Broadband Capacitor Structure With Floating Electrodes for Capacitance Tuning
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Solution Overview
Problem
Conventional broadband capacitors face challenges in adjusting capacitance values due to limited area changes in the connection between extension arms and main electrodes, restricting their performance.
Innovation Solution
A broadband capacitor design featuring floating electrodes disposed above, below, and on both sides of a stack body, with internal electrodes alternately stacked and connected to external electrodes, forming additional capacitance through overlapping areas with floating electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the area of the main electrode is increased to increase capacitance, then the capacitance value increases, but the range of area change is limited due to the connection side with extension arm and C type electrodes
Solution Approach 1:
The capacitor structure is divided into multiple independent electrode units, each with main electrodes and C-type electrodes. The capacitance is segmented into primary capacitance (from main electrode overlap) and secondary capacitance (from C-type electrode connections). This segmentation allows independent optimization of each unit and enables capacitance adjustment by changing the number or configuration of units without being constrained by a single large electrode's connection side limitations.
Solution Approach 2:
The patent transitions from a two-dimensional electrode layout to a three-dimensional stacked structure. Multiple electrode units are stacked vertically, with internal electrodes extending in the stacking direction. This dimensional change allows capacitance to be increased by adding more stacked units rather than expanding the planar area of individual electrodes, thereby overcoming the connection side area limitation while maintaining capacitance adjustability.
2Reliability
If multiple electrode units are stacked to increase capacitance, then the broadband characteristic is improved, but the device complexity increases
Solution Approach 1:
Adjacent C-type electrodes from different electrode units are electrically connected to form continuous external electrodes. This merging reduces the total number of separate external connections needed and simplifies the overall structure. The internal electrodes are also configured to extend and connect across stacking boundaries, creating a unified multi-unit structure that achieves broadband characteristics without proportionally increasing complexity.
Solution Approach 2:
The internal electrodes serve multiple functions: they form the primary capacitance through overlap with adjacent internal electrodes, they create secondary capacitance by overlapping with C-type electrodes, and they provide electrical connection pathways between stacked units. This multi-functionality reduces the need for separate components and simplifies the overall structure while maintaining broadband performance.
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
Enhances current loop and parasitic capacitance effects, increasing capacitance area and capacity while maintaining a small size, resulting in consistent frequency performance.
Implementation Method 1
The broadband capacitor has an effect in that it can increase a current loop effect and/or a parasitic capacitance effect
Implementation Method 2
to form primary capacitance through an overlap between the main electrodes and to form secondary capacitance between the C type electrodes and the main electrode
Data Source
AI summary
Disclosed is a broadband capacitor in which floating electrodes are disposed above, below and at both sides of a stack in which a plurality of inner electrodes are stacked. The disclosed broadband capacitor comprises: a dielectric on which the stack having the plurality of inner electrodes stacked therein is disposed; a first outer electrode disposed at a first side surface of the dielectric; a second outer electrode disposed at a second side surface of the dielectric; a first floating electrode disposed above the stack; a second floating electrode disposed below the stack; a third floating electrode disposed at one side of the stack; and a fourth floating electrode disposed at the other side of the stack, opposite to the one side of the stack.