The paper gives us things like calibration methods, port calibration, port network analyzer, applications, calibration, and analyzer. In the paper you can get description regarding reflectometer, measurement technique, frequency range, circuit, and microwave theory.
Lots of discussion regarding six port reflectometer, parameters, accuracy, the reflection coefficient, bandwidth, and network analyzer are explained in this paper. Here are excerpted from the paper:
The paper reviews the development of the six-port measurement technique since the time it was introduced in 1977 until present days. Working principles of six-port reflectometer and six-port network analyzer are explained. The technique is put in context with other scattering parameter measurement principles; the advantages and drawbacks are discussed. Some typical SPR implementations are presented. Basic six-port calibration methods are outlined; general significance of TRL method is accented.
Even more, this paper explains discussion such as six port measurement, range, measurement, measurement accuracy, and detector.