Flexible PCB Antenna Module for Smartphone Space Constraints
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Solution Overview
Problem
The limited space in smartphones for NFC and MST antennas due to existing wireless communication components, such as batteries and metal housings, requires innovative antenna design and layout to optimize performance without interference.
Innovation Solution
A flexible PCB with integrated coil antennas and a magnetic sheet, arranged in a specific configuration to minimize space usage and interference, allowing for efficient NFC and MST operations within the smartphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication components (battery, metal housing, existing antennas) are installed in smartphones, then wireless communication functionality is provided, but available space for additional antennas (NFC, MST) is reduced
Solution Approach 1:
The patent combines multiple antenna functions (NFC and MST antennas) into a single integrated structure on one flexible PCB. The first coil serves as NFC antenna and the second coil serves as MST antenna, both sharing the same substrate and spatial arrangement, thereby reducing the total area occupied while maintaining multiple wireless communication capabilities
Solution Approach 2:
The patent implements a nested arrangement where the first coil (NFC antenna) and second coil (MST antenna) are positioned in overlapping or adjacent regions on the flexible PCB. The coils are arranged to utilize the same physical space efficiently, with one coil effectively nested within or alongside the other, maximizing space utilization
2Adaptability or versatility
If multiple antennas are installed in limited smartphone space, then wireless communication versatility is improved, but antenna performance and layout design complexity increase
Solution Approach 1:
The flexible PCB serves as a universal platform that hosts multiple antenna types (NFC and MST) with different functional requirements. The standardized flexible PCB structure provides a common interface and mounting mechanism for both antenna types, simplifying the overall design process while enabling multi-functionality
Solution Approach 2:
The patent divides the antenna system into separate functional modules (first coil for NFC, second coil for MST) that are independently designed and then integrated on the flexible PCB. This segmentation allows each antenna to be optimized for its specific function while maintaining a unified overall structure that simplifies layout design
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 solution enables effective integration of NFC and MST antennas within the constrained smartphone environment, enhancing wireless communication capabilities while reducing interference from metal components.
Implementation Method 1
a magnetic sheet comprising a first sheet portion, a second sheet portion and a third sheet portion... the first sheet portion is located on the side of the first major surface and overlaps the first coil segment of the first coil... the second sheet portion interposed between the first and third sheet portions is located on the side of the second major surface and overlaps both the second coil segment of the first coil and the second coil segment of the second coil
Data Source
AI summary
A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NFC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.