Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 93

One of the most confusing issues with respect to VNA measurements is the idea of source‐match. Source‐match also affects non‐VNA measurements when signal sources are connected directly to a DUT, but in such cases it is almost always ignored as its affect cannot be determined; but in VNA measurements, the port 1 reflectometer can help to determine the exact effect of mismatch between the source and the DUT and correct for these errors. In fact, there are three different and distinct source attributes that are often confused as the source‐match of a VNA, and each affects different measurements in different ways.