Patent ID: 8031036
Filing Date: 2011-10-04
Classification: H01P

Abstract:
1. 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 sidewall, said cavity having a longitudinal axis along which a length of the cavity is defined; (b) a resonator element comprising a cylindrical body positioned within the cavity along the longitudinal axis of the cavity along which a length of the resonator element is also defined; (c) a mounting flange formed in the resonator element around the cylindrical body, the mounting flange coupling the resonator element to the sidewall of the cavity at a mounting location along the length of the resonator element and providing a thermal path between the resonator element and the cavity to dissipate heat; and (d) the cavity and the resonator element having dimensions selected so that the electromagnetic energy associated with the resonator cavity is defined by an electromagnetic field pattern that substantially repeats itself at least twice along the length of the resonator element; wherein the resonator element is only in physical contact with the cavity through the mounting flange at the mounting location on the sidewall of the cavity where at least one resonant mode of the electromagnetic energy exhibits a local minima; and wherein the local minima resides within a plane that is orthogonal to the longitudinal axis of the cavity at the mounting location and wherein the mounting flange is coupled to the sidewall of the cavity along a circumferential area defined by a plane that is also orthogonal to the longitudinal axis of the cavity at the mounting location.