Magnetically tuned Zn2Z filters for the 18-40 GHz frequency range

Author

Reisch, F.E. ; Grant, R.W. ; Lind, M.D. ; Espinosa, G.P. ; Goldberg, I.B.

Author_Institution

Collins Radio Group, Rockwell International Dallas, Texas

Volume

11

Issue

5

fYear

1975

fDate

9/1/1975 12:00:00 AM

Firstpage

1256

Lastpage

1258

Abstract

Magnetically tunable filters operating in the 18-26.5 and 26.5-40 GHz frequency ranges have been constructed with spherical single crystal Ba3Zn2- Fe24O41(Zn2Z) resonators. Substantial reduction in the external magnetic field required for resonance (Ho) has been achieved by making use of the large anisotropy field (Ha) of Zn2Z. The design and performance of two-resonator Zn2Z filters which tune the 18-26.5 and 26.5-40 GHz frequency ranges are described. By using measured values for the saturation magnetization (Ms), Ha, and resonance linewidth (ΔH), the calculated filter 3 dB bandwidth (BW) and loss are 220 MHz and 6.4 dB respectively at 26.5 GHz. Experimentally measured filter performance characteristics reported herein are in substantial agreement with these calculations.

Keywords

Ferrite filters; Microwave filters; Millimeter-wave filters; Frequency; Iron; Magnetic anisotropy; Magnetic fields; Magnetic resonance; Magnetic separation; Perpendicular magnetic anisotropy; Resonator filters; Saturation magnetization; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1975.1058916

Filename

1058916