DESIGN OF BROAD-BAND MATCHING NETWORK WITH LOSSY JUNCTIONS USING THE REAL-FREQUENCY TECHNIQUE

A computer-aided design (CAD) procedure based on the real-frequency te chnique (RFT) is introduced for treating the matching of an arbitrary load to a complex generator, In this paper, the method has been applie d to the design of interstage matching networks for microwave active c ircuits, The RPT provides several advantages over most of the usual te chniques, It requires neither any transistor model because it directly includes measuring scattering-and noise-parameter data, nor a predete rmined matching-circuit topology is necessary, A low-noise amplifier ( LNA) design proceeding directly from experimental data is presented, M oreover, a new idea for treating the broadband matching problem leads to the use of an equalizer topology containing cascaded transmission l ines with lossy junctions, Thus, gain-flatness and stability are satis fied by designing the input and the output matching circuits by the li ne-segment technique, An example is presented for the matching of a 0. 1-5 GHz amplifier.