NDLI: 3D dyadic Green's function for radially inhomogeneous circular ferrite circulator

Content Provider	IEEE Xplore Digital Library
Author	Krowne, C.M.
Copyright Year	1996
Description	Author affiliation: Div. of Electron. Sci. & Technol., US Naval Res. Lab., Washington, DC, USA (Krowne, C.M.)
Abstract	Here we develop a three dimensional (3D) dyadic recursive Green's function with elements G/sub ij//sup sv/ suitable for determining the electric field components (E/sub z/, E/sub r/, E/sub /spl phi//) and magnetic field components (H/sub z/, H/sub r/, H/sub /spl phi//) anywhere within a circular, planar (microstrip or stripline) circulator. All of the components are present, although the E/sub z/, H/sub r/, and H/sub /spl phi// components may still be dominant as long as the thickness h of the substrate is small. The recursive nature of G/sub ij//sup sv/ is a reflection of the inhomogeneous region being broken up into one inner disk containing a singularity and N annuli. G/sub ij//sup sv/(r,/spl phi/,z) is found for any arbitrary point (r,/spl phi/,z) within the disk region and within any i th annulus. Specification of G/sub ij//sup sv/, i=E or H, j=H, s=z, v=/spl phi/ or z, at the circulator diameter r=R leads to the determination of the circulator S-parameters. The ports have been separated into discretized ports with elements (subports) and continuous ports. It is shown how G/sub ij//sup sv/(r,/spl phi/,z) enables S-parameters to be found for three and six port ferrite circulators. Because of the z-variation present in the finite thickness model, TEM, TM, and TE modal decompositions are not allowed for the 3D analysis, and instead it is found that new coupled governing equations describe the field behavior in the circulator. The theory is readily adaptable to constructing a computer code for numerical evaluation of finite thickness devices. Also, symmetric port disposition and metallic losses are covered.
Starting Page	121
Ending Page	124
File Size	370865
Page Count	4
File Format	PDF
ISBN	0780332466
ISSN	0149645X
DOI	10.1109/MWSYM.1996.508477
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Green's function methods Scattering parameters Nonuniform electric fields Magnetic fields Microstrip components Stripline components Reflection Ferrites Tellurium Coupled mode analysis
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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