Design of Microwave Filters, ImpedanceMatching Networks, and Coupling Structures. Volume I

摘要

Design techniques are presented for a wide variety of low-pass, band-pass, high-pass, and band-stop microwave filters; for multiplexers; and for certain kinds of directional couplers. Most of the design procedures described make use of either a lumped-element low-pass prototype filter or a step-transformer prototype as a basis for design. Prototype filter designs are tabulated, and data is given relevant to the use of prototype filters as a basis for the design of impedance-matching networks and time-delay networks. Design formulas and tables for step-transformer prototypes are also given. The design of microwave filter structures to serve as impedance-matching networks is discussed. The design of microwave filters to achieve various time-delay (or slowwave) properties is also discussed. Various equations, graphs, and tables are collected relevant to the design of coaxial lines, strip-lines, waveguides, parallel-coupled lines between common ground planes, arrays of lines between ground planes, coupling and junction discontinuities, and resonators. Techniques for measuring the Q's of resonators and the coupling coefficients between resonators are also discussed, along with procedures for tuning filters. (Author)