Ultra-wideband multi-section compound disc-cone antenna

By combining a segmented tapered surface with a spoke array composite structure, along with multi-layer disks and electrical loading, the contradiction between large electrical size in the low-frequency band and structural refinement in the high-frequency band of the ultra-wideband disk-cone antenna is resolved, achieving stable radiation and high efficiency in the 1.6MHz-6GHz frequency band.

CN121790743BActive Publication Date: 2026-07-03GUANGDONG BAIDU COMMUNICATIONS CO LTD
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Patent Information

Application Number
CN202610169313.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-05
Publication Date
2026-07-03
Estimated Expiration
2046-02-05

AI Technical Summary

Technical Problem

Existing ultrawideband disc-cone antennas struggle to reconcile the contradiction between large electrical size in the low-frequency band and structural refinement and mode purity in the high-frequency band on the same physical platform, making it difficult to achieve impedance matching, pattern stability, and size compression simultaneously.

Method used

A composite structure of segmented gradient conical surface and spoke array is adopted, combined with multi-layer coaxial disk, electric loading and hybrid impedance matching network, and effective low-frequency radiation and high-frequency pattern stability are achieved through chamfer transition and high conductivity surface treatment.

Benefits of technology

Stable omnidirectional radiation performance was achieved in the 1.6MHz-6GHz frequency band, with low VSWR, improved radiation efficiency, and maintenance of pattern stability and mode purity.

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Abstract

This invention belongs to the field of communication engineering technology, specifically an ultra-wideband multi-segment composite disc-cone antenna, comprising a radiator assembly, a feed assembly, an impedance matching assembly, and a grounding assembly. The radiator adopts a multi-segment composite structure, with a continuous copper plate conical surface in the low-frequency region and a radial spoke array in the high-frequency region, combined with a multi-layer coaxial disk and an electrically loaded structure. The feed end integrates a stepped impedance transformer and an LC composite matching network, and is equipped with a choke slot to suppress common-mode current. A wide grounding plane is configured at the bottom. By utilizing the segmented tapered surface and spoke array composite structure, the low-frequency continuous current path and the high-frequency discrete current path are separated on the same radiator, avoiding mutual interference between high- and low-frequency electromagnetic behaviors.
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