High Frequency Inductor With Parallel Coil Patterns For Precision Inductance
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Solution Overview
Problem
High frequency inductors used in smartphones require a small size, high capacity, and high Q characteristics to reduce loss at frequencies above 100 MHz, but existing designs struggle to finely adjust inductance values while maintaining optimal coil shapes and minimizing resistance.
Innovation Solution
The inductor design features a body with multiple insulating layers and coil patterns connected in parallel, where internal coil patterns have different shapes and line widths, allowing for adjustable inductance and improved Q characteristics by optimizing the coil structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If coil patterns are connected in parallel with identical shapes, then manufacturing simplicity is maintained, but inductance value adjustment precision is insufficient
Solution Approach 1:
The patent applies local quality by making only the internal side portions of coil patterns have different shapes while keeping other portions identical. This allows precise inductance adjustment through localized geometric variations without requiring complete redesign of entire coil structures, thus achieving manufacturing precision improvement with limited complexity increase.
Solution Approach 2:
The coil patterns are segmented into different portions (internal side portions vs. other portions), where only specific segments need to be varied for inductance adjustment. This segmentation approach enables fine-tuning of inductance values by modifying only necessary parts while maintaining simplicity in other areas.
2Adaptability or versatility
If coil patterns are optimized for high Q characteristics, then loss reduction is achieved, but inductance value flexibility is reduced
Solution Approach 1:
The patent uses parameter changes by varying the shapes of internal side portions of coil patterns to achieve different inductance values. This allows continuous adjustment of inductance parameters while maintaining the overall coil structure optimized for high Q characteristics, thus providing both flexibility and stability.
Data Source
AI summary
An inductor includes a body including a plurality of insulating layers and a plurality of coil patterns are disposed on each of the plurality of insulating layers, and first and second external electrodes disposed on an external surface of the body. The plurality of coil patterns are connected to each other by coil connecting portions and both end portions thereof are electrically connected to the first and second external electrodes through coil lead portions, respectively, to form a coil. The plurality of coil patterns include coil patterns disposed on an outer portion of the body and coil patterns disposed on an inner portion of the body, the coil patterns disposed on the inner portion of the body include first coil patterns electrically connected in parallel, and at least one of the first coil patterns includes an internal side portion having a shape different from shapes of remaining coil patterns.