Multi Loop Antenna Module for Metallic Rear Cover Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable terminals with metallic rear covers experience deteriorated NFC antenna performance due to the metal's interference with the non-metallic areas where antennas are mounted, leading to reduced communication effectiveness.
Innovation Solution
A multi loop antenna module is designed with an antenna sheet featuring a radiation pattern of two or more loops and a magnetic sheet mounted on the rear side, overlapping non-metallic areas around holes in the rear cover, enhancing radiation field generation and antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an antenna is mounted on a non-metallic area around holes in a metallic rear cover, then the antenna can be installed in a portable terminal with a metallic rear cover, but the antenna performance is deteriorated due to metal interference
Solution Approach 1:
The antenna sheet is divided into multiple loops (first loop, second loop, third loop) that are segmented and positioned at different locations. This segmentation allows each loop to interact differently with the metallic rear cover, reducing the overall interference effect while maintaining installation compatibility
Solution Approach 2:
The antenna structure uses nested loops where the first loop, second loop, and third loop are positioned concentrically or overlappingly. The magnetic sheet is also nested within the antenna sheet structure. This nesting creates multiple radiation patterns that can compensate for metal interference through constructive interference effects
2Ease of manufacture
If a single loop antenna design is used, then the antenna structure is simple and easy to manufacture, but the radiation field is insufficient leading to poor communication performance
Solution Approach 1:
Multiple loops (first loop, second loop, third loop) are merged into a single antenna sheet structure that can be manufactured as one integrated component. The magnetic sheet is also merged with the antenna sheet. This combining maintains manufacturing simplicity while achieving enhanced radiation field through the cooperative effect of multiple loops
Solution Approach 2:
The antenna design transitions from a single two-dimensional loop to a multi-loop structure with overlapping areas creating three-dimensional radiation patterns. The nested loops add spatial dimensionality to the radiation field, enhancing communication performance without significantly increasing manufacturing complexity
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 multi loop antenna module significantly improves antenna performance by generating a larger radiation field compared to single loop designs, even on metallic rear covers, thereby enhancing communication capabilities.
Implementation Method 1
a magnetic sheet mounted on a rear side of the antenna sheet
Data Source
AI summary
The present invention provides a multi loop antenna module that maximizes antenna performance even in a portable terminal equipped with a metallic rear cover, using an antenna pattern formed in a multi loop shape, and a portable terminal having the multi loop antenna module. The multi loop antenna module may include: an antenna sheet having a radiation pattern with two or more loops on a side; and a magnetic sheet mounted on a rear side of the antenna sheet.