Exact Design of a Class of Prescribed-Line-Length Microwave /and UHF/ Bandpass Filters

A frequency-transformation is introduced which maps a low-pass ladder network into a ladder of transmission-lines of prescribed length. A non-redundant coupled-line realization is given for proto-types having transmission-zeros either at finite or at infinite frequencies. The design method is both theoretically and practically suitable for the design of narrow and broad band filters. In the paper theory, design steps as well as computational and measuring results are given.