Journal ArticleDOI
Resonant Frequencies, Q-Factor, and Susceptance Slope Parameter of Waveguide Circulators Using Weakly Magnetized Open Resonators
J. Helszajn,J. Sharp +1 more
TLDR
In this article, the authors derived an exact description of the difference between the split frequencies of the magnetized ferrite resonator, which allows the loaded Q-factor of a junction using a weakly magnetized resonator to be determined.Abstract:
A useful quantity in the description of junction circulators is the difference between the split frequencies of the magnetized ferrite resonator. A knowledge of this quantity allows the loaded Q-factor of a junction using a weakly magnetized resonator to be determined. This paper derives an exact description of the former quantity in the case of the open quarter-wave long (partial-height) disk resonator used in the construction of commercial turnstile waveguide circulators. This is done by employing duality between a ferrite-filled circular waveguide having ideal electric wall boundary conditions and one having ideal magnetic wall boundaries. The effect of an image wall on the open flat face of the open resonator is considered separately. The paper includes some remarks about the susceptance slope parameters of disk and triangular open resonators.read more
Citations
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Journal ArticleDOI
Substrate-Integrated-Waveguide Circulators Suitable for Millimeter-Wave Integration
W. D'Orazio,Ke Wu +1 more
TL;DR: In this article, a study of substrate-integrated millimeter-wave degree-2 circulators is presented, where the authors characterize the complex gyrator circuit as a preamble to design.
Journal ArticleDOI
Analysis and development of millimeter-wave waveguide-junction circulator with a ferrite sphere
TL;DR: In this paper, a three-dimensional modeling strategy using a self-inconsistent mixed-coordinates-based modal field-matching procedure is developed to characterize electrical performance of the proposed circulator.
Journal ArticleDOI
An efficient method to analyze the H-plane waveguide junction circulator with a ferrite sphere
R. S. Chen,Edward K. N. Yung +1 more
TL;DR: In this paper, the authors present an approximate but efficient field treatment of the new easy-to-fabricate ferrite-sphere-based H-plane waveguide circulator for potentially low-cost millimeter-wave communication systems.
Journal ArticleDOI
Design of Waveguide Circulators with Chebyshev Characteristics Using Partial-Height Ferrite Resonators
TL;DR: In this paper, a step-by-step approach to the design of waveguide circulators using partial-height resonators is presented, which consists of defining the physical variables of the ferrite region in terms of the frequency, VSWR, and bandwidth specification.
Journal ArticleDOI
Adjustment of In-Phase Mode in Circulators Using Turnstile Junctions
J. Helszajn,J. Sharp +1 more
TL;DR: In this paper, the in-phase eigenvalue s/sub 0/ for different filling factors and radial wavenumbers of the inphase resonator was experimentally evaluated.
References
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Journal ArticleDOI
Modes in Wave Guides Containing Ferrites
TL;DR: In this paper, it has been shown that when a static magnetic field is applied in the longitudinal direction to a wave guide containing a ferrite material, the medium within the guide becomes anisotropic.
Journal ArticleDOI
Guided electromagnetic waves in anisotropic media
TL;DR: In this paper, the authors present a survey of the theory of guided waves in isotropic media and of the problems arising in anisotropic media, together with a historical synopsis.
Journal ArticleDOI
The identification of modal resonances in ferrite loaded waveguide Y-junctions and their adjustment for circulation
TL;DR: In this paper, extensive eigenvalue measurements made on an X-band waveguide Y-junction containing different ferrite geometries were used to identify the principal field modes involved, examine their sensitivities to various junction parameters, and arrange their correct displacement for circulation.
Journal ArticleDOI
Operation Modes of a Waveguide Y Circulator (Short Papers)
TL;DR: In this paper, the operation modes of a waveguide Y circulator with a circular and a triangular ferrite post were investigated both theoretically and experimentally, taking into account the field variation along the ferrite axis.