Patent ID: 9083263
Filing Date: 2015-07-14
Classification: E21B,H01L,H02N,H03B,H03H,H03L

Abstract:
1. An apparatus, comprising: a resonator; a first cap coupled to a first side of the resonator to define a first cavity; a second cap coupled to a second side of the resonator to define a second cavity, the resonator, the first cap and the second cap having substantially identical thermal expansion coefficients, wherein the first cavity and the second cavity provide a first vacuum in which the resonator is to resonate; a vacuum chamber surrounding the resonator, the first cap and the second cap, the vacuum chamber to provide a second vacuum in which the resonator, the first cap and the second cap are disposed, wherein the resonator is a dual-mode resonator, wherein a frequency of resonance of the resonator in the first vacuum and the second vacuum is to provide a time reference for dynamic calibration using an analytical thermal stress model, wherein the first cap, the second cap and the resonator have substantially identical crystal orientations; and a first electrode and a second electrode, a first portion of the first electrode substantially ring-shaped and disposed on a first circumferential surface of the first cap, a second portion of the second electrode substantially ring-shaped and disposed on a second circumferential surface of the second cap, wherein the first electrode and the second electrode are cylindrically shaped and symmetric relative to a longitudinal axis of the apparatus for enabling heat propagation paths through the first electrode and the second electrode.