Multilayer Band Pass Filter With Adjustable Jump Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multilayer band pass filters with three or more stages of LC parallel resonators have limited degree of freedom in adjusting electromagnetic coupling and attenuation characteristics due to parallel alignment of loop surfaces, restricting the flexibility in setting attenuation poles and passband.
Innovation Solution
A multilayer band pass filter design where pairs of LC parallel resonators are arranged in a direction parallel to each other, allowing for adjustable jump magnetic and capacitive coupling between non-adjacent resonators, with specific configurations enabling easy adjustment of coupling strength between adjacent pairs by varying distances and electrode orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If loop-shaped inductors are arranged in parallel alignment to achieve compact structure, then device complexity is reduced, but the degree of freedom in adjusting electromagnetic coupling and attenuation characteristics is limited
Solution Approach 1:
The patent transitions from a single-plane parallel arrangement to a three-dimensional stacked configuration where loop-shaped inductors are arranged in multiple layers vertically. This dimensional change allows for additional coupling paths (both adjacent and jump coupling between non-adjacent resonators) while maintaining compact footprint, thereby increasing the degree of freedom in adjusting electromagnetic coupling and attenuation characteristics without sacrificing structural compactness.
2Reliability
If three or more stages of LC parallel resonators are provided to improve filter performance, then attenuation characteristics are enhanced, but the flexibility in setting attenuation poles is restricted due to limited coupling adjustment
Solution Approach 1:
The patent segments the resonator arrangement into multiple independent stages that can be individually configured. Each stage's loop-shaped inductors can be independently positioned and coupled, allowing separate optimization of coupling strength for each stage. This segmentation enables flexible adjustment of attenuation poles by independently tuning the coupling between adjacent and non-adjacent resonators across multiple stages, thereby enhancing both attenuation characteristics and design flexibility.
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 the degree of freedom in designing attenuation characteristics and increases the strength of coupling between resonators, thereby improving the filter's passband width and flexibility in setting attenuation poles.
Implementation Method 1
a capacitor electrode 412, a ground electrode 409, via-electrodes 433 and 434, and a strip electrode 617 define a second-stage LC parallel resonator
Implementation Method 2
providing loop-shaped inductors produces an effect that the Q characteristics of the LC parallel resonators are improved and that the attenuation characteristics of the filter are improved
Implementation Method 3
the plurality of electrode layers defining a first capacitor electrode, a second capacitor electrode which faces the first capacitor electrode, and a loop-shaped inductor electrode
Data Source
AI summary
In a multilayer band pass filter, via-electrodes and strip electrodes define inductors of LC parallel resonators in four stages. A capacitor electrode and a ground electrode define a capacitor of a first-stage LC parallel resonator. A capacitor electrode and the ground electrode define a capacitor of a fourth-stage LC parallel resonator. Capacitor electrodes define a second-stage LC parallel resonator. Capacitor electrodes define a third-stage LC parallel resonator. Among four or more of the LC parallel resonators, the coupling between certain LC parallel resonators is easily defined, and the attenuation characteristic of a filter is definable with a high degree of freedom.