Title :
Tunability of microstrip ferrite resonator in the partially magnetized state
Author :
Dionne, Gerald F. ; Oates, Daniel E.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
A theoretical analysis is presented for a microstrip ferrite resonator of microwave frequency νr that is tunable by varying the state of magnetization. Measurements at 8 GHz indicate a 5% tunability range for a magnetic field H <50 Oe. Calculations of ν r as a function of H are fitted closely to data. Computed performance estimates of a superconducting resonator with an ideal magnetic structure project a remanent-state tunability limit of 25% and an X-band figure of merit of 7000 for a Q factor of 104
Keywords :
Q-factor; demagnetisation; ferrite devices; magnetic hysteresis; magnetic microwave devices; magnetic permeability; microstrip resonators; remanence; tuning; 8 GHz; Q factor; X-band figure of merit; demagnetizing factor; hysteresis loops; ideal magnetic structure project; magnetization state variation; microstrip ferrite resonator; microwave frequency; partially magnetized state; reciprocal permeability; remanent-state tunability limit; superconducting resonator; tunability range; Ferrites; Magnetic analysis; Magnetic field measurement; Magnetization; Microstrip components; Microstrip resonators; Microwave frequencies; Q factor; Superconducting magnets; Superconducting microwave devices;
Journal_Title :
Magnetics, IEEE Transactions on
