Patent ID: 8598970

Claim:
A resonator cavity for supporting a plurality of resonant modes and filtering electromagnetic energy, said resonator cavity comprising: (a) a cavity defined by a top end wall, a bottom end wall and a cylindrical sidewall, said cavity having a longitudinal axis along which a length of the cavity is defined; and (b) a resonator element having: (i) a cylindrical body defined by a top end and a bottom end, said cylindrical body positioned within the cavity along the longitudinal axis of the cavity along which a length of the resonator element is also defined; and (ii) a mounting flange formed in the resonator element around the cylindrical body at the bottom end of the cylindrical body and coupled to the bottom end wall of the cavity; wherein a complete bottom surface of the resonator element, including a bottom surface of the cylindrical body and a bottom surface of the mounting flange, is coupled to the bottom end wall of the cavity to provide a thermal path between the resonator element and the cavity for heat dissipation; wherein the cavity and the resonator element have dimensions selected so that the electromagnetic energy associated with the resonator cavity is defined by an electromagnetic field pattern that substantially repeats itself twice along the length of the resonator element.