Multi-Board Antenna Layout to Reduce Earbud Ground Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
True wireless earphones face challenges in configuring antennas within limited internal space without compromising performance, as they require various electronic components that occupy significant space.
Innovation Solution
The antenna module design includes a first board, a connecting board, a second board, an antenna radiator, and a circuit reference ground, where the antenna radiator extends along the connecting and second boards, and the circuit reference ground extends along the first, second, and connecting boards, with a defined interval to reduce coupling effects, allowing for efficient space utilization and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the antenna is configured in the limited internal space of the earphone, then the space utilization is improved, but the antenna performance deteriorates due to coupling effects and space constraints
Solution Approach 1:
The antenna radiator is configured to extend along the extending direction of the connecting board and second board, utilizing the third dimension (depth/length along the board extension) rather than only the planar area. This dimensional transition allows the antenna to achieve sufficient radiation length and performance while fitting within the constrained internal space of the earphone, resolving the contradiction between space utilization and antenna performance.
Solution Approach 2:
The connecting board serves as an intermediary structure that carries the antenna radiator between the first board and second board. This intermediary configuration allows the antenna to be distributed across multiple boards, reducing coupling effects with the circuit reference ground while maintaining compact overall dimensions, thus improving both space utilization and antenna performance.
2Area of stationary object
If the antenna radiator is placed close to the circuit reference ground, then the space utilization is improved, but the coupling effect increases causing performance deterioration
Solution Approach 1:
The antenna radiator extends along the extending direction of the boards, utilizing the length dimension rather than only the planar area. This allows the antenna to achieve sufficient radiation length while maintaining adequate spacing from the circuit reference ground in the planar view, thereby reducing coupling effects while preserving space utilization efficiency.
3Reliability
If the antenna radiator is distributed on multiple boards, then the coupling effect is reduced improving performance, but the device complexity increases
Solution Approach 1:
The antenna radiator is merged with the connecting board and second board structure, extending continuously along their extending directions. This integration allows the antenna to be distributed on multiple boards while maintaining a unified, simplified structure rather than separate antenna components, thereby improving antenna performance through reduced coupling without significantly increasing device complexity.
Data Source
AI summary
An antenna module includes a first board, a connecting board, a second board, an antenna radiator, and a circuit reference ground. The first board at least includes a first end. The connecting board has a first and a second connection end. The second board includes a second end and a bottom end. The second board and the connecting board are made of different materials.The antenna radiator extends along the extending direction of the connecting board and the second board, and defines a first and a second radiation end. The circuit reference ground extends along the extending direction of the first board, the connecting board, and the second board, and defines a first reference end formed on the first board and a second reference formed on the second board. The circuit reference ground and the antenna radiator are spaced apart and form an interval.