Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 117

Calibration is often a concern with multiport test systems. Traditional S‐parameter calibrations require measurements between every path of a test system. However, new techniques have greatly reduced the total number of calibration steps to the point where a full N‐by‐N port S‐parameter calibration can be achieved with a single one‐port return loss calibration and N‐1 thru measurements using the quick‐short‐open‐load‐thru (QSOLT) calibration. More details of these new calibration methods will be discussed in Chapter 3. Some manufacturers provide high‐port‐count electronic calibration modules that can simplify the calibration process.