Directional Coupler Layout for Simultaneous RF Detection Signals
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Solution Overview
Problem
Existing directional couplers are unable to simultaneously output multiple detection signals.
Innovation Solution
A directional coupler design incorporating a first and second main line, first and second sub-lines, and first and second output terminals, along with first and second inductors, enabling simultaneous output of multiple detection signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional directional coupler with a single sub-line and single output terminal is used, then the structure is simple, but only one detection signal can be output at a time
Solution Approach 1:
The directional coupler is segmented into multiple independent signal paths, each consisting of a sub-line and output terminal combination. The first sub-line and first output terminal form one detection path, while the second sub-line and second output terminal form another detection path. This segmentation allows multiple detection signals to be output simultaneously without requiring a single complex multi-functional terminal.
Solution Approach 2:
The directional coupler structure is designed to perform multiple functions simultaneously - it can detect signals from multiple main lines (first main line and second main line) through different sub-lines and output them through multiple output terminals. This multi-functionality enables the device to handle multiple detection tasks in parallel, improving versatility while maintaining a relatively simple overall structure.
2Adaptability or versatility
If multiple sub-lines and output terminals are added to enable simultaneous output of multiple detection signals, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The inductors are extracted as separate, dedicated components for each signal path rather than being integrated into the output terminals or sub-lines. The first inductor is specifically placed in the first signal path including the first output terminal, and the second inductor is placed in the second signal path including the second output terminal. This extraction simplifies the overall design by making each component's function explicit and independent.
Solution Approach 2:
Each signal path is given its own specific components with optimized characteristics for that particular path. The first sub-line has specific electromagnetic coupling characteristics for the first main line, the second sub-line has characteristics for the second main line, and each inductor is optimized for its respective signal path. This local optimization allows each part to perform its function efficiently without requiring overall system complexity.
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
Enables the simultaneous output of multiple detection signals, supporting advanced communication technologies like 4G and 5G standards, carrier aggregation, and dual connectivity in communication devices.
Implementation Method 1
The sub-line is configured to be electromagnetically coupled to the main line
Data Source
AI summary
A directional coupler includes a first main line, a second main line, first sub-lines, second sub-lines, a first output terminal, a second output terminal, a first inductor, and a second inductor. The first output terminal is configured to be coupled to the first sub-lines. The first output terminal is configured to output a first detection signal corresponding to a first radio-frequency signal transferred through the first main line. The second output terminal is configured to be coupled to the second sub-lines. The second output terminal is configured to output a second detection signal corresponding to a second radio-frequency signal transferred through the second main line. The first inductor is provided in a first signal path including the first output terminal. The second inductor is provided in a second signal path including the second output terminal.