I have a 20.000 Mhz Crystal Oscillator Module. If I just wanted to transmit a carrier wave at 20 megahertz, what would be from A to B?
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My guess would be an ATU (aerial tuning unit) consisting of inductances and variable capacitors.
Keep the output clean with a filter that can apply a little gain at 20MHz. Here's an unusual one that gives higher Q the more you load it: -
This has been simulated from an earlier filter design I did but you'll still need to tweak values such as C1 and C3 - I suggest 10pF trimmers.