Measurement of impedance and attenuation of a cable through an arbitrary loss-free junction

The paper considers the problem of finding the impedance and attenuation of a transmission line when measured through an arbitrary loss-free junction. Several possibilities for the exact determination of impedance in such a case are mentioned, and the results of tests carried out to determine the usefulness and accuracy of certain methods are presented. Some information is also given on the experimental accuracy of the well-known circle-diagram technique for determining transmission-line characteristics.