Antenna Module With Slot Grounds For 5G Isolation
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Solution Overview
Problem
In 5G mobile communication, achieving good isolation between multiple antennas placed in the same axial direction while maintaining high antenna efficiency is a challenge.
Innovation Solution
The antenna module design includes a configuration where the first ground with a slot is located between the first and second antennas, and a second ground with a slot is between the second and third antennas, with non-parallel extensions and specific slot dimensions to enhance isolation, and additional retaining walls and a metal member for improved radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are placed in the same axial direction for 5G mobile communication, then the antenna coverage and communication capability are improved, but the isolation between antennas deteriorates
Solution Approach 1:
The patent changes the arrangement from a one-dimensional linear sequence to a two-dimensional planar configuration with non-parallel extensions. The first, second, and third antennas are arranged such that their extension directions form angles with each other (specifically, the angle between first and second antenna extension directions is 45-75 degrees, and between second and third antenna extension directions is 45-75 degrees), effectively utilizing spatial dimensionality to achieve both good coverage and isolation.
Solution Approach 2:
The patent introduces ground structures with slots as intermediary elements between the antennas. The first ground with a first slot is positioned between the first and second antennas, and the second ground with a second slot is positioned between the second and third antennas. These intermediary ground structures with specific slot dimensions (first slot: 12-15mm length × 4-6mm width; second slot: 22-26mm length × 0.5-1.5mm width) act as isolation barriers while maintaining electrical connectivity through conductive members.
2Volume of moving object
If antennas are placed closer together to reduce device size, then the compactness is improved, but the antenna efficiency deteriorates
Solution Approach 1:
The patent applies different structural characteristics to different regions of the antenna system. The ground structures have specific local features including slots with precise dimensions (first slot: 12-15mm length × 4-6mm width; second slot: 22-26mm length × 0.5-1.5mm width) and retaining walls at specific locations. These localized structural variations optimize the electromagnetic field distribution in each region, maintaining antenna efficiency despite compact spacing.
Solution Approach 2:
The patent optimizes specific parameters including the angles between antenna extension directions (45-75 degrees), the dimensions of slots in ground structures, and the distances between antenna elements (80-100mm between first and second antennas, 15-20mm between second and third antennas). By carefully controlling these parameters, the patent achieves good isolation and efficiency in a compact form factor.
Data Source
AI summary
An antenna module, including a first antenna, a second antenna, a first ground, a third antenna, and a second ground, is provided. The first ground is located between the first antenna and the second antenna and is connected to the first antenna and the second antenna. The first ground has a first slot near the first antenna. The second antenna is located between the first antenna and the third antenna. An extension direction of the first antenna is not parallel to an extension direction of the second antenna. The extension direction of the second antenna is not parallel to an extension direction of the third antenna. The second ground is located between the second antenna and the third antenna and is connected to the third antenna. The second ground is separated from the first ground and the second antenna, and has a second slot.