DIN EN 61189-2-719:2017-04

This part of 61189 specifies a test method of relative permittivity and loss tangent of printed board and assembly materials, expected to be determined 2 to 10 of relative permittivity and 0,001 to 0,050 of loss tangent at 500 MHz to 10 GHz. The test specimens are copper-clad laminates. The test specimens shall be cut at a distance of at least 25 mm from the edge of the panel; at least four test specimens shall be tested. The test set consists of two panels. Panel A is a panel with a conductor track on one side and a copper foil on the other. Panel B has no copper foil on one side and is provided with a copper foil on the other side. Plate A and plate B are made from the test specimens. For the construction of the test set, the copper foil is etched onto the copper-clad laminate. The electrical measurements are to be carried out using the vector network analyzer (VNA) and the test equipment. The measurement conditions such as frequency, measurement point, averaging number and degree of smoothing shall be set on the VNA. The number of data points used shall be sufficiently large to accurately capture the amplitude of the resonance peaks. The averaging can be set in such a way that the signal-to-noise ratio is improved. The VNA shall be calibrated in the measurement frequency range using a coaxial cable. A complete two-port calibration is required. After completion of the measurement, the relative permittivity and the loss factor are calculated from the data obtained. The test report shall contain, among other things, information on the test number and revision, name and description of the tested material, relative permittivity and average value at the test frequency, dissipation factor and average value at the test frequency, temperature and humidity during the test (for reference purposes), deviations from the test procedure. The responsible committee is DKE/K 682 "Aufbau- und Verbindungstechnik für elektronische Baugruppen" ("Packaging and interconnection technology for electronic assemblies") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.