Stacked Balun Structure With Coupling Hole for Broadband Miniaturization
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Solution Overview
Problem
Existing balun structures are large in size and face challenges in meeting miniaturization requirements.
Innovation Solution
A balun structure comprising a first and second dielectric layer, a ground electrode with a coupling hole, and unbalance and balance electrodes, where the electrodes are partially overlapped with the coupling hole, allowing for compact design and balanced-unbalanced signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional transformer balun or hybrid coupler balun structures are used, then signal conversion function is achieved, but the device size becomes large
Solution Approach 1:
The patent transitions from planar electrode arrangements to a three-dimensional stacked configuration with dielectric layers. The first and second electrodes are positioned on opposite sides of a dielectric layer, creating vertical separation that reduces horizontal footprint while maintaining electrical functionality for signal conversion.
Solution Approach 2:
The patent embeds the dielectric layer between the first and second electrodes, creating a nested structure where the dielectric is contained within the electrode assembly. This nesting approach compactly integrates multiple functional elements (electrodes for signal conversion and dielectric for insulation and field control) into a single compact unit.
2Volume of moving object
If miniaturized balun structure is implemented, then device size is reduced, but signal transmission bandwidth may be compromised
Solution Approach 1:
The patent introduces a ground electrode with a coupling hole at a specific location between the first and second electrodes. This localized structural feature creates a controlled coupling region that manages electromagnetic field distribution, enabling broadband signal transmission while maintaining the overall compact size of the balun structure.
Solution Approach 2:
The ground electrode is segmented by introducing a coupling hole, which divides the ground structure into distinct regions. This segmentation controls the electromagnetic coupling between electrodes, allowing optimization of signal transmission characteristics across different frequency bands while keeping the device miniaturized.
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 structure achieves miniaturization while ensuring signal transmission bandwidth and broadband characteristics, suitable for planar microwave devices and differential signal conversion.
Implementation Method 1
the ground electrode has a coupling hole therein, the coupling hole extending from a surface facing the first dielectric layer to a surface facing the second dielectric layer
Data Source
AI summary
Provided is a balun structure, including: a first dielectric layer, a second dielectric layer, a ground electrode, an unbalance electrode, and a balance electrode. The first dielectric layer, the ground electrode, the second dielectric layer are successively stacked, and the ground electrode has a coupling hole therein. The coupling hole extends from a surface facing the first dielectric layer to a surface facing the second dielectric layer. The unbalance electrode is disposed on a first side of the first dielectric layer, wherein the first side of the first dielectric layer is a side, distal from the ground electrode, of the first dielectric layer. The balance electrode is disposed on a first side of the second dielectric layer, wherein the first side of the second dielectric layer is a side, distal from the ground electrode, of the second dielectric layer.