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Does anybody have any experience with designing thermally stable HF filters (100's of MHz)? Any references appreciated :)
@comphys Have you ruled out Quartz?
@AmpBenzScientist I need the passband to be at 202 MHz, with a few MHz of bandwidth. I'm no expert on filter technology, but this frequency seems a bit high for quartz and their passbands apparently tend to be very narrow. It is unfortunate for me, because they'd be ideal otherwise.
I need to maintain the phase between two signals and to filter at least one of them. At the moment I've just made a simple LC ladder and put an identical filter on both signals, so that hopefully when they drift, they drift together. The temperature stability of this approach doesn't seem terrible actually.
@comphys Perhaps someone here does know. It's often necessary to ask if one should rather than if one could.