Computer Aided Approach to the Design of Y-Junction Stripline and MicrostripFerrite Circulators

摘要

New interest is shown in modernization of ferrite component technology. Theworkhorse of ferrite components is the Y-junction circulator; it is used as a 3-port circulator, 2-port isolator, or a single-p throw switch. For new technology it is useful to increase bandwidth capability, minimize size, and create designs compatible with monolithic circuits. Until now there has been no publicly available circulator analysis computer program. A concise compendium on microwave ferrite Y-junction circulators is provided in this report. It consists of background and tutorial information on ferrite media, junction circulator theory and evolution, modern improvements in the theory that permit wideband analysis, inclusion of dielectric losses in the ferrite, and a listing for a FORTRAN computer program to perform wideband circulator performance analysis. This theoretical information and computer program will be useful for further work on optimization of circulator bandwidth, size, and monolithic circuit compatibility. Also, it will be useful in examining quantitatively the effects of dielectric losses. Circulator microwave ferrite, Computer program FORTRAN model analysis, Microstrip stripline.