Abstract
Recent development trends of several resonance methods are reviewed to measure the complex relative permittivity (relative permittivity εr and loss tangent tanδ of low-loss dielectric materials and the surface resistance Rs of high temperature superconductors (HTS) in microwave and millimeter-wave regions; that is, a cavity resonator method, a cut-off circular waveguide method, a balanced-type circular disc resonator method, a Fabry-Perot open resonator method, a whispering-gallery mode resonator method, a Hakki-Coleman method, a two-dielectric-resonator method, a one-dielectric-resonator method, a dielectric resonator method using NRD-guides, and a perturbation method.
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