Antenna System With Anisotropic Decoupling Assembly
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Solution Overview
Problem
In mobile terminals, the strong coupling between antennas due to their close proximity and the presence of many electronic elements limits the effectiveness of existing slit-based decoupling methods, resulting in poor antenna isolation and efficiency.
Innovation Solution
A decoupling assembly with electrical anisotropy is introduced, comprising a laminated structure of materials with different permittivities, alternately stacked and disposed on the antenna radiation surface, which adjusts the antenna radiation directions to improve isolation and reduce coupling between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slit is disposed on a ground plate between antennas to reduce coupling, then isolation between antennas is improved, but the effect is poor because the slit is easily affected by surrounding electronic elements
Solution Approach 1:
The patent introduces a decoupling assembly as an intermediary structure between the antennas and the surrounding electronic elements. This assembly includes a first decoupling structure and a second decoupling structure that form a shielded cavity, acting as a mediator to isolate the antennas from external interference while maintaining their isolation from each other.
Solution Approach 2:
The patent changes the electromagnetic parameters by introducing the decoupling assembly with specific permittivity characteristics. The assembly modifies the effective permittivity in the region between antennas, transforming the electromagnetic field distribution to reduce coupling and improve isolation performance.
2Productivity
If multiple antennas are centrally disposed in a relatively small area to improve signal throughput rate, then MIMO antenna technology effectiveness is improved, but coupling between antennas becomes relatively strong
Solution Approach 1:
The patent segments the space between antennas by introducing a decoupling assembly that divides the electromagnetic field region. This segmentation creates separate zones for each antenna, reducing their mutual coupling while allowing them to remain in close proximity for MIMO operation.
Solution Approach 2:
The decoupling assembly serves as a mediator structure positioned between the antennas, providing electromagnetic isolation while allowing the antennas to maintain their close central disposition for high-speed data transmission in MIMO systems.
3Reliability
If a decoupling assembly with electrical anisotropy is introduced to adjust antenna radiation directions, then isolation between antennas is improved, but device complexity increases
Solution Approach 1:
The patent employs composite material structures in the decoupling assembly, combining materials with different electromagnetic properties to achieve the desired electrical anisotropy. This allows the complex electromagnetic function to be realized through material composition rather than geometric complexity.
Solution Approach 2:
The patent achieves the decoupling function by changing the electromagnetic parameters (permittivity) of the decoupling assembly rather than through complex geometric arrangements. The electrical anisotropy is achieved through material property selection, simplifying the overall structure while maintaining effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The decoupling assembly effectively enhances antenna isolation and radiation efficiency by altering the effective permittivity in different directions, allowing for better directionality and reduced interference, thus improving the overall performance of the antenna system without the need for redesigning the decoupling structure for different frequency bands.
Implementation Method 1
the decoupling assembly has electrical anisotropy, and the electrical anisotropy indicates that an effective permittivity of the decoupling assembly has different components in different directions
Implementation Method 2
the decoupling assembly is configured to adjust antenna radiation directions of the first antenna and the second antenna
Data Source
Figure 1~2(d)
Figure 3~4
Figure 5(a)~5(b)
AI summary
This application discloses an antenna system, and belongs to the antenna field. The antenna system includes: a ground plate, at least one antenna pair disposed on the ground plate, and a decoupling assembly disposed on a radiation surface of the antenna pair; where the antenna pair includes a first antenna and a second antenna; the decoupling assembly has electrical anisotropy, and the electrical anisotropy indicates that an effective permittivity of the decoupling assembly has different components in different directions; the decoupling assembly is configured to adjust antenna radiation directions of the first antenna and the second antenna; and isolation between the first antenna and the second antenna after adjustment is greater than isolation between the first antenna and the second antenna before adjustment. In this application, the following problem is resolved: A poor effect is achieved when coupling between antennas is reduced by using a slit because there are many electronic elements in a mobile terminal and the slit is easily affected by surrounding electronic elements. Antenna radiation directions of the antennas are changed by using the decoupling assembly disposed on the radiation surface of the antenna pair, thereby improving isolation between the antennas and antenna radiation efficiency.