Differential Phase Shifter Assembly Capacitive Coupling VSWR Optimization
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Solution Overview
Problem
Existing differential phase shifter assemblies face challenges in minimizing the standing wave ratio (VSWR) due to limited installation space, which affects signal feeding and decoupling efficiency.
Innovation Solution
An additional capacitive coupling device, such as a disk-shaped coupling device separated by an insulator, is introduced above the pointer head of the feed element to enhance capacitive coupling, allowing for improved signal transmission and reduced VSWR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the phase shifter assembly uses a pointer-shaped feed element with capacitive coupling to striplines, then the downtilt angle can be adjusted, but the installation space in the central area becomes limited and VSWR optimization is difficult
Solution Approach 1:
The feed element is divided into multiple segments: a pointer-shaped feed element for stripline coupling and a separate additional coupling device for VSWR optimization. This segmentation allows each component to perform its specific function independently within the constrained central space, enabling both downtilt adjustment and VSWR optimization without interference.
Solution Approach 2:
The additional coupling device is positioned in the axial direction (along the central axis) rather than radially outward. This utilizes the third dimension (axial space) to provide additional coupling capability without increasing the radial footprint, thereby optimizing VSWR while maintaining limited central installation space.
2Reliability
If the pointer-shaped feed element is capacitively coupled to striplines with a solid dielectric, then phase shifting function is achieved, but the standing wave ratio cannot be sufficiently minimized
Solution Approach 1:
An additional coupling device is introduced as an intermediary element between the feed line and the striplines. This intermediate coupling structure provides an additional path for signal coupling that helps minimize standing waves by improving impedance matching, while the original pointer-shaped feed element maintains its phase shifting function through capacitive coupling with the solid dielectric.
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 significantly improves the standing wave ratio by up to 20% and allows for optimized VSWR settings, even in constrained central installation spaces, enhancing the overall performance of the phase shifter assembly.
Implementation Method 1
The additional coupling device, which is capacitively coupled, is provided in the area of the central and pivot axis offset from the pointer head
Implementation Method 2
at least one insulation, in particular in the form of an insulator foil or insulator film, is provided between the further coupling device and the pointer head
Data Source
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AI summary
An improved differential phase shifter assembly is characterized, among other things, by the following features: - at least one further capacitive coupling device (35) is provided in the area of the central and/or pivot axis (9), and - the at least one further coupling device (35; 35a, 35b) a) is arranged next to the second coupling device (24) such that the second coupling device (24) is positioned between the first coupling device (21) and the at least one further capacitive coupling device (35), and/or b) is arranged adjacent to the first coupling device (21) such that the first coupling device (21) is positioned between the second coupling device (24) and the at least one further capacitive coupling device (35).