Speaker Module Antenna Layout for Tight RF Isolation
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Solution Overview
Problem
The challenge of designing antenna modules in electronic devices with limited space while meeting RF characteristics and multiple frequency bands is severe, especially when multiple communication systems are integrated.
Innovation Solution
A speaker module with a cavity body and a first antenna disposed on its outer surface, and a metal element with a first antenna branch partially overlapping its projection, enhancing RF characteristics and isolating nearby circuit elements, while a grounding element improves isolation between multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas and communication systems are integrated into electronic devices, then communication functionality and frequency band coverage are improved, but installation space and antenna clearance area are reduced
Solution Approach 1:
The patent combines the speaker module and antenna module into a single integrated structure. The antenna is disposed on the outer surface of the speaker module's cavity body, allowing both the speaker and antenna to occupy the same spatial region. This merging approach enables multiple communication systems to be integrated without proportionally increasing the device footprint, thus improving communication functionality while managing the limited antenna clearance area.
Solution Approach 2:
The patent utilizes the outer surface of the speaker module as a mounting platform for the antenna, effectively using the vertical/third dimension rather than only horizontal plane space. By disposing the antenna on the outer surface that extends along certain directions, the design transforms a two-dimensional space constraint into a three-dimensional solution, allowing multiple antennas to be arranged without excessive overlap in the plan view.
2Area of stationary object
If antenna elements are placed closer together to save space, then space utilization is improved, but interference between antennas increases
Solution Approach 1:
The grounding element serves as an intermediary between the antenna and the cavity body. It provides an electrical connection path that helps isolate the antenna from potential interference sources in the cavity body, while still allowing the antenna to be positioned close to other components. This mediator structure enables close spacing without excessive interference.
Solution Approach 2:
The patent applies different structural characteristics to different regions: the antenna is disposed on the outer surface with specific orientation, while the grounding element provides localized electrical connection and isolation. This local differentiation allows the antenna to be positioned in space-efficient locations while maintaining proper electromagnetic isolation where needed.
3Area of stationary object
If the antenna is disposed on the outer surface of the speaker module, then space utilization is improved, but the structural complexity of the speaker module increases
Solution Approach 1:
The outer surface of the speaker module's cavity body serves dual purposes: it acts as the structural housing for the speaker and simultaneously as the mounting platform for the antenna. This multi-functional design allows the same structural element to fulfill both speaker containment and antenna support functions, thereby improving space utilization without proportionally increasing structural complexity.
Solution Approach 2:
The antenna structure is segmented into multiple branches that extend along different directions on the outer surface. This segmentation allows each branch to be optimally positioned for its specific function while collectively forming a compact antenna system that fits within the available space without requiring a completely redesigned speaker module structure.
Data Source
AI summary
A speaker module includes a cavity body, a speaker element and a first antenna. The cavity body includes an outer surface, an inner surface and an accommodation space. The inner surface forms the accommodation space. The speaker element is disposed in the accommodation space. The first antenna is disposed on and extended along the outer surface.