Title :
A novel waveguide Y-junction circulator with a ferrite sphere for millimeter waves
Author :
Yung, Edward K N ; Zhang, D.G. ; Wong, Roger S K
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong
fDate :
3/1/1996 12:00:00 AM
Abstract :
A novel waveguide Y-junction circulator with a ferrite sphere is developed for uses at millimeter-wave frequencies. Sphere is preferred because the production cost of a pertinent circulator is lower. Performance of the new circulator is comparable to the conventional one with a cylindrical ferrite. A simple formula is derived for determining the center frequency of a circulator. Good agreement between analytical results and measurements is observed. An extremely fast method is developed to analyze the circulator. Various properties of the circulator can be predicted with reasonable accuracy
Keywords :
ferrite circulators; magnetic millimetre wave devices; millimetre wave circulators; waveguide discontinuities; center frequency; ferrite sphere; millimeter waves; waveguide Y-junction circulator; Ball bearings; Electromagnetic waveguides; Ferrites; Frequency; Millimeter wave technology; Permittivity; Production; Saturation magnetization; Tensile stress; Waveguide junctions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
