Jeffrey L. Young and James W.
Sterbentz, "The circular homogeneous-ferrite microwave circulator - An asymptotic Green's function and impedance
analysis," IEEE Trans. on Microwave Theory and Techniques, vol. 51, no. 8, pp. 1939-1945, 2003.
Jeffrey L. Young and Christopher M. Johnson, "A compact, recursive trans-impedance Green's function for the
inhomogeneous ferrite, microwave circulator," IEEE Trans. on Microwave Theory and Techniques (to appear late
summer, 2004).
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