FSRFT Based Broadband Double Matching via Passband Extremums Determination

Abstract

Fast simplified real frequency technique (FSRFT) isa numerical solver used to solve microwave broadband doublematching(DM) circuit design problems in a much faster andeffective manner. Recently, it has been reported that an FSRFTbased Matlab code can complete the design of a orderlowpass lumped element double matching network to match agiven generator and load impedance within an optimization timeof only 0.6 seconds, a 47 fold less time than that of the samedesign done using the classical simplified real frequencytechnique (SRFT). FSRFT owes this superior speed performanceto the fact that it tracks only (system unknowns plus 1)number of passband extremum points selected from among thenumber of gain data ( ). This work introduces a simplenumerical technique called PED (passband extremumsdetermination technique) to be used in determination of thesepassband extremum points (PEs). An exemplary ordermicrowave bandpass DM circuit design using FSRFT basedMatlab (of Mathworks Inc.) code and the simulation of thisdesign via MWO (of AWR Corp.) has yielded the same circuitperformance with an exact agreement. Thus, FSRFT, equippedwith the PED, newly proposed hereby, might be used as apowerful solver in designing broadband circuits in many fieldssuch as RF/microwave, radar, and communications