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An efficient energetic variational principle for modeling one-port lossy gyrotropic YIG straight-edge resonators

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3 Author(s)
I. Huynen ; Univ. Catholique de Louvain, Belgium ; B. Stockbroeckx ; G. Verstraeten

This paper presents a new variational principle for the design of one-port gyrotropic magnetostatic-wave (MSW) resonators. We first prove the stationary character of the magnetic energy in the case of a resonator containing lossy gyrotropic media and supporting microwave MSW's. We then show that the variational expression may be successfully used for calculating the input reflection coefficient of a planar multilayered MSW straight-edge resonator (SER). Results obtained using the variational formulation are validated by experiment carried out at X-band. Hence, the resulting model is an efficient tool for designing low-noise wide-band yttrium-iron-garnet (YIG) tuned oscillators

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:46 ,  Issue: 7 )