Apparatus and method for determining the one width band - noise figure from two sides band - measurements

摘要

a einseitenband - noise figure of a device under test is to zweiseitenband measurements. a rauschmeu00dfsystem is created, a rauschquelle, a mixer, a lokaloszillator and an adjustable zwischenfrequenzempfu00e4nger level.three independent measurements are carried out (with the lokaloszillatorfrequenz higher than the rf measurement frequency, another with the lokaloszillatorfrequenz lower than the rf frequency, and the third with the lokaloszillatorfrequenz at the rf frequency and the intermediate frequency of the d oppelten its previous frequency).this rauschleistungsmessungen so combined to the adverse seitenbu00e4nder extinct. preferably highly used during a calibration also three ausgangsrauschleistungsmessungen carried out so that the subsequent measurements are corrected for impedanzfehlanpassungsfehlern.the complexity and the cost of the implementation of specific einseitenband - rauschzahlmessungen are compared with the conventional einseitenband - measurement systems is reduced.