3Fay C E, Comstock r L. Operation of the Ferrite Junction Circulator. Microwave and Techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1965, 13: 15-27.
4Helszahn J, James D S. Circulators Using Planar Triangular Resonators. Microwave and Techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1979, 27: 188-193.
5Helszahn J, James D S. Planar tri-angular resonators with magnetic walls microwave and techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1978, 26: 95-100.
6Fay C E, Comstock r L. Operation of the Ferrite Junction Circulator. Microwave and Techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1965, 13: 15-27.
7Helszahn J, James D S. Circulators Using Planar Triangular Resonators. Microwave and Techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1979, 27: 188-193.
8Helszahn J, James D S. Planar tri-angular resonators with magnetic walls microwave and techniques[J]. IEEE Transaction on Microwave Theory and Techniques, 1978, 26: 95-100.
9BOSMA H.On the principle of stripline circulator[J].IEE Electronic and Communication Engineering,1962,109 (21):137-146.
