Compact cross orthogonal scanning multilayer millimeter wave multi-beam array antenna

By adopting a dual-port common cavity Rotman lens feed network structure and common diameter antenna layer in multi-beam antenna, the problems of high return loss and low port isolation in orthogonal scanning are solved, and a compact orthogonal scanning multi-layer millimeter wave multi-beam array antenna is realized, improving work efficiency and system integration.

CN119726106AActive Publication Date: 2025-03-28NANJING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411878639.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-03-28
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

When existing multi-beam antennas realize orthogonal scanning, there are problems such as high return loss, serious incident wave reflection, and low port isolation, resulting in high system integration and low working efficiency.

Method used

Using a dual-port common cavity Rotman lens feed network structure and a common diameter antenna layer, a compact cross-orthogonal scanning multi-layer millimeter wave multi-beam array antenna is realized through the integration of the slot antenna layer and the patch antenna layer. This design improves the isolation and working efficiency between ports through the work-type dual-port feed structure and multi-layer gap coupling.

Benefits of technology

It effectively reduces the return loss of each port, reduces the reflection of incident waves at edge ports, improves the isolation between ports, realizes a compact orthogonal scanning system, and improves work efficiency and system integration.

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Abstract

The invention discloses a compact cross orthogonal scanning multilayer millimeter wave multi-beam array antenna, which comprises a dual-port common-cavity Rotmann lens feed network structure and a common-caliber antenna layer, and is characterized in that the dual-port common-cavity Rotmann lens feed network structure is located at a bottom layer, and the common-caliber antenna layer is located above the common-cavity Rotmann lens feed network structure; the common-aperture antenna layer comprises a slot antenna layer and a patch antenna layer, the slot antenna layer is located at the bottom layer, and the patch antenna layer is located above the slot antenna layer. According to the invention, the return loss of each port is reduced, the reflection of incident waves at the edge ports is reduced, the isolation degree between the ports and between the two sub-lenses is increased, and the working efficiency is improved.
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