Impedance-Transforming Lumped Element Two-Branch 90 Couplers in Case of Type C
نویسندگان
چکیده
An impedance-transforming lumped-element (LE) two-branch 90 coupler is discussed in this paper. The LE coupler discussed here can be derived from a branch-line coupler consisting of one-quarter or three-quarters wavelength transmission-lines (that is, case of type C) and classified into five groups. Normally, the LE coupler needs 8 circuit elements. However, the existence of reduced LE couplers consisting of 6 circuit elements is shown in this paper during the process for deriving the five circuit groups. The circuit element values are given by terminal admittance y02 and power division ratio k. Key-Words: Impedance-transforming, Lumped-element, Two-branch, 90 coupler, 6 elements
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