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Particle accelerators sometimes use superconducting niobium resonators at e.g. 1.8K offering a Q of 5e10 at 1.3 GHz. But apparently their surface resistance sc
by namibj 3y ago
Particle accelerators sometimes use superconducting niobium resonators at e.g. 1.8K offering a Q of 5e10 at 1.3 GHz.
But apparently their surface resistance scales with the square of frequency, unlike the square root in normal copper.
So maybe just just t normal conductors like copper, silver, graphene (assuming the latter can be commercially made to surpass silver in RF surface resistance).
- jacquesm 3y agoSilver is very good for RF power work, so good that I doubt that anything will be able to supplant it on a cost basis because you only need a tiny little bit of it to plate your copper carrier to get really good results. Obviously not perfect, there is still some resistance but it's hard to compete with because of the combination of properties in terms of ductility, flexibility, resistance to deep corrosion and so on.