Dual-band dual-polarization planar base station antenna

CN122315330APending Publication Date: 2026-06-30ZHONGTIAN COMM TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGTIAN COMM TECH CO LTD
Filing Date
2026-06-01
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing base station antennas, when implementing dual-frequency dual-polarization functions, have high profiles and complex structures, making it difficult to meet the requirements of 5G base stations for antenna miniaturization, low profile, and low cost.

Method used

The design employs a combination of differential feed network and back-to-back U-shaped slots. The differential feed network enables efficient signal distribution and impedance matching, while the differentiated size design of the back-to-back U-shaped slots achieves independent coverage of dual frequency bands. The radiation slots and feed network are distributed in a rotationally symmetrical manner with respect to the center of the ground plane, ensuring the consistency of radiation characteristics in all directions.

Benefits of technology

It achieves high-performance dual-frequency dual-polarization in a low-profile structure, simplifies the structure, adapts to miniaturization requirements, and improves system capacity and anti-interference capability.

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Abstract

This application provides a dual-band dual-polarized planar base station antenna, comprising a dielectric substrate and a metal layer. A differential feed network is provided on one side surface of the dielectric substrate. The differential feed network includes four differential input feed line branches, which are arranged in pairs and are centrally symmetrical with respect to the center of the dielectric substrate. Each differential input feed line branch has a first output feed line on one side and a second output feed line on the other side. The metal layer is disposed on the side of the dielectric substrate opposite to the differential feed network and has multiple first and second radiation slots with opposite opening directions arranged in pairs. The dielectric substrate has metallized vias penetrating both sides. Each first output feed line is connected to a second radiation slot through the metallized via. Each second output feed line is connected to a first radiation slot through the metallized via. The dual-band dual-polarized planar base station antenna provided by this application has a low profile and simple structure, making it more suitable for miniaturization requirements.
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