Patent ID: 7378925

Claim:
A dielectric resonator which has an effective resonant area extending in three dimensions and confining electromagnetic waves, wherein the dielectric resonator comprises at least one coupling element, and the at least one coupling element comprises: at least one slot formed on at least one conductive surface extending in two dimensions on at least a part of peripheral surface of the effective resonant area; and at least one patch conductive area adjacent to the at least one slot, wherein an inside of the effective resonant area comprises a dielectric substance, a periphery of the effective resonant area comprises a first conductive layer extending on a first surface of a dielectric substrate, a second conductive layer extending on a second surface of the dielectric substrate, and a plurality of conductive structures, a space between adjacent conductive structures is not greater than ½ of a wave length of the electromagnetic waves at a resonant frequency, the at least one conductive surface comprises the first conductive layer, at least one apertural part is formed on an area of the second conductive layer corresponding to an area of the first conductive layer where the at least one coupling element exists; the at least one apertural part comprises a plurality of apertural parts with different sizes; and the plurality of apertural parts is arranged in a concentric fashion.