GB/T 46583-2025 Test methods for dielectric properties of microwave dielectric ceramics—Open cavity method and closed cavity method

Scope

This document describes the test principles, test conditions, instrumentation, test samples, test steps, test reports, calculation processes, and measurement uncertainties of the dielectric properties of microwave dielectric ceramics using two testing methods: the open cavity method and the closed cavity method.
This document is applicable to uniform cylindrical microwave dielectric ceramics. For the open cavity method, the test frequency range is 2 GHz to 24 GHz, the relative dielectric constant test range is 3 to 300, the loss angle tangent value test range is 10-4 to 6×10-3, and the resonance frequency temperature coefficient test range is -1 500×10-6/℃ to 1 500×10-6/℃. For the closed cavity method, the test frequency range is 1 GHz to 32 GHz, the relative dielectric constant test range is 3 to 300, and the loss angle tangent value test range is 2×10-5 to 10-2. This document is also applicable to the testing of the dielectric properties of other low-loss, non-magnetic solid dielectric materials in the microwave frequency range.

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