Analysis of the Power Loss in the Coupling Mechanism of a Cavity Resonator (Short Papers)

An analysis of a lossy coupling mechanism is presented. It is found that the reciprocal internal Q factor is augmented by a contribution (1 /2)/spl zeta/(l /Q/sub ex/), where /spl zeta/ depends on the Parameters of the coupling mechanism and Q/sub ex/ is the external Q factor. The theory is applied to analyze the coupling to a superconducting high-Q cavity.