Dielectric loaded HTS resonators as frequency standards and low phase noise oscillators

As a result of the recent availability of reliable low power cryocoolers it has become possible to design compact dielectric loaded resonators making use of ultralow microwave loss properties of thin films of high temperature superconductors (HTS) such as YBa₂CuO_7-x. In this paper we address some of the design issues associated with using such high Q resonators as the reference element for frequency standards and low phase noise oscillators