Antenna Coil Cross-Shaped Diagonal Winding for Sensitivity
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Solution Overview
Problem
Conventional antenna coils face a challenge in increasing sensitivity by extending core length or number of turns without enlarging the coil size, which limits their performance in receiving electric waves in multiple axial directions.
Innovation Solution
The design incorporates a cross-shaped coil structure with orthogonal first and second coil portions and a circling coil, where the coil portions are wound to maximize core volume and sensitivity by aligning with diagonal directions of the coil receiving portion, and the circling coil is wound to surround the cross-shaped coil, enhancing sensitivity in multiple axes without increasing the coil's physical size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If core length, number of turns of wound coil, or coil length is increased to increase sensitivity, then sensitivity is improved, but antenna coil size is enlarged
Solution Approach 1:
The patent applies nesting by placing the first and second coil portions inside the circling coil, creating a nested structure where smaller coils are positioned within the larger circling coil. This allows the coil portions to utilize the space within the circling coil's enclosure, effectively increasing the core length and number of turns without proportionally increasing the overall antenna coil volume. The nested arrangement enables high sensitivity while maintaining compact size.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by positioning the first coil portion and second coil portion at different locations within the circling coil, and orienting them in different directions. This dimensional optimization allows the coil portions to extend in multiple directions simultaneously, effectively increasing the functional core length and sensitivity without linearly increasing the overall antenna coil dimensions.
2Measurement precision
If core volume is increased by increasing core length to increase sensitivity, then sensitivity is improved, but antenna coil size is enlarged
Solution Approach 1:
The first and second coil portions are nested within the circling coil structure, allowing the core volume to be efficiently utilized in three-dimensional space. The nesting enables the coil portions to achieve increased effective core volume without proportionally increasing the overall antenna coil envelope volume, thus improving sensitivity while maintaining compact dimensions.
Solution Approach 2:
The patent employs dynamic spatial utilization by strategically positioning the coil portions at optimal locations within the circling coil and orienting them to maximize magnetic flux linkage. This dynamic arrangement optimizes the core volume utilization, enabling high sensitivity with minimized physical volume.
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 allows for higher sensitivity and longer coil lengths, enabling effective reception of electric waves in three axial directions while maintaining a compact antenna coil size, thereby improving the performance of remote keyless entry systems.
Implementation Method 1
an antenna coil capable of receiving electric waves in three axial directions
Data Source
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AI summary
The present invention provides an antenna coil capable of attaining high sensitivity by increasing a core length, the number of turns of wound coil or a coil length without increasing the antenna coil size. An antenna coil 10 includes: a first coil portion 211 wound with coil wire 21A; a second coil portion 212 wound with coil wire 21A and intersecting with the first coil portion 211; and a case 30 having a coil receiving portion 34 receiving the first coil portion 211 and the second coil portion 212, in which the first coil portion 211 and the second coil portion 212 are disposed so that extending directions of the respective coil portions 211, 212 are directed in diagonals direction of the coil receiving portion 34.