Slit-cut resonator for a vibratory gyroscope

A method of manufacturing a resonant structure comprising providing at least two coaxial rings, wherein:

• adjacent coaxial rings have adjacent peripheries and are attached together by a plurality of connection structures regularly arranged along the adjacent peripheries;
• and a first ring of said at least two rings has a first ring portion with a first radial thickness and a second ring portion, in a vicinity of a first connection structure, with a second radial thickness smaller than the first radial thickness;
• wherein the second ring portion is formed by a first radial recess developing from a periphery of the first ring distal from the first connection structure toward the first connection structure;
• wherein the first ring portion comprises at least two second radial recesses of identical radial lengths and arranged symmetrically with respect to the second ring portion, each of the at least two second radial recesses having at least a rectangular portion that develops radially from a periphery of the first ring that is in contact with the first connection structure;
• and wherein a sum of a radial length of the first radial recess and the radial length of any of the at least two second radial recesses is larger than the first radial thickness.