Coil Component Structure for High-Frequency Impedance Peaks
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Solution Overview
Problem
Existing coil components face challenges in maintaining impedance peaks in high frequency bands while preventing a decrease in inductance.
Innovation Solution
The coil component design includes an element body with a pair of end surfaces and a coil disposed within, featuring a second element body portion with distinct regions having different relative permeability and permittivity values. This configuration ensures an impedance peak in high frequency bands and maintains inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform element body structure is used, then manufacturing is simple, but impedance peak in high frequency band cannot be achieved
Solution Approach 1:
The element body is divided into multiple regions with different relative permeability and relative permittivity values. Specifically, a first region with higher relative permeability and a second region with lower relative permeability are disposed at different positions in the element body. This local differentiation of material properties creates the impedance peak in the high frequency band while maintaining a relatively simple overall structure.
2Reliability
If high relative permeability material is used throughout, then inductance is maintained, but impedance peak in high frequency band cannot be achieved
Solution Approach 1:
Different regions of the element body are assigned different material properties. The first region uses material with higher relative permeability to maintain inductance, while the second region uses material with lower relative permeability and lower relative permittivity to create the impedance peak in the high frequency band. This localized material differentiation resolves the contradiction between maintaining inductance and achieving impedance peak.
3Reliability
If element body portions are differentiated into multiple regions, then impedance peak is achieved, but manufacturing complexity increases
Solution Approach 1:
The element body is segmented into multiple regions with distinct electromagnetic properties. By dividing the element body into a first region and a second region with different material characteristics, the patent achieves the impedance peak in the high frequency band. The segmentation is designed to be compatible with conventional manufacturing processes, balancing performance requirements with ease of manufacture.
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
The proposed design effectively achieves an impedance peak in high frequency bands while preventing a decrease in inductance, enhancing the coil component's performance.
Implementation Method 1
the second element body portion is reliably disposed at a position through which a magnetic flux generated by the coil conductor passes
Implementation Method 2
The second region has relative permeability smaller than relative permeability of the first region
Implementation Method 3
relative permittivity smaller than relative permittivity of the first region
Data Source
AI summary
A coil component includes an element body including a pair of end surfaces opposing each other, and a coil disposed in the element body. The coil includes at least one coil conductor. The element body includes a pair of first element body portions each including a corresponding end surface of the pair of end surfaces, and a second element body portion between the pair of first element body portions. The second element body portion includes a first region and a second region disposed at positions different from each other in the direction. The second region has relative permeability smaller than relative permeability of the first region and relative permittivity smaller than relative permittivity of the first region. The at least one coil conductor includes a coil conductor disposed in the second element body portion.