This document specifies the separated cylindrical resonant cavity method for the dielectric constant and dielectric loss tangent of dielectric flat materials in the microwave and millimeter wave frequency bands, including principles, environmental conditions, instrumentation and equipment, sample requirements, test steps, calculation formulas, and precautions and test reports, etc. This document is suitable for testing the dielectric constant and dielectric loss tangent of sheet materials in the microwave and millimeter wave bands, with the electric field parallel to the flat surface. Frequency test range: f=2GHz~100GHz; Dielectric constant test range:〖ε'〗_r=2.0~100; Loss tangent test range: tanδ=1.0×10^(-5)~1.0×10^(-2 ); Temperature test range: T=-65℃~125℃.
T/CSTM 00985-2023 history
2023T/CSTM 00985-2023 Test method for the complex permittivity of low-loss dielectric plates－Split-cylinder resonator method