Resonator Via Segmentation in Low-Height Dielectric Filters
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Solution Overview
Problem
There is a demand for filters that are lower in height, but simply reducing the height of filters leads to a deterioration in filter characteristics.
Innovation Solution
A filter design that includes a dielectric substrate with multiple shielding conductors and resonators, where the first resonator is positioned at the center and has a divided via electrode portion, while other resonators have undivided via electrode portions, allowing for a reduction in height without compromising filter characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the height of the filter is simply reduced, then the height parameter is improved, but the filter characteristics deteriorate
Solution Approach 1:
The via electrode portion of the first resonator is divided into multiple via electrodes arranged in the vertical direction. This segmentation allows the resonator to maintain its electrical characteristics while reducing the overall filter height, as the divided via electrodes can be positioned more compactly without compromising the resonant behavior or coupling efficiency of the filter.
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 proposed filter achieves a reduction in height while maintaining satisfactory filter characteristics, effectively addressing the challenge of height reduction without deteriorating performance.
Implementation Method 1
a capacitor electrode that faces toward the first shielding conductor and is connected to one end of the via electrode portion
Implementation Method 2
a plurality of resonators each including a via electrode portion that is formed inside the dielectric substrate and constituted by a plurality of via electrodes, and a capacitor electrode that faces toward the first shielding conductor
Data Source
AI summary
This filter comprises a plurality of resonators, each of which comprises a via electrode section and /a capacitor electrode. A first via electrode section, which is provided to a first resonator located in the center of a dielectric substrate, is divided into a first partial electrode section and a second partial electrode section, and each of the plurality of resonators other than the first resonator is provided with one undivided via electrode section.