Electrical performance of microwave boards

Work has focused on filling the need for electrical properties data at microwave frequencies on a wide range of circuit board substrates including materials other than the traditional array of composites based on poly(tetrafluoroethylene), (PTFE). An effort is continuing to study the variation of permittivity (K´) and dissipation factor (tanδ) with changing temperature in a test format close to circuit board conditions. Similar effort is focused on observing how K´ and tanδ vary with frequency. This is providing a growing data base on a growing array of new products for intelligent materials selection on new applications