Magnetically Tunable Resonant Phase Shifters for UHF Band

Author

Belyaev, Boris A. ; Lemberg, Konstantin V. ; Serzhantov, Alexey M. ; Leksikov, Aleksandr A. ; Bal´va, Yaroslav F. ; Leksikov, Andrey A.

Author_Institution

Kirensky Inst. of Phys., Krasnoyarsk, Russia

Volume

51

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

5

Abstract

This paper presents a new type of magnetically tunable phase shifter. The shifter has the structure of microstrip bandpass filter on a substrate containing magnetic material whose magnetic permeability is controlled by magnetic field due to ferromagnetic resonance. The phase shifter´s operation is based on the fact that phase shift in a bandpass filter changes with tuning of its central frequency. Two types of devices were designed and fabricated for the UHF band. One of them has a five-layer NiFe film as an active medium and demonstrates a figure of merit of 40°/dB achieved already at 20 Oe of the controlling magnetic field in 10% of the relative operational bandwidth. The second device with YIG ferrite as an active medium gave 360° tunable phase shift in 5% operational bandwidth that corresponds to the figure of merit of 150°/dB (3.1°/dB·Oe).

Keywords

UHF filters; UHF phase shifters; band-pass filters; ferromagnetic resonance; iodine compounds; magnetic fields; magnetic materials; magnetic permeability; microstrip filters; nickel compounds; yttrium compounds; NiFe; UHF band; YIG; active medium; central frequency; ferromagnetic resonance; figure of merit; five-layer film; magnetic field; magnetic material; magnetic permeability; magnetically tunable resonant phase shifters; microstrip bandpass filter; relative operational bandwidth; Band-pass filters; Bandwidth; Ferrites; Films; Magnetic resonance; Phase shifters; Substrates; Ferrite; ferrite; microstrip structure; microwave; tunable phase shifter;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2368513

Filename

6949649