LINE NETWORK NETWORK (LNN) - AN ALTERNATIVE IN-FIXTURE CALIBRATION PROCEDURE

An alternative method for a network analyzer calibration is evaluated, This line network network (LNN) method avoids de-embedding of the dev ice under test (DUT) and it allows the characterization of an unknown two-port inserted between an arbitrary number of cascaded unknown two- ports, An unknown obstacle must be moved on a transmission line into t hree positions, The LNN calibration technique delivers the electrical wavelength or the relative dielectric constant of the transmission lin e and the scattering parameters of the obstacle, Since the connectors do not have to be exchanged, nonreproducibilities of the connectors ar e only a minor problem. Additionally, a double-calibration technique i s presented. The double-calibration technique is used to employ the LN N method on both sides of the two-port DUT in order to perform an erro r-corrected measurement. Experimental results compare the LNN method w ith the tru-reflect-line (TRL) method particularly for an in-fixture c alibration.