Element values of a generalized Chebyshev prototype filter for suspended substrate stripline

Abstract An odd-degree lowpass prototype filter satisfying a generalized Chebyshev response with five transmission zeros at infinity and the remainder at a finite real frequency is presented. This prototype is synthesized using the alternating pole technique with little loss of accuracy for degrees up to 15. Two convenient forms of realization in suspended substrate stripline (SSS) are introduced. Tables of element values for commonly used specifications are given. These tables are suitable for the design of TEM-mode microwave filters and multiplexers having broad or narrow bandwidths.