NDLI: Complex propagation in a novel ferrite-filled rectangular waveguide isolator

Content Provider	IEEE Xplore Digital Library
Author	Seewald, C.K. Bray, J.R.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, ON (Seewald, C.K.; Bray, J.R.)
Abstract	This paper investigates the propagation constant of a novel rectangular waveguide ferrite isolator. For the first time, losses associated with the device are considered. The field solution of the isolator's forward propagating mode is derived and includes dielectric loss, ferrite linewidth, and conductor loss. Roots of the propagation constant's transcendental equation are then sought on the complex plane using a gradient descent method. The impact of the losses on the isolator's performance is then assessed. Given practical loss values of tan delta = $3(10^{-4}),$ DeltaH = 250 Oe and $sigma_{cu}$ = $5.813(10^{7})$ S/m, an isolator having a waveguide width of only 6 mm will produce a forward attenuation of less than 0.051 dB/cm at 4.1 GHz, resulting in an isolator figure of merit of 89.5 dB.
Starting Page	209
Ending Page	212
File Size	111215
Page Count	4
File Format	PDF
ISBN	9781424418930
DOI	10.1109/LAPC.2008.4516903
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-17
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ferrites Isolators Rectangular waveguides Dielectric losses Propagation losses Conductors Attenuation Performance loss Propagation constant Equations
Content Type	Text
Resource Type	Article

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