LC Parallel Resonant Element High Q Multilayer Design
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Solution Overview
Problem
Existing LC parallel resonant elements with inductors formed by linear conductors have low Q values due to small line width, leading to decreased performance in multilayer bodies.
Innovation Solution
The design incorporates a multilayer body with planar conductors and interlayer conductors arranged to form an inductor with a short line length and wide line width, preventing electric field coupling and enhancing the Q value by using a configuration where the inductor is long perpendicular to the signal transmission direction, and the capacitor is formed by planar conductors facing each other across a base material layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inductor is formed by loop shaped linear conductors in dielectric layers, then the inductor can be integrated in the multilayer body, but the line width is small and the Q value is low
Solution Approach 1:
The inductor is transformed from a planar linear conductor configuration to a three-dimensional configuration that utilizes the stacking direction of the multilayer body. The first planar conductor extends in a direction perpendicular to the stacking direction, while interlayer conductors connect this planar conductor to itself through intermediate layers, creating a 3D structure that increases the effective conductor width without compromising integrability.
Solution Approach 2:
The inductor structure embeds multiple functional elements within the multilayer body structure. The first planar conductor is arranged on one dielectric layer, while interlayer conductors pass through intermediate dielectric layers to connect back to the same planar conductor, creating a nested configuration where the conductor path is embedded within the multilayer structure.
2Reliability
If the line length of the inductor is long to achieve wide line width, then the Q value increases, but the transmission distance between terminals increases
Solution Approach 1:
The inductor geometry is changed from a linear extension in the terminal connection direction to a configuration that extends perpendicular to the terminal connection direction. The first planar conductor extends in a direction perpendicular to the stacking direction (which contains the terminals), allowing the inductor to achieve wide effective width without increasing the distance between terminals.
Solution Approach 2:
The inductor configuration is made asymmetric with respect to the terminal arrangement. Instead of symmetric linear extensions from terminals, the first planar conductor is positioned to extend perpendicular to the stacking direction, creating an asymmetric layout that optimizes the Q value while maintaining compact terminal spacing.
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 increases the Q value of the LC parallel resonant element, leading to improved high-frequency signal transmission characteristics and the ability to create a band elimination filter with steep attenuation and narrow bandwidth.
Implementation Method 1
a first planar or substantially planar conductor having a shape that links a first terminal and a second terminal to each other at a shortest distance
Implementation Method 2
two out of the second planar or substantially planar conductors and a corresponding base material layer sandwiched between the two second planar or substantially planar conductors define and function as a capacitor
Implementation Method 3
LC parallel resonant element including a parallel resonant circuit that includes an inductor and a capacitor
Data Source
AI summary
An LC parallel resonant element includes a first planar or substantially planar conductor on a first base material layer and second and third planar or substantially planar conductors on second and third base material layers. The first and third planar or substantially planar conductors extend over nearly the entire surfaces of the first and third base material layers. The second planar or substantially planar conductor extends over nearly the entire length of the second base material layer in a second direction such that a space from the other end portion of two end portions of a multilayer body in a first direction is provided. The first and third planar or substantially planar conductors are connected to each other by interlayer conductors near the other end portion of the multilayer body. The first and second planar or substantially planar conductor are connected to each other by interlayer conductors near one end portion of the multilayer body.