2023KS C IEC 61338-1-4-2023 Waveguide type dielectric resonators Part 1-4: General information and test conditions Method for measurement of complex relative permittivity of dielectric resonator materials at millimeter-wave frequencies
2019KS C IEC 61338-1-5:2019 Waveguide type dielectric resonators — Part 1-5: General information and test conditions — Measurement method of conductivity at interface between conductor layer and dielectric substrate at microwave
2018KS C IEC 61338-1:2018 Waveguide type dielectric resonators ─ Part 1: Generic specification