Patent ID: 7830229

Claim:
A coaxial resonator comprising: a core of dielectric material having a top, a bottom, and first, second, third and fourth side surfaces; at least one through-hole extending through the core between the top and bottom surfaces, the through-hole defining an inner surface and a resonator; a resonator pad surrounding the through-hole; a first contiguous unmetallized area located on the top surface and extending onto the first side surface; a second contiguous unmetallized area located on the top surface surrounding the resonator pad; a first metallized area located on the bottom surface, the side surfaces and the inner surface of the through-hole and contiguous with the resonator pad, a portion of the first metallized area extending onto the top surface in a relationship spaced and separate from the resonator pad and defining a first plurality of fingers; an electrode located on the first side surface and extending onto the top surface; and a second plurality of fingers extending from the electrode and interdigitated with the first plurality of fingers defined on the first metallized area.