SYNTHESIS OF CHEBYSHEV IMPEDANCE MATCHING NETWORKS, FILTERS, AND INTERSTAGES

摘要

Work of R. M. Fano on the theoretical limitations of broadband impedance matching is utilized to give a straight-forward procedure for synthesis of optimum, lossless, Chebyshev, wideband impedance matching networks for various classes of loads. Procedures are described and examples are presented for low-pass, high-pass, and band-pass matching network design for use with specified loads so as to meet prescribed bandwidth and reflection coeffi­cient magnitude specifications i.e., any specifications that are physically .realizable. The design procedure is greatly simplified by the use of tabu­lated reflection coefficient polynomials each of which is a function of frequency p and a design parameter. The application of this pro­cedure to Chebyshev filter and vacuum-tube amplifier interstage design is also discussed.