Тип публикации: статья из журнала
Год издания: 2015
Идентификатор DOI: 10.1109/TMAG.2014.2368513
Ключевые слова: Ferrite, microstrip structure, microwave, tunable phase shifter, Bandpass filters, Bandwidth, Magnetic fields, Magnetic materials, Magnetic permeability, Magnetism, Microwaves, Phase shift, Phase shifters, UHF devices, Active medium, Central frequency, Figure of merits, Microstrip band-pass filter, Microstrip structures, Operational bandwidth, Resonant phase shifters, Tunable phase shifters, Microstrip filters
Аннотация: 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 shiftПоказать полностьюin 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 degrees/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 degrees tunable phase shift in 5% operational bandwidth that corresponds to the figure of merit of 150 degrees/dB (3.1 degrees/dB.Oe).
Журнал: IEEE TRANSACTIONS ON MAGNETICS
Выпуск журнала: Vol. 51, Is. 6
ISSN журнала: 00189464
Место издания: PISCATAWAY
Издатель: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC