This paper discusses the techniques that are available for characterising circuit materials at microwave and millimetre wave frequencies. In particular, the paper focuses on a new technique for measuring the loss tangent of substrates at mm-wave frequencies using a circular resonant cavity. The benefits of the new technique are that it is simple, low cost, capable of good accuracy and has the potential to work at high mm-wave frequencies.
Background and Objective:
Zwitterionic polymer electrolyte has been successfully synthesized using NH4PF6
salt. The conductivity of the synthesized polymer membrane is found to be of the order of 10-3Scm-1. Dielectric and
Modulus properties of the polymer electrolyte have also been studied which showed well relaxation peaks with both temperature and salt concentrations.
Result:
This is well depicted with the loss tangent curve. Debye type relaxation behavior
has observed from the electric modulus.
Conclusion:
Frequency dependent conductivity data (fitted with Jonscher's power law equation) confirmed the presence of NCL/SLPL type behavior in the studied frequency range.
Measurement of the Dielectric Constant and Loss Tangent of Thallium Mixed Halide Crystals KRS-5 and KRS-6 at 95GHz