Content may be subject to copyright.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publ... ...This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in [Method of measuring loaded Q?factor of single?ended cavity resonators using reflection bridge. Review of Scientific Instruments 49, 3 p378-379 (1978)] and may be found at https://doi.org/10.1063/1.1135411.