Dual Camera FPC Layout for Antenna Interference Reduction
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Solution Overview
Problem
Dual-camera modules in mobile terminals experience signal interference due to the close proximity of flexible printed circuits (FPCs) to antenna clearance zones, leading to distortion in signal transmission.
Innovation Solution
The dual-camera module assembly is designed with FPCs that have connecting ends configured to maintain a minimum distance from the antenna clearance zone, ensuring reduced interference by extending the FPCs in specific directions and using reinforcement boards and mounting racks for structural stability and interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the FPC is positioned close to the antenna clearance zone to reduce device size, then the device occupies less space, but signal interference increases causing transmission distortion
Solution Approach 1:
The FPC is designed with an extension portion that changes its spatial arrangement by extending in a direction away from the antenna clearance zone. This dimensional repositioning allows the FPC to maintain functional proximity to the camera module while achieving sufficient distance from the antenna zone, thereby reducing signal interference without significantly increasing overall device volume.
Solution Approach 2:
The FPC is divided into distinct sections: a first body connected to the camera module, and an extension portion that bridges to the second connecting end. This segmentation allows different parts of the FPC to serve different spatial functions, with the extension portion specifically positioned to avoid the antenna clearance zone while maintaining electrical connectivity.
2Object-affected harmful factors
If the FPC is extended to increase distance from the antenna clearance zone, then signal interference is reduced, but the FPC structure becomes more complex
Solution Approach 1:
The extension portion is integrated as a continuous part of the FPC structure, merging the functional requirements of both distance maintenance and electrical connectivity into a single unified component. This integration avoids the need for separate shielding structures or additional routing paths, thereby reducing overall structural complexity while achieving the desired interference mitigation.
Data Source
AI summary
A dual-camera module assembly includes a first flexible printed circuit (FPC), a second FPC, a first camera module and a second camera module. The first FPC includes a first body and a first connecting end, the first body being connected to the first camera module. The second FPC includes a second body, and an extension portion and a second connecting end sequentially extending from the second body, the second body being connected to the second camera module, the extension portion and the first body are arranged in a superposition manner. The first connecting end and the second connecting end are connected to a main circuit board. A smallest one of distances from the first connecting end to an antenna clearance zone of the main circuit board and distances from the second connecting end to the antenna clearance zone is greater than or equal to a predetermined value.