Dave, See http://en.wikipedia.org/wiki/Superconducting_radio_frequency
The R_BCS, which is the surface resistance, goes as f^2. We looked at making cellular combiner cavities out of superconductors at the time of the early years of the HTC superconductors. It turned out that there was a business case for a Type 1 superconductor combiner, but the HTC devices were not as good. Bob On Mon, Jan 27, 2014 at 9:58 PM, David Roberson <[email protected]> wrote: > Bob, > > I was unaware of the fact that superconductors only work at DC. I knew > they were used in microwave cavities so I assumed that the effect was more > broadband than you are suggesting. What is the theory that leads to them > loosing their capabilities as frequency is increased? > > Dave > >
