Planar Magnetic Coupling Coil Layout for Small-Turn HF Circuits
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Solution Overview
Problem
Magnetic coupling between coil conductors with small numbers of turns in high frequency circuits is not adequately addressed in existing magnetic coupling coil components, leading to insufficient coupling efficiency.
Innovation Solution
A magnetic coupling coil component design featuring a base with insulating material, where coil conductors have circling trajectory portions with overlapping and non-overlapping regions, and via conductors connect these regions across layers, optimizing magnetic flux path length and coupling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If coil conductors with small numbers of turns are used in high frequency circuits, then the device complexity is reduced, but the magnetic coupling between coil conductors becomes insufficient
Solution Approach 1:
The patent transitions from traditional three-dimensional wound coils to two-dimensional planar conductor patterns embedded in a magnetic base. The first and second conductor patterns are arranged in different planes (first plane and second plane), creating overlapping regions that enhance magnetic coupling. This dimensional change allows effective coupling with fewer turns, directly resolving the contradiction between reduced complexity and maintained coupling reliability.
2Reliability
If the number of turns in circling portions is increased, then the magnetic coupling between coil conductors is improved, but the device complexity and size increase
Solution Approach 1:
The patent merges the first conductor pattern and second conductor pattern in overlapping regions, creating shared magnetic flux paths. The overlapping portions of the conductor patterns are positioned to maximize magnetic coupling without requiring additional turns. This merging approach enhances coupling efficiency while maintaining a compact structure with minimal turns.
3Reliability
If coil conductors are arranged to face opposite surfaces of the base, then the magnetic coupling is enhanced, but the device height increases
Solution Approach 1:
The patent utilizes the planar dimension by arranging conductor patterns in overlapping regions within the base plane, rather than stacking them vertically. The first conductor pattern extends in a first direction and the second conductor pattern extends in a second direction, creating overlapping areas that enhance coupling without significantly increasing the height of the magnetic base. This approach maintains a compact profile while achieving strong magnetic coupling.
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 design enhances magnetic coupling between coil conductors, reducing the difference in self-inductance values and improving coupling efficiency, particularly in high frequency circuits with small numbers of turns.
Implementation Method 1
a first coil conductor (25) provided in the base (10) to face the upper surface (10a) of the base (10); and a second coil conductor (35) provided in the base (10) to face the lower surface (10b) of the base (10)
Data Source
AI summary
Provided is a magnetic coupling coil component that includes a base containing an insulating material and including a first surface and a second surface facing the first surface, a first coil conductor provided in the base to face the first surface, and a second coil conductor provided in the base to face the second surface. The first coil conductor includes a first conductor pattern including a first circling trajectory portion, and a second conductor pattern that is arranged separately from the first conductor pattern in an axial direction along a coil axis and that includes a second circling trajectory portion. The second coil conductor includes a third conductor pattern including a third circling trajectory portion, and a fourth conductor pattern that is arranged separately from the third conductor pattern in the axial direction and that includes a fourth circling trajectory portion.