Multilayer LC Filter With Intersecting Inductor Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multilayer LC filters face challenges in increasing inductance values and Q values while maintaining a reduced profile, as increasing inductor length requires more dielectric layers or thicker layers, leading to increased height and difficulty in achieving desired frequency characteristics and reducing insertion loss.
Innovation Solution
The multilayer LC filter design incorporates intersecting linear conductive patterns within the inductors, allowing for increased inductance values and improved Q values by effectively using the volume inside the multilayer body, with intersecting angles of about 90 degrees to minimize magnetic flux interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inductor length is increased to achieve larger inductance values and higher Q values, then the inductance value and Q value are improved, but the filter profile (height) increases due to requiring more dielectric layers or thicker layers
Solution Approach 1:
The patent transitions from planar linear conductive patterns to three-dimensional intersecting conductive patterns within the multilayer structure. By utilizing vertical stacking and intersection of conductive patterns at approximately 90-degree angles, the inductor achieves increased effective length and inductance value without proportionally increasing the filter's height profile.
Solution Approach 2:
The patent embeds multiple intersecting conductive patterns within the multilayer dielectric structure, nesting the inductor geometry inside the compact multilayer body. This allows the inductor to achieve longer effective path length through internal three-dimensional routing rather than external extension.
2Loss of energy
If the inductor length is increased to reduce insertion loss, then the insertion loss is reduced, but the filter profile (height) increases
Solution Approach 1:
The intersecting three-dimensional conductive patterns enable increased inductor length for reduced insertion loss without increasing filter height. The vertical and lateral intersections create longer current paths within the compact multilayer volume.
3Length of stationary object
If the filter profile is reduced to achieve compactness, then the profile is reduced, but the inductance value decreases and Q value lowers
Solution Approach 1:
The patent maintains compact filter profile by confining the inductor structure within the multilayer body, while achieving adequate inductance value through three-dimensional intersecting conductive patterns that maximize the use of available internal volume.
Solution Approach 2:
The patent optimizes the intersection angle of conductive patterns to approximately 90 degrees, which minimizes magnetic flux interference and maximizes inductance value within the constrained profile dimensions.
4Length of stationary object
If the filter profile is reduced to achieve compactness, then the profile is reduced, but the Q value lowers
Solution Approach 1:
The patent maintains high Q value in the compact structure by optimizing the intersecting conductive pattern geometry, particularly the intersection angle of approximately 90 degrees, which reduces magnetic flux interference and associated losses.
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 achieves a large inductance value and high Q value with reduced insertion loss, enabling the attainment of desired frequency characteristics without increasing the filter's profile, thus addressing the challenge of compactness and performance.
Implementation Method 1
Combinations in which the via conductors and the linear conductive patterns are alternately connected define a plurality of inductors
Implementation Method 2
Capacitances between the capacitor conductive patterns and the ground conductive pattern or capacitances between the capacitor conductive patterns define a plurality of capacitors
Data Source
AI summary
A multilayer LC filter includes a multilayer body in which dielectric layers are laminated, first linear conductive patterns, second linear conductive patterns, third linear conductive patterns, capacitor conductive patterns, ground conductive patterns, and via conductors. When the multilayer body is seen through in the direction in which the dielectric layers are laminated, the first linear conductive patterns and the third linear conductive patterns in a first inductor intersect with each other, and the first linear conductive patterns and the third linear conductive patterns in a second inductor intersect with each other.