NFC Antenna Module With Overlapping Radiation Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional NFC antenna modules in portable terminals suffer from weak signal reception and reduced recognition distance due to their differential antenna design, which limits the effectiveness of short-range communication.
Innovation Solution
The NFC antenna module incorporates two antenna sheets with partially overlapping radiation patterns and an electromagnetic shielding sheet, along with a radiation sheet that acts as an auxiliary radiator, to enhance antenna performance by increasing the radiation area and coupling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a differential antenna type-NFC antenna module is used, then the device complexity is reduced, but the signal reception strength deteriorates and recognition distance is shortened
Solution Approach 1:
The antenna module is segmented into multiple antenna sheets (first antenna sheet with first radiation pattern, second antenna sheet with second radiation pattern) that are stacked and positioned to partially overlap. Each radiation pattern contributes to the overall signal reception, with the overlapping region providing enhanced reception strength through combined radiation effects.
Solution Approach 2:
The patent transitions from a planar differential antenna design to a three-dimensional stacked configuration with multiple antenna sheets at different positions. The radiation patterns are arranged in overlapping spatial relationships (front-rear, left-right, upper-lower patterns) that utilize vertical and horizontal dimensions to enhance signal reception without increasing device complexity.
2Ease of manufacture
If a differential antenna type-NFC antenna module is used, then the manufacturing process is simplified, but the recognition distance is shortened
Solution Approach 1:
The antenna system is divided into multiple independent radiation patterns on separate antenna sheets, each contributing to the overall recognition distance. The segmented approach allows each pattern to be manufactured using standard processes while the combined effect extends the recognition distance beyond what a single differential antenna could achieve.
Solution Approach 2:
Multiple radiation patterns from different antenna sheets are merged in the overlapping region to create enhanced signal strength and extended recognition distance. The combining of front-rear patterns, left-right patterns, and upper-lower patterns creates a composite radiation field that reaches farther than individual patterns alone.
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 antenna performance by extending the radiation area and improving signal reception, thereby enhancing the recognition distance and overall communication effectiveness in NFC applications.
Implementation Method 1
an electromagnetic shielding sheet stacked on both the first antenna sheet and the second antenna sheet
Implementation Method 2
a first radiation pattern formed along a peripheral surface of a first central part; a second radiation pattern formed along a peripheral surface of a second central part, the second radiation pattern being formed to partially overlap the first radiation pattern
Data Source
AI summary
Disclosed are a NFC antenna module which maximizes antenna performance by mounting a radiation sheet in such a manner as to overlap a part of an antenna sheet and a portable terminal comprising the same. The disclosed NFC antenna module comprises: a first antenna sheet having a first radiation pattern formed along the outer periphery of a first central portion; a second antenna sheet having a second radiation pattern formed along the outer periphery of a second central portion in such a manner as to partially overlap with the first radiation pattern; and an electromagnetic wave shielding sheet laminated on the first antenna sheet and the second antenna sheet.