Title :
Theoretical and experimental evidence of nonreciprocal effects on magnetostatic forward volume wave resonators
Author :
Huynen, I. ; Verstraeten, G ; Vorst, A. Vander
Author_Institution :
Microwaves UCL, Louvain-La-Neuve, Belgium
fDate :
6/1/1995 12:00:00 AM
Abstract :
An unexpected nonreciprocal behavior is observed on Magnetostatic Forward Volume Waves (MSFVW) Straight Edge Resonators (SER´s) using YIG films. The nonreciprocal effect is theoretically predicted by taking into account the demagnetizing effect of the DC biasing magnetic field when calculating the forward and reverse propagation constants of MSFVW inside the YIG film. Hence, a nonreciprocal scattering matrix of the MSFVW-YIG-SER coupled to its transducers is calculated. The measured values of the transmission coefficients agree extremely well with the predicted ones. They both present an important nonreciprocal phase behavior
Keywords :
S-matrix theory; demagnetisation; garnets; magnetic microwave devices; magnetostatic wave devices; magnetostatic waves; resonators; yttrium compounds; DC biasing magnetic field; MSW devices; YFe5O12; YIG; YIG films; demagnetizing effect; magnetostatic forward volume wave resonators; nonreciprocal effects; nonreciprocal phase behavior; nonreciprocal scattering matrix; straight edge resonators; transmission coefficients; Demagnetization; Dispersion; Electrical capacitance tomography; Frequency synthesizers; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetostatic waves; Propagation constant; Transducers;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
