6-18 GHz Edge Mode Isolator

A stripline geometry with high permeability pole pieces in contact with the upper and lower ground planes minimized the magnetic internal field non-uniformity that can degrade performance at low frequencies. A commercially available ferrite with 4πM=3440 gauss gave optimum isolator performance. YIG...

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Bibliographic Details
Published in2007 IEEE/MTT-S International Microwave Symposium pp. 687 - 690
Main Authors Adam, J.D., Stitzer, S.N., Gaglione, N.S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2007
Subjects
Dielectric materials
edge-mode
Ferrite
Ferrites
Frequency
Gaussian processes
isolator
Isolators
Magnetic materials
Magnetostatic waves
microwave
Permanent magnets
Soft magnetic materials
Stripline
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Summary:A stripline geometry with high permeability pole pieces in contact with the upper and lower ground planes minimized the magnetic internal field non-uniformity that can degrade performance at low frequencies. A commercially available ferrite with 4πM=3440 gauss gave optimum isolator performance. YIG sections at the input and output with 4πM=1780 gauss minimized low frequency loss due to excitation of magnetostatic waves. The calculated S 12 was ~ldB from 4GHz to 20GHz with S 21 exceeding -20dB from 6GHz to 17GHz. Measured S 21 , was >-3dB from 7GHz to 19GHz. S 12 , was <-10dB from 6GHz to 20GHz.
ISBN:1424406870
9781424406876
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2007.380013