RAFIA RAEESCIIT/FA17-RPH-029/LHRLHR TP 5723Dr. Amna Mir2026-01-122019https://repository.cuilahore.edu.pk/handle/123456789/690Characterization of a material at high frequency is done by the use of a transmission line (coaxial) and Vector Network Analyzer (VNA). VNA measures the S-parameters that includes xture e⁄ects. Theoretical derivation of S-paramters was done by solv- ing electric eld equations subject to boundry conditions. It is clear from obtained relations that extra phase factors are included due to coaxial cells in the measurement setup. These extra phase terms are removed by using de-embedding technique. Math- ematica software was used to carry out the mathemetical steps. After de-embedding, S-parameters of material under test are obtained. These material parameters were then solved using NRW method which is used to extract complex electromagnetic properties of prepared Strontium ferrite substituted with a rare earth material. M-type Strontium ferrite with a structural formula SrxenDepartment of PhysicsFA17PhysicsRare Earth Doped FerritesHigh Frequency RegionDr. Amna MirThesis