Antenna Coil Layout for Wider Wireless Power Range
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Solution Overview
Problem
Existing antenna modules face challenges in extending communicable range while minimizing the number of turns, as increasing the number of turns leads to increased DC resistance and impedance changes.
Innovation Solution
The antenna module incorporates a first coil pattern with specific turn configurations, including first, second, and third turns positioned in a manner that optimizes opening widths and distances, allowing for a wide communicable range with fewer turns, and includes additional turns and design modifications to enhance communication characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the number of turns is increased to extend communicable range, then the communicable range is extended, but the DC resistance increases causing impedance change
Solution Approach 1:
The patent applies local quality by creating non-uniform spacing between turns, where the first and second turns have smaller spacing than the second and third turns. This localized variation in geometry optimizes the magnetic field distribution in different regions, allowing extended communicable range without proportionally increasing the total number of turns and thus limiting DC resistance increase
Solution Approach 2:
The patent employs asymmetry by making the opening widths of turns differ in different directions (first direction vs. second direction) and by creating asymmetric spacing patterns between adjacent turns. This asymmetric geometry allows the antenna to achieve directional optimization for extended range while controlling overall turn count and resistance
2Length of stationary object
If the number of turns is increased to extend communicable range, then the communicable range is extended, but the impedance changes
Solution Approach 1:
By implementing local quality through varied turn spacing and opening widths, the patent optimizes the magnetic field distribution locally in different regions. This allows the antenna to achieve extended range through geometric optimization rather than simply adding more turns, thereby maintaining more stable impedance characteristics
Solution Approach 2:
The patent applies parameter changes by systematically varying the spacing between turns and the opening widths in different directions. These geometric parameter variations allow optimization of both range and impedance stability without relying on increased turn count, thus avoiding the impedance instability that would result from simply adding more turns
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 effectively extends the communicable range in desired directions while maintaining low impedance, ensuring reliable communication and power transmission even when the smartphone is offset on the placement surface.
Implementation Method 1
a first coil pattern including at least first, second, and third turns... extends a communicable range... ensuring reliable communication and power transmission
Data Source
AI summary
Disclosed herein is an antenna module sheet that includes a first coil pattern including first to third turns. The first turn is positioned in an opening of the second turn, and the second turn is positioned in an opening of the third turn. Each of the first and second turns has an opening width larger in a first direction than in a second direction. The first distance between the first and second turns in the second direction is smaller than the second distance between the second and third turns in the second direction. The third distance between the first and second turns in the first direction is smaller than the first distance. The fourth distance between the second and third turns in the first direction is smaller than the second distance. The third turn has an opening width larger in the second direction than in the first direction.