High power ferrite phase shifter for beam steering applications

Current electronic beam steering applications require the design of high power differential phase shift sections with increased bandwidth and optimum operational efficiency. At high power levels nonlinear loss is prevalent but this can be avoided using a technique called dasiamode segregationpsila b...

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Bibliographic Details
Published in2009 3rd European Conference on Antennas and Propagation pp. 3029 - 3033
Main Authors Zafar, J., Gibson, A.A.P., Zafar, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2009
Subjects
Bandwidth
Beam steering
Ferrimagnetic materials
Ferrites
Finite element methods
Magnetic circuits
Magnetic resonance
Magnetization
Magnetostatics
Phase shifters
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Summary:Current electronic beam steering applications require the design of high power differential phase shift sections with increased bandwidth and optimum operational efficiency. At high power levels nonlinear loss is prevalent but this can be avoided using a technique called dasiamode segregationpsila by biasing the ferrite above ferrimagnetic resonance. A combined magnetostatic/microwave finite element scheme is used to model this mode of operation in a high power partial height differential phase shifter. Commencing from the non-linear magnetisation curve and magnetic circuit geometry, the magnetic state of the ferrite is evaluated as a prerequisite to calculating the full microwave solution. The above resonance operation avoids nonlinear loss but at the cost of reduced differential phase shift and larger external magnetic bias fields. The calculations agree well with the experimental data.
ISBN:1424447534
9781424447534
ISSN:2164-3342