ICS 31.180 GB CCSL30 中华人民共和国国家标准 GB/T 43801—2024/IEC 61189-2-721:2015 微波频段覆铜箔层压板相对介电常数和 损耗正切值测试方法分离介质谐振器法 Measurement of relative permittivity and loss tangent for copper clad laminate at microwave frequencySplit post dielectric resonator method (IEC 61189-2-721:2015,Test methods for electrical materials, printed boards and other interconnection structures and assembliesPart 2-721: Test methods for materials for interconnection structuresMeasurement of relative permittivity and loss tangent for copper clad laminate at microwave frequency using split post dielectric resonator,IDT) 2024-03-15发布 2024-07-01实施 国家市场监督管理总局 发布 国家标准化管理委员会