USING A MICROSTRIP BANDPASS FILTER TO COMPARE DIFFERENT CIRCUIT ANALYSIS TECHNIQUES

A 22.5-GHz microstrip bandpass filter is analyzed using three differen t circuit analysis techniques. Circuit theory modeling fails to provid e an accurate prediction when compared to measured data. But a hybrid analysis, which uses electromagnetic field solver computations and cir cuit theory models, provides good agreement with measured data. A more complete field solver analysis of the filter also shows good agreemen t when compared to measurements. In the latter two cases, the electrom agnetic analysis captures the actual current distribution on the filte r that circuit theory fails to predict. (C) 1995 John Wiley & Sons, In c.