On the Simple-loop Hybrid Ring（Part 3） ?Simple-loop Hybrid Ring of the Multi-Sections in Cascade?

摘要

The simple-loop hybrid ring has the simplest structure among various kinds of hybrid circuit. However，its hybrid characteristics are worse of other hybrid rings. 　　　There are various methods of broadbanding and one　of them is connecting the simple-loop hybrid rings in cascade. There are some ways for connecting in cascade， and as for unit section， a symmetrical simple-loop hybrid ring or an unsymmetrical one can be selected. In this paper are calculated the electrical characteristics of the hybrid circuits composed of two sections in cascade and three sections in cascade. As a result it has been found that among the circuits of two sections connected in cascade，there was one circuit with much more excellent electrical characteristics than the Reed and Wheeleru27s circuit，i.e.3dB Branch Coupler