Multilayer LC Resonator Layout for Compact Magnetic Coupling
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Solution Overview
Problem
Existing electronic components, such as band pass filters, face challenges in reducing the size of LC parallel resonators, leading to increased length in the direction perpendicular to the resonators, which hinders miniaturization.
Innovation Solution
The design incorporates a multilayer body with insulating layers and conductive layers arranged in a helical configuration, allowing adjacent resonators to be magnetically coupled while reducing the size by eliminating the need for extensive linear inductor configurations, and includes LC parallel resonators connected to outer electrodes with capacitors positioned to enhance frequency alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inductors are aligned linearly in a second direction perpendicular to their extension direction, then magnetic coupling between resonators is achieved, but the length of the electronic component in the second direction is increased
Solution Approach 1:
The patent transitions from a planar linear arrangement to a three-dimensional stacked configuration. Inductors are arranged in multiple layers (first through fourth inductor layers) stacked in the thickness direction, with via holes providing vertical connections. This spatial reorganization maintains magnetic coupling between adjacent resonators while significantly reducing the horizontal length of the component.
Solution Approach 2:
The patent embeds multiple inductor structures within each other in the vertical dimension. Each inductor layer is positioned above or below adjacent layers, with via holes nesting through the substrate to connect corresponding terminals across layers. This nested arrangement consolidates what would otherwise require extended linear spacing into a compact vertical stack.
2Length of moving object
If LC parallel resonators are miniaturized, then the size of the electronic component is reduced, but the cutoff frequency attenuation characteristics deteriorate
Solution Approach 1:
The patent employs asymmetric inductor geometries within each LC parallel resonator. Inductors feature unequal arm lengths (e.g., first arm longer than second arm) and non-uniform winding patterns. This asymmetry creates specific magnetic field distributions that enhance the resonators' ability to attenuate signals at cutoff frequencies, allowing miniaturization without sacrificing filtering performance.
Solution Approach 2:
The patent uses multiple identical or similar LC parallel resonator structures (first through fourth resonators) with consistent design parameters. By replicating proven resonator designs in a compact stacked arrangement, the component achieves both size reduction and maintained attenuation characteristics through the collective effect of multiple resonators operating in parallel.
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 significantly reduces the size of the electronic component while maintaining effective frequency filtering characteristics, particularly by sharpening the cutoff frequency edge on the high-frequency side of the pass band.
Implementation Method 1
resonators adjacent to each other in the first direction are magnetically coupled with each other
Data Source
AI summary
An electronic component includes first through n-th inductors that turn around as viewed from a first direction perpendicular or substantially perpendicular to a stacking direction of a multilayer body of the electronic component. An (n+1)-th inductor includes a linear (n+1)-th inductor conductive layer which is provided in a configuration in which it turns around, as viewed from the stacking direction, and which is located within a region surrounded by the first inductor, as viewed from the first direction. An (n+1)-th capacitor is electrically connected to a first outer electrode, and includes an (n+1)-th capacitor conductive layer which opposes a first inductor conductive layer defining the first inductor with an insulating layer of a plurality of insulating layers of the multilayer body interposed therebetween.