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Self-biased circulator/isolator at millimeter wavelengths using magnetically oriented polycrystalline strontium M-type hexaferrite

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4 Author(s)
Zuo, Xu ; Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA ; How, H. ; Somu, S. ; Vittoria, Carmine

A self-biased circulator/isolator operating at millimeter wavelength has been designed, fabricated, and tested. The ferrite material used in the device, magnetically oriented polycrystalline strontium M-type hexaferrite (SrFe12O19, SrM), was characterized by vibrating sample magnetometer and ferromagnetic resonance. The measurement of S-parameters indicated that at 41 GHz, the isolation was 28 dB and the insertion loss was 4 dB.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 5 )