Establishment of distributed constant circuit theory and its application to microwave circuits

摘要

Distributed constant circuit theory was established in Japan after the world war II. In 1950 K.Kuroda and 1952 S.Ikeno, A.Matsumoto, K.Hatori reported design theories of distributed constant filters by use of Richards' variable. Then many Japanese researchers joined them and the theory developed to multiwire circuits. In 1958 H.Ozaki and J.Ishii and 1961 A.Matsumoto introduced the theories in U.S.A. Thereafter the theories are applied to microwave circuits in the world. In this paper the outline of the theories are described and microwave circuits such as multiwire filters, a directional coupler and hybrid rings are shown.