Integrated omnidirectional antenna and digital key product thereof

By designing an integrated omnidirectional antenna, optimizing the parasitic stubs of the first and second antenna modules, and combining a dipole-shaped layout, the compatibility issues of BLE and UWB antennas were resolved, achieving omnidirectional uniform coverage and stable connection distance, while reducing production costs.

CN224355440UActive Publication Date: 2026-06-12YUANFENG TECH CO LTD
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Patent Information

Application Number
CN202520871095.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-30
Publication Date
2026-06-12
Estimated Expiration
2035-04-30

AI Technical Summary

Technical Problem

In existing technologies, the antenna field pattern of digital key products integrating BLE and UWB technologies is not round enough, resulting in uneven radiation patterns, unbalanced spacing, and unstable connection distances in various directions.

Method used

Design an integrated omnidirectional antenna, employing a first antenna module and a second antenna module. By adjusting the length, position, and distance of parasitic stubs, the resonant frequency and field shape of the antenna modules are optimized. Combined with a dipole-shaped layout, omnidirectional uniform coverage is ensured.

Benefits of technology

It achieves an improvement in omnidirectional performance, with the antenna field shape having a non-circularity of less than 5dB on the horizontal plane, stable connection distances in all directions, solves the compatibility issues between BLE and UWB antennas, and significantly reduces production costs.

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Patent Text Reader

Abstract

The utility model discloses an integrated omnidirectional antenna and a digital key product thereof. The integrated omnidirectional antenna comprises a circuit board, a first antenna module and a second antenna module. The first antenna module and the second antenna module form an integral system, on the premise that the isolation degree is met, the first parasitic branch knot serves as a part of the environment, and on the premise that the out-of-roundness of the first antenna module is met, the field shape of the second antenna module is improved. The second antenna module can adopt a dipole form, namely, the second antenna module is symmetrically arranged in the left-right direction or relatively symmetrically arranged. The first parasitic branch serves as a parasitic branch of the first main radiation branch and is used for increasing the roundness of the antenna field shape. The resonant frequency and the parasitic current of the parasitic branch knot can be changed by adjusting the length and the position (namely the swing radian) of the first parasitic branch knot, the distance between the first parasitic branch knot and the main radiation branch knot and the like, so that the antenna field pattern defects generated by the first antenna module and the second antenna module are overcome; finally, radiation patterns with small out-of-roundness (less than 5dB) are generated on the horizontal plane, and the omnidirectional performance is improved.
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