Vehicle-mounted array antenna

By designing an on-board array antenna and using phase difference to control the direction of the electromagnetic field beam, the problem of uneven Bluetooth signal coverage on large vehicles was solved, achieving uniform electromagnetic field coverage and improved signal strength.

CN224481212UActive Publication Date: 2026-07-10YUANFENG TECH CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202520871113.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-30
Publication Date
2026-07-10
Estimated Expiration
2035-04-30

AI Technical Summary

Technical Problem

Existing in-vehicle Bluetooth signals in large vehicles suffer from interference from the tilted B-pillar and metal structure, resulting in signal radiation not reaching the area where people are close to the vehicle, thus affecting positioning accuracy and signal strength.

Method used

Design a vehicle-mounted array antenna that generates electromagnetic signals with a phase difference of 0-180 degrees through the radiating parts of the first and second antenna modules. Combined with a main power divider and a sub-power divider, it realizes downtilt adjustment and symmetrical coverage of the electromagnetic field beam.

Benefits of technology

It achieves downward tilting of the electromagnetic field beam to cover the area where people are close to vehicles, solving the problem of uneven signal coverage, reducing costs, and avoiding beam cancellation.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a vehicle-mounted array antenna, which comprises a circuit board and two antenna modules (comprising four radiation parts), and can control the direction of an electromagnetic field wave beam through the phase difference of 0-180 degrees between the two radiation parts so as to realize the adjustment of a wave beam angle. Specifically, in a vehicle-mounted scene, wave beam declination adjustment of an electromagnetic field can be realized, so that wave beams are radiated obliquely and downwards to cover an area where a person approaches a vehicle. By inputting the signals with the phase difference of 160-200 degrees between the two antenna modules, the currents flowing to the two antenna modules respectively can be in the same direction, and the phenomenon that electromagnetic field wave beams of the two antenna modules are offset is avoided. The coupler adopts an arrangement and folding design mode, so that the space occupation of a circuit board can be reduced, and the miniaturization design of the circuit board is facilitated. Through a power division network formed by a total power divider, a first power divider and a second power divider and an array antenna formed by four radiation parts which are symmetrically or relatively symmetrically arranged, a uniform field shape with electromagnetic field wave beam declination and omnidirectional coverage is finally realized.
Need to check novelty before this filing date? Find Prior Art