Toroidal resonators with small frequency mismatch for rate integrating gyroscopes

This paper reports an order of magnitude reduction in frequency mismatch (ΔF) in polycrystalline diamond half-toroid resonators under development for use as microscale rate-integrating gyroscopes. The reduction in ΔF was achieved by eliminating the lip at the perimeter of the resonator. Measurements of resonance decay time as a function of frequency, temperature, and pressure are also reported.