Multilayer Balun Filter Layout for Smaller Planar Footprint
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Solution Overview
Problem
Existing multilayer electronic components integrating filters and baluns are not adequately downsized to meet the demands of compact mobile communication devices with high functionality and mounting density.
Innovation Solution
The multilayer electronic component is designed with inductors and capacitors arranged in a parallel direction to the stacking direction of dielectric layers, integrating an unbalanced terminal, balanced terminals, and phase-shift circuits, utilizing a stack of dielectric layers and conductors to minimize physical space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If inductors and capacitors are arranged in conventional directions (perpendicular to stacking direction) in multilayer electronic components, then ease of manufacture and conventional layout are maintained, but the planar size of the component increases, reducing mounting density
Solution Approach 1:
The patent applies dimensionality change by arranging inductors in a direction parallel to the stacking direction of dielectric layers, rather than in the conventional planar arrangement perpendicular to stacking. This utilizes the vertical dimension within the multilayer structure to reduce the planar footprint of the component while maintaining electrical functionality, thereby achieving downsizing without fundamentally altering manufacturing processes
2Volume of moving object
If the planar size of the electronic component is reduced by changing inductor arrangement direction, then mounting density increases, but frequency characteristics and balance performance may deteriorate
Solution Approach 1:
The patent applies parameter changes by carefully designing the geometric parameters of inductors (such as winding patterns, trace widths, and spacing) and their positional relationships within the parallel-to-stacking arrangement. These parameter optimizations ensure that the altered inductor configuration maintains satisfactory frequency characteristics and balance performance while achieving the desired planar size reduction
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 configuration allows for a significant reduction in the component's planar size while maintaining satisfactory frequency characteristics and balance performance, enhancing mounting density without deteriorating electrical properties.
Implementation Method 1
a first phase-shift circuit including a first inductor provided in a first path connecting the unbalanced terminal and the first balanced terminal
Implementation Method 2
a first capacitor provided between the first path and a ground in a circuit configuration, a second phase-shift circuit including a second capacitor provided in a second path connecting the unbalanced terminal and the second balanced terminal
Data Source
AI summary
An electronic component includes a filter, a first phase-shift circuit, a second phase-shift circuit, and a stack. The first phase-shift circuit includes a first inductor provided in a first path connecting an unbalanced terminal and a first balanced terminal, and a first capacitor provided between the first path and a ground in a circuit configuration. The second phase-shift circuit includes a second capacitor provided in a second path connecting the unbalanced terminal and a second balanced terminal, and a second inductor provided between the second path and the ground in the circuit configuration. The first inductor and the second inductor are arranged in a direction parallel to a stacking direction.