Patent ID: 7808345

Claim:
A dielectric resonator comprising: first and second plate components having respective first and second principal center planes parallel with each other; and third and fourth plate components having respective third and fourth principal center planes parallel with each other and orthogonal to the respective first and second principal center planes of the first and second plate components, wherein a cross section of the dielectric resonator orthogonal to the first, second, third and fourth principal center planes has a substantially cruciform shape, wherein the first principal center plane of the first plate component and the second principal center plane of the second plate component are separated from each other, and a first TE01δ mode in which a first electric-field vector rotates within the first and second plate components and a second TE01δ mode in which a second electric-field vector rotates within the third and fourth plate components are coupled, wherein none of the plate components of the resonator are in direct contact with a conductive cavity, wherein the first principal center plane of the first plate component and the second principal center plane of the second plate component are separated from each other equally in opposite directions, and wherein the third principal center plane of the third plate component and the fourth principal center plane of the fourth plate component are separated from each other.