NFC Antenna Eliminating Dead Zones via Nested Loops
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing NFC readers face a technical challenge where a larger loop antenna area than the NFC tag's area leads to a non-communication zone within the reader, preventing successful near field communication.
Innovation Solution
The implementation of a first loop antenna with multiple non-overlapping closed loops inside it, which are magnetically coupled, allowing for even magnetic field distribution and extending the NFC communication area by ensuring no non-communication zones exist within the reader.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the area of the loop antenna of the reader is increased to extend communication range, then the communication coverage area is improved, but non-communication zones appear inside the loop antenna area
Solution Approach 1:
The patent divides the single large loop antenna into multiple smaller closed loops arranged in an array. Each small loop acts as an independent antenna element, and their combined effect provides uniform magnetic field distribution across the entire antenna area, eliminating non-communication zones while maintaining large coverage area.
2Reliability
If multiple closed loops are added inside the first loop to eliminate non-communication areas, then communication coverage reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a nested structure where multiple small closed loops are positioned inside the boundary of the first large loop antenna. This nested arrangement allows the smaller loops to be integrated within the overall antenna structure, providing enhanced communication reliability without requiring separate external components or complex assembly.
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 ensures successful NFC communication across a wider area, including regions where a standard loop antenna would fail, by evenly distributing the magnetic field and maintaining communication even when the reader's antenna area is significantly larger than the tag's.
Implementation Method 1
NFC is performed between the reader and the tag using a magnetic coupling between a loop antenna formed on the reader and a loop antenna formed on the tag
Data Source
AI summary
A near field communication (NFC) antenna includes a first loop for receiving an electrical signal from the outside and a plurality of closed loops disposed in an inner area of the first loop. The plurality of closed loops do not overlap each other.