Phase Shift Device for Satellite Polarization Adjustment
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Solution Overview
Problem
In satellite communication systems, adjusting the angle of polarization of electromagnetic signals requires bulky and cost-prohibitive physical rotation of antennas or feed assemblies, necessitating a more efficient method for polarization adjustment.
Innovation Solution
A phase shift device with an input quadrature junction and waveguide arms that split and phase-shift electromagnetic signals, allowing for polarization adjustment without large rotation components, utilizing an output quadrature junction to combine the signals into a single output with 180-degree phase separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If physical rotation of antenna or feed assembly is used to adjust polarization angle, then polarization adjustment is achieved, but device size becomes bulky and cost increases
Solution Approach 1:
The patent replaces the mechanical rotation system with an electromagnetic field-based phase shifting system. Instead of physically rotating the antenna or feed assembly, the invention uses quadrature hybrid junctions and waveguide arms to introduce controlled phase shifts between signal components, thereby achieving polarization angle adjustment through electromagnetic manipulation rather than mechanical movement.
Solution Approach 2:
The invention changes the phase parameters of the electromagnetic signal components passing through different waveguide arms. By controlling the phase shift introduced in each arm (typically 0, 90, 180, or 270 degrees), the polarization state of the output signal is controlled, enabling polarization adjustment without changing the physical orientation of the antenna structure.
2Adaptability or versatility
If physical rotation of antenna or feed assembly is used to adjust polarization angle, then polarization adjustment is achieved, but manufacturing cost becomes prohibitive
Solution Approach 1:
The patent replaces the mechanical rotation system with an electromagnetic field-based phase shifting system. Instead of physically rotating the antenna or feed assembly, the invention uses quadrature hybrid junctions and waveguide arms to introduce controlled phase shifts between signal components, thereby achieving polarization angle adjustment through electromagnetic manipulation rather than mechanical movement.
Solution Approach 2:
The feed assembly is segmented into multiple independent waveguide arms (typically four arms) that can be independently phased. Each arm processes a specific quadrature component of the signal, allowing independent phase control. This segmentation enables flexible polarization adjustment through electronic phase shifting rather than requiring complex mechanical rotation mechanisms.
3Weight of stationary object
If waveguide arms with phase shifting are used, then bulky rotation mechanisms are eliminated, but device complexity increases due to multiple waveguide arms and junctions
Solution Approach 1:
The quadrature hybrid junction serves multiple functions: it divides the input signal into quadrature components, distributes them to multiple waveguide arms, and recombines them at the output. This multi-functional component reduces the need for separate devices for each function, thereby reducing overall system complexity despite the presence of multiple waveguide arms.
4Adaptability or versatility
If multiple waveguide arms are used to phase-shift signals, then polarization adjustment is achieved without mechanical rotation, but the number of components increases
Solution Approach 1:
Multiple waveguide arms and quadrature hybrid junctions are merged into a single integrated feed assembly structure. The waveguide arms are arranged in a compact configuration (e.g., cross-shaped or T-shaped arrangement) and interconnected through the hybrid junctions, forming a unified device that achieves polarization control without requiring separate mechanical rotation components for each function.
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 efficient adjustment of electromagnetic signal polarization, reducing the need for bulky rotation mechanisms and lowering costs by using phase-shifting waveguide arms to align signal components, thereby facilitating flexible and cost-effective antenna systems.
Implementation Method 1
At least two of the waveguide arms shift the phase of EM signal conveyed therethrough such that two of the first, second, third, and fourth EM signals are phase shifted with respect to the other two of the first, second, third, and fourth EM signals
Data Source
AI summary
A phase shift device includes an input quadrature junction for receiving an input EM signal and extracting a first electromagnetic (EM) signal, a second EM signal, a third EM signal, and a fourth EM signal from the input EM signal. Four waveguide arms are operatively connected to the input quadrature junction for respectively conveying the first, second, third, and fourth EM signals therethrough. At least two of the waveguide arms shift the phase of EM signal conveyed therethrough such that two of the first, second, third, and fourth EM signals are phase shifted with respect to the other two of the first, second, third, and fourth EM signals. An output quadrature junction is operatively connected to the waveguide arms for combining the first, second, third, and fourth EM signals. Thus, polarization adjustment may be achieved through rotation of the phase shift device.