A Dual-Band Impedance Transfomer for Matching Frequency Dependent Complex Source and Load Impedances

A dual-band matching network capable of providing impedance matching between two arbitrary frequency dependent complex source and load impedances is reported. The proposed topology consists of three sections namely two L-network and a π-network and possesses closed-form design equations. A number of case studies are included to demonstrate the effectiveness of the proposed technique for distinct source and load impedances at two arbitrary frequencies of interest. A prototype, working at two uncorrelated frequencies of f1 = 1 GHz and f2 = 1.8 GHz, fabricated on RO5880 shows a very good agreement between the measured and simulated results.

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