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Comment réaliser des mesures VNA précises en montage fixe
Une mesure par analyseur de réseau vectoriel (VNA) intégré à un dispositif de fixation consiste à connecter un dispositif sous test (DUT) via ce dispositif plutôt que directement aux ports de test de l’analyseur. Le montage de mesure comprend un analyseur de réseau vectoriel, des câbles de test étalonnés, des interfaces de fixation et une connexion reproductible du DUT. La procédure commence par un étalonnage au niveau des plans de référence de mesure accessibles, suivi de la caractérisation du dispositif de fixation et de l’application de techniques appropriées de correction d’erreur ou de désembedding. Les ingénieurs mesurent ensuite les paramètres de diffusion (paramètres S) du DUT sur la gamme de fréquences requise afin d’évaluer la perte d’insertion, la perte de retour et d’autres caractéristiques RF pertinentes, tout en tenant compte des effets électriques introduits par le dispositif de fixation.
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