Magnetic tuning of cylindrical H01(delta)mode dielectric resonators
Abstract
The theory of magnetic tuning of cylindrical H01(delta) dielectric resonators is developed. It is based on rigorous solutions to the dielectric resonator systems containing microwave ferrites. It is shown that the most effective magnetic tuning of H01(delta) dielectric resonators can be accomplished by inserting a thin ferrite rod through an axial hole in the resonator. This kind of tuning utilizes the dependence of the parallel permeability tensor component micro(z) on the magnetic field applied. Experiments have been performed which show that a 4 percent tuning range can be attained with a Q factor of the resonant system of the order of 2000 at Xband. Using an appropriate DC magnetic field circuit, a 120 MHZ tuning bandwidth has been obtained with a consumption of tuning power of about 75 mW.
 Publication:

IEEE Transactions on Microwave Theory Techniques
 Pub Date:
 April 1989
 DOI:
 10.1109/22.18848
 Bibcode:
 1989ITMTT..37..743K
 Keywords:

 Cavity Resonators;
 Dielectrics;
 Magnetic Fields;
 Microwave Equipment;
 Resonant Frequencies;
 Tuning;
 Eigenvalues;
 Ferrites;
 Magnetic Shielding;
 Q Factors;
 RayleighRitz Method;
 Electronics and Electrical Engineering