Rotatable Phase Shifting Element in Satellite Feed Network
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Solution Overview
Problem
Current satellite communication systems require rotating the entire antenna or feed network to adjust polarization directions, which is cumbersome and inefficient due to the weight of the components and the need to reposition cables.
Innovation Solution
A rotatable phase shifting element is integrated within the cylindrical waveguide of a satellite antenna feed network, allowing for the rotation of polarization directions without rotating the entire antenna or relocating cables, by using a dielectric material and diametrically opposed fins to introduce a controlled phase shift between orthogonal polarized modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire antenna or feed network is rotated to adjust polarization directions, then the polarization directions can be matched to the satellite, but the heavy weight of components and cable repositioning requirements make the operation cumbersome and inefficient
Solution Approach 1:
The invention separates the polarization adjustment function from the entire antenna system by introducing an independent rotatable phase shifting element within the feed network. This element can be rotated independently to adjust polarization directions without moving the heavy antenna structure or feed network, thereby resolving the contradiction between ease of operation and weight of moving object
Solution Approach 2:
The rotatable phase shifting element acts as an intermediary component that enables polarization adjustment through a lightweight mechanism. Instead of moving the entire antenna system, this intermediate element performs the polarization matching function by introducing controlled phase shifts, significantly reducing the weight that needs to be moved during operation
2Productivity
If a rotatable phase shifting element with dielectric material is used within the waveguide, then polarization directions can be adjusted efficiently without moving heavy components, but the device complexity increases due to the additional internal structure
Solution Approach 1:
The invention applies local quality by placing dielectric material specifically in certain regions of the waveguide cross-section rather than uniformly throughout. The phase shifting element uses strategically positioned dielectric sections to achieve the required phase shifts, minimizing the amount of dielectric material needed while maintaining functionality, thus balancing productivity improvement with device complexity
Solution Approach 2:
The rotatable phase shifting element introduces dynamic adjustability to the feed network. By making the phase shifting element rotatable, the system can dynamically change polarization directions without physical reconfiguration of cables or other components. This dynamic mechanism achieves high productivity while containing complexity within a single movable component rather than distributing complexity throughout the entire system
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 solution enables efficient adjustment of polarization directions within the satellite communication system, enhancing bandwidth and reducing the need for physical repositioning of heavy components, thus improving operational efficiency and flexibility.
Implementation Method 1
diametrically opposed fins to introduce a controlled phase shift between orthogonal polarized modes
Implementation Method 2
by using a dielectric material and diametrically opposed fins
Data Source
AI summary
There is disclosed a feed network including a circular common waveguide having an axis and terminating in a common port and a first port for coupling a first linearly polarized mode to the circular common waveguide. A phase shifting element may be disposed within the circular waveguide. The phase shifting element may be adapted to cause a predetermined phase shift between a first signal and a second signal propagating in the common waveguide. The phase shifting element may be rotatable about the axis of the common waveguide.