Phytech said:
Crystal filter works up to 300-400 MHz (3rd over tone, 5th over tone). So I guess you could try crystal filter.
In order to use a crystal in an overtone mode in a ladder filter, do I simply connect an LC tank, resonating at the 5th overtone, between one pin of the crystal and GND?
e.g. in this image, would I replace C1 and C2 with LC tanks at the 5th overtone?
**broken link removed**
Thanks,
Annirak
Added after 5 hours 15 minutes:
One additional question: Is it possible to use a ceramic filter in an overtone mode? If so, how do I go about implementing that? Do I simply need a bandpass filter either before or after the resonator?
Thanks,
Annirak