Variable Thickness Magnetic Shielding for Combo Antenna Modules
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Solution Overview
Problem
Conventional combo type antenna modules experience reduced performance of certain antennas, such as NFC and A4WP, due to the use of a uniform shielding material thickness regardless of antenna type, leading to suboptimal performance in a limited space.
Innovation Solution
The combo type antenna module employs magnetic sheets of varying thicknesses and materials, with different thicknesses for regions corresponding to different antenna patterns, allowing for optimized performance by laminating thicker sheets over A4WP and NFC antennas and thinner sheets over WPC and MST antennas, while maintaining minimal module thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform shielding sheet of the same thickness is laminated on all antenna patterns, then the manufacturing process is simple, but the performance of certain antennas (NFC, A4WP) is lowered
Solution Approach 1:
The patent applies different thicknesses of magnetic sheets to different antenna patterns based on their specific performance requirements. Thinner magnetic sheets (first thickness) are used for WPC and MST antennas, while thicker magnetic sheets (second thickness greater than first) are used for NFC and A4WP antennas. This local differentiation optimizes each antenna's performance while maintaining a unified manufacturing process.
2Reliability
If the magnetic sheet thickness is increased to improve NFC and A4WP antenna performance, then the communication performance is maximized, but the overall module thickness increases
Solution Approach 1:
Instead of uniformly increasing the magnetic sheet thickness across the entire module, the patent implements local quality by applying thicker magnetic sheets (second thickness) only to specific regions where NFC and A4WP antennas are located, while maintaining thinner magnetic sheets (first thickness) for WPC and MST antenna regions. This approach maximizes the performance of frequency-sensitive antennas without unnecessarily increasing the overall module thickness.
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 maximizes communication performance for all antennas, including magnetic induction type wireless power transmission, magnetic secure transmission, magnetic resonance type wireless power, and near field communication, while minimizing the overall thickness of the antenna module.
Implementation Method 1
The wireless power transmission antenna is used for charging the battery by magnetic induction or magnetic resonance between the antennas
Implementation Method 2
The wireless power transmission antenna is used for charging the battery by magnetic induction or magnetic resonance between the antennas
Data Source
AI summary
The present invention relates to a combo type antenna module capable of maximizing performance of all antennas while minimizing a thickness of the antenna module by laminating a magnetic sheet having different thicknesses according to an antenna pattern formed on a base sheet. The combo type antenna module includes: a first antenna pattern formed on one surface and the other surface of the base sheet; a second antenna pattern formed on one surface of the base sheet; and a magnetic member laminated on the other surface of the base sheet, wherein the magnetic member is formed so that a thickness of a region corresponding to the second antenna pattern is formed thicker than that of a region corresponding to the first antenna pattern.