I have found contain only a few paragraphs on cavity resonators.
@jeremycole3008 2 жыл бұрын
wonder if you could use this thing for frequency modulation slope detection across this frequency band?
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