Multilayer Inductor Stack With Unequal Parallel Windings
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Solution Overview
Problem
The challenge of maintaining desired characteristics in multilayer electronic components with two inductors is exacerbated by the need for miniaturization, which reduces space for inductors, making it difficult to increase the Q value of the inductor.
Innovation Solution
A multilayer electronic component design with first and second inductors connected in parallel, where each inductor is wound about an axis orthogonal to the stacking direction of dielectric layers, with differing numbers of windings, integrated within a stack of dielectric layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two inductors are simply connected in parallel to increase Q value, then the Q value of the inductor increases, but the combined inductance decreases causing desired characteristics to not be achieved
Solution Approach 1:
The inductor is segmented into multiple windings with different numbers of turns (first winding: 3-7 turns, second winding: 1-2 turns) connected in parallel. This segmentation allows each winding to contribute differently to the overall inductance and Q value, resolving the contradiction by maintaining desired inductance while achieving high Q value through the parallel configuration of unequal windings.
Solution Approach 2:
Different portions of the inductor structure have different qualities - the first winding has more turns for higher inductance contribution while the second winding has fewer turns optimized for Q value enhancement. This local differentiation in winding characteristics allows the parallel connection to achieve both desired inductance and high Q value simultaneously.
2Volume of moving object
If branching filters are downsized to reduce apparatus footprint, then the size of the filter decreases, but the space for arranging inductors is reduced making it difficult to increase Q value
Solution Approach 1:
The inductor windings are arranged in different spatial dimensions and orientations within the compact filter structure. The first and second windings are positioned at different locations and angles, allowing efficient use of three-dimensional space. This dimensional arrangement enables high Q value achievement without increasing the overall filter footprint.
Solution Approach 2:
The multiple windings are nested within each other and integrated into the compact filter structure. The first winding with more turns is positioned to utilize available space efficiently, while the second winding with fewer turns is arranged in a nested or adjacent configuration, maximizing space utilization while maintaining high Q value in the miniaturized filter.
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 achieving desired characteristics while increasing the Q value of the inductors, enhancing performance in compact mobile communication devices.
Implementation Method 1
Each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of the plurality of dielectric layers
Data Source
AI summary
An electronic component includes: a first inductor; a second inductor connected in parallel with the first inductor; and a stack for integrating the first inductor and the second inductor, the stack including a plurality of dielectric layers stacked together. Each of the first inductor and the second inductor is wound about an axis extending in a direction orthogonal to a stacking direction of the plurality of dielectric layers. The number of windings of the first inductor and the number of windings of the second inductor are different from each other.