Combo Antenna Module Gap Layout for Compact NFC and MST Performance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to develop a combo antenna module that maintains antenna performance comparable to conventional modules while being smaller in size, particularly for portable devices like foldable phones and wearable devices, and to prevent noise issues during wireless power transmission.
Innovation Solution
The combo antenna module adjusts the gap interval between magnetic sheets on the antenna sheet to optimize antenna performance, incorporates an expansion magnetic sheet under the connector cable to shield noise, and uses a metal sheet to cover gaps between magnetic sheets to prevent magnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the antenna is decreased to reduce mounting space, then the mounting space requirement is improved, but the antenna performance deteriorates due to decreased radiation pattern area and increased interference between different frequency bands
Solution Approach 1:
The antenna module is divided into multiple functional layers including antenna sheet, top magnetic sheet, and bottom magnetic sheet. Each layer is segmented into different regions (first projecting region, second projecting region, gap region) that serve specific functions for different frequency bands, allowing compact integration while maintaining performance
Solution Approach 2:
The patent transitions from planar antenna design to three-dimensional stacked architecture. Magnetic sheets are disposed on both top and bottom surfaces of the antenna sheet, utilizing the third dimension (vertical stacking) to increase effective radiation area without increasing footprint, thereby improving antenna performance while maintaining small size
2Volume of moving object
If magnetic sheets are disposed close together to reduce module size, then the mounting space is improved, but noise interference increases during wireless power transmission
Solution Approach 1:
A gap region is introduced as an intermediary space between the top magnetic sheet and bottom magnetic sheet. This gap acts as a magnetic field isolation barrier that prevents direct magnetic coupling between the sheets, thereby reducing noise interference during wireless power transmission while maintaining compact module dimensions
Solution Approach 2:
Different regions of the magnetic sheets are designed with different properties: projecting regions provide magnetic shielding for signal bands, while the gap region provides magnetic isolation for noise reduction. This local differentiation allows simultaneous optimization of signal transmission and noise suppression in different spatial zones
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
This configuration enhances antenna performance by allowing smooth magnetic field flow, reduces noise interference, and improves recognition rates and distances for MST and NFC frequencies, while also minimizing interference and ensuring reliability during bending tests.
Implementation Method 1
a top magnetic sheet disposed on an upper surface of the antenna sheet, and disposed adjacent to a first side of the antenna sheet, and a bottom magnetic sheet disposed on a lower surface of the antenna sheet
Implementation Method 2
interposing a metal sheet covering a gap region of magnetic sheets disposed on each of the top and bottom of an antenna sheet
Data Source
AI summary
Suggested is a combo antenna module configured to implement the same antenna performance as that of a combo antenna module having a general size, even in a state in which the size thereof is reduced by adjusting, within a set range, a distance at which magnetic sheets disposed on the top and the bottom of an antenna sheet are spaced apart. The suggested combo antenna module comprises: an antenna sheet; a top magnetic sheet disposed on the upper surface of the antenna sheet; and a bottom magnetic sheet disposed on the lower surface of the antenna sheet, wherein the top magnetic sheet includes a projecting region which overlaps with the bottom magnetic sheet while having the antenna sheet therebetween, and the top magnetic sheet and the bottom magnetic sheet are spaced apart at a distance within a set range at a side portion of the projecting region.