Multilayer Resonator Layout for Compact Band-Pass Filters
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Solution Overview
Problem
Existing band-pass filters in small-sized communication apparatuses face challenges in miniaturization without compromising desired characteristics, as reducing the size of resonators leads to reduced Q value and inductance, affecting performance.
Innovation Solution
A multilayered filter device with resonators arranged such that their openings face each other, incorporating a first and second portion parallel to the axis, and integrated with a stack of dielectric layers, allowing for miniaturization while maintaining desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of resonator is reduced for miniaturization, then the device size is reduced, but the Q value and inductance are reduced
Solution Approach 1:
The resonators are arranged in a planar configuration where their openings face each other, utilizing two-dimensional spatial arrangement to achieve compact size while maintaining electrical performance through optimized geometric positioning rather than vertical stacking
Solution Approach 2:
Adjacent resonators are positioned with their openings facing each other, creating electromagnetic coupling between them. This merging of electromagnetic fields allows the resonators to maintain desired Q values and inductance characteristics while being compact in size
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
The solution enables miniaturization of the filter device while preserving the desired performance characteristics, addressing the limitations of conventional designs.
Implementation Method 1
Each of the first resonator and the second resonator includes a first portion and a second portion arranged with a certain distance in a direction parallel to the axis. The second portion of the first resonator and the first portion of the second resonator are adjacent to each other.
Data Source
AI summary
Each of a plurality of resonators of a filter device is wound around an axis orthogonal to a stacking direction of a plurality of dielectric layers of a stack and is arranged in a manner that an opening of each of the resonators faces one or more openings of one or two other resonators. The plurality of resonators include a first resonator and a second resonator adjacent to each other in a circuit configuration. Each of the first resonator and the second resonator includes a first portion and a second portion arranged with a certain distance in a direction parallel to the axis. The second portion of the first resonator and the first portion of the second resonator are adjacent to each other.