Miniature annular dual-ridged corrugated integrated chamber

By using a double-ridged annular gap structure and 3D printing technology to manufacture a micro-annular gap double-ridged integrated cavity, the problems of high processing tolerance and cost of micro-annular gap cavities are solved, realizing the integration and lightweighting of high-performance micro atomic clocks.

CN121142938BActive Publication Date: 2026-04-07NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202511688652.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-04-07
Estimated Expiration
2045-11-18

AI Technical Summary

Technical Problem

Existing micro annular cavity technology has bottlenecks in terms of processing tolerance and cost, which limits the miniaturization and integration of dual resonant atomic clocks, especially the low yield and high cost of PCB printed micro annular cavities.

Method used

A micro-annular gap double-ridged wave structure design is adopted, which combines MEMS atomic gas cell and magnetic excitation structure. The integrated micro-annular gap double-ridged wave chamber is manufactured in one piece using 3D printing technology. It includes an inner annular gap structure, an outer cavity, connecting rod, ridged wave structure, etc. The ridged wave increases the equivalent wavelength of microwaves and optimizes the magnetic field distribution.

Benefits of technology

It achieves high performance and lightweight miniaturized chambers, reduces production costs, improves processing yield, and ensures high magnetic field uniformity and frequency stability, making it suitable for the mass production of high-performance integrated chambers.

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Abstract

The application discloses a micro annular double-ridged wave integrated chamber, which comprises an annular double-ridged wave microwave cavity, a MEMS atomic gas chamber, magnetic excitation, a dielectric matching layer and a tuning structure; the annular double-ridged wave microwave cavity is combined by an inner annular structure and an outer cavity through a connecting rod; the inner annular structure is used for forming equivalent inductance and equivalent capacitance of a resonant frequency; the outer cavity is used for forming an electromagnetic loop and an electromagnetic shield for the inner annular structure; periodic ridged wave structures are arranged on the inner walls of the inner annular structure and the outer cavity; the MEMS atomic gas chamber is integrated in the inner annular double-ridged wave microwave cavity; the magnetic excitation is used for exciting a microwave magnetic field to the annular double-ridged wave microwave cavity; and the dielectric matching layer is used for improving the edge axial magnetic field distribution of the micro chamber. The size of the pure metal annular cavity can be greatly reduced to millimeter level (<1 cm³), which is the same order of magnitude as the existing printed annular cavity technology.
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