采用螺旋结构的车载多频段高隔离度MIMO天线
By employing a spiral structure to connect the metal ground plane and introducing grounding stubs in the MIMO antenna, the problem of low isolation in the mid-to-low frequency range in the prior art is solved, thereby achieving improved isolation in the high-frequency and mid-to-low frequency ranges and miniaturization of the antenna.
CN116683183BActive Publication Date: 2026-07-17GUANGDONG UNIV OF TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG UNIV OF TECH
- Filing Date
- 2023-07-13
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing methods for improving MIMO antenna isolation by increasing the distance between ports cannot effectively improve isolation at mid-to-low frequencies.
Method used
A spiral structure is used to connect the first and second metal ground planes, forming a centrally symmetrical spiral structure. The current zero point of the spiral structure is used to reduce the mutual coupling between antenna elements, and grounding stubs are introduced in the antenna element design to improve isolation and stability.
Benefits of technology
It effectively improves the isolation of MIMO antennas in the low-to-mid frequency and high-frequency bands without increasing the port distance, which helps to miniaturize the antenna and improve impedance matching.
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Figure CN116683183B_ABST
Abstract
本发明涉及天线技术领域，尤其涉及一种采用螺旋结构的车载多频段高隔离度MIMO天线，设有第一天线单元、第二天线单元和螺旋结构；第一天线单元和第二天线单元为结构相同的直立天线；第一天线单元包括第一金属地板；第二天线单元包括第二金属地板；螺旋结构的一个轴向末端与第一金属地板连接，另一个轴向末端与第二金属地板连接；第一天线单元和第二天线单元关于螺旋结构中心对称。通过螺旋结构连接第一金属地板和第二金属地板，实现天线的共地状态，螺旋结构的中心位置会产生中低频的电流零点，使得中低频处的第一天线单元和第二天线单元之间的互耦性降低，从而有效提高了天线在高频段和中低频段的隔离度。
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