Hey Guys. Actually I have used VNA for S-Parameter measurements. In S22 I do not observe curve tracing in capacitance region of Smith chart when Vgs=O V and Vds=O V. But The curve traces the capacitive region of Smith chart when Vgs=O V and Vds=2 V.
The measurement are made by connecting MESFET as a 2-port network and common source configuration. Gate is input port and Drain is output port.
The measurement are made by connecting MESFET as a 2-port network and common source configuration. Gate is input port and Drain is output port.
