A Method for On-Wafer Experimental Characterization of a 4-Port Circuit, Using a 2-Port Vector Network Analyze

The paper presents an experimental method useful to characterize on-wafer a four-port circuit, using a two-port VNA (V ector Network A nalyzer). As an example, the method is applied for a coupler. The results obtained by using this method and the expected results obtained by simulation are in good agreement.