IEC 61189-2-721:2015

IEC 61189-2-721:2015 defines a test method for measuring the relative permittivity and loss tangent of copper clad laminate at microwave frequency using a split post dielectric resonator. For organizations assessing laminate performance in high-frequency designs, it provides a focused technical reference for documented evaluation, laboratory comparison, and procurement review. IEC 61189-2-721:2015 is relevant where controlled material characterization supports engineering validation, risk management, and consistency across testing workflows for interconnection structures and assemblies.

IEC 61189-2-721:2015 standard overview

This document belongs to the IEC 61189 series for test methods covering electrical materials, printed boards, and related interconnection structures. Its scope is centered on a measurement technique for key dielectric properties of copper clad laminate at microwave frequency, using a split post dielectric resonator. In practice, that makes it useful for technical assessment of laminate behavior in frequency-sensitive designs, where relative permittivity and loss tangent are important inputs to material selection, simulation correlation, and conformity assessment preparation.

Applications of IEC 61189-2-721:2015

IEC 61189-2-721:2015 is commonly relevant in laboratory evaluation of laminates used for printed boards and other interconnection structures where microwave performance matters. It may support engineering documentation for material qualification, supplier comparison, and acceptance criteria in quality workflows. The method is also useful for organizations involved in high-frequency electronics development, where consistent dielectric measurements help align testing environments, product evaluation, and technical validation before release or scale-up.

Why IEC 61189-2-721:2015 matters

Reliable dielectric data is important for operational consistency, especially when design targets depend on predictable behavior at microwave frequencies. This reference supports repeatable measurement practices, which can improve confidence in compliance workflows, procurement decisions, and technical review of laminate materials. By focusing on a defined test method, it helps reduce ambiguity during engineering assessment and can support safer, more interoperable outcomes across documentation, verification activities, and conformity assessment programs.

• Measurement of relative permittivity for copper clad laminate at microwave frequency
• Evaluation of loss tangent using a split post dielectric resonator method
• Support for material qualification, supplier comparison, and technical validation
• Useful for printed board and interconnection structure testing workflows