Materials Measurement Phil Bartley Shelley Begley

Transmission Algorithms in 85071EOptimumAlgorithm Measured OutputLengthNicolson-Ross S 11 ,S 21 ,S 12 ,S 22 λ g /4 ε r and µ r(PN 8510-3) (or S 11 ,S 21 )Precision (NIST) S 11 ,S 21 ,S 12 ,S 22 nλ g /2 ε rFast S 21 ,S 12 nλ g /2 ε r(S 21 )(85071E also has three reflection algorithms)These are the algorithms used in 85070E. They will convert the measured S-parameters to permittivity or permeability. The first three require a two-portfixture. The last two require a one-port fixture which may be better for liquidsor powders where a shorted waveguide section can be turned on end andfilled. One-port fixtures may also be better for measurements at hightemperatures where one end of the waveguide can be heated while coolingmechanisms keep the network analyzer cool.36