Complex gyrator circuits of planar circulators using higher order modes in a disk resonator
Abstract
The complex gyrator circuit of a planar junction circulator using higher order solutions in a disk resonator is investigated. While the first such solution exhibits many of the features of weakly magnetized junctions using the dominant mode in a disk resonator, its loaded Qfactor is incompatible with the realization of quarterwave coupled devices. The second solution requires impractically large magnetization at mmfrequencies. A circulator configuration whose frequency response resembles that of a quarterwave coupled one is that in which the inphase eigennetwork is degenerate with those of the demagnetized counterrotating eigennetworks. The degeneracy between the mode of the inphase limit and that of the secondorder counterrotating limit, in an oversized, irregular hexagonal resonator, is presently used to construct such a device.
 Publication:

IEEE Transactions on Microwave Theory Techniques
 Pub Date:
 November 1983
 DOI:
 10.1109/TMTT.1983.1131634
 Bibcode:
 1983ITMTT..31..931H
 Keywords:

 Cavity Resonators;
 Circulators (Phase Shift Circuits);
 Field Mode Theory;
 Gyrators;
 Network Analysis;
 Q Factors;
 Disks (Shapes);
 Eigenvalues;
 Electrical Impedance;
 Frequency Response;
 Magnetization;
 Microwave Coupling;
 Millimeter Waves;
 Planar Structures;
 Resonant Frequencies;
 Electronics and Electrical Engineering