Waveguide Medium Sheet Segmentation for Signal Isolation
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Solution Overview
Problem
Conventional circular polarized satellite signal receivers have poor signal isolation and transmission efficiency due to the medium sheet inserted to transform them, which reduces signal isolation (Cx-pol) and increases noise factor.
Innovation Solution
A wireless signal transmission device with a wave guide containing a medium sheet comprising two sections: a polypropylene (PP) section with a lower dielectric constant adjacent to the transmission unit and an Acrylonitrile-Butadiene-Styrene (ABS) section with a higher dielectric constant adjacent to the opening end, improving noise factor and signal isolation (Cx-pol).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single medium sheet is inserted into the receiver to transform linear polarized signal receiver into circular polarized signal receiver, then the receiver can receive circular polarized signals, but the signal isolation (Cx-pol) is reduced and noise factor increases
Solution Approach 1:
The medium sheet is divided into two distinct sections: a first section with lower dielectric constant (2.2-2.6) and a second section with higher dielectric constant (3.0-3.5). This segmentation allows each section to perform different functions - the first section reduces noise factor while the second section improves signal isolation, thereby resolving the contradiction between adaptability and reliability
Solution Approach 2:
Different regions of the medium sheet are assigned different dielectric constants to optimize local performance. The first section positioned adjacent to the transmission unit has lower dielectric constant to minimize noise, while the second section positioned at the opening end has higher dielectric constant to maximize signal isolation. This local differentiation resolves the contradiction by optimizing each region for its specific function
2Adaptability or versatility
If a medium sheet is inserted into the receiver to enable circular polarized signal reception, then the receiver can process circular polarized signals, but the noise factor increases
Solution Approach 1:
The medium sheet is segmented into two sections with different dielectric constants. The first section with lower dielectric constant (2.2-2.6) is specifically designed to minimize noise factor impact, while the second section handles signal isolation. This segmentation resolves the contradiction by isolating the noise-sensitive function from the signal transformation function
Solution Approach 2:
The region adjacent to the transmission unit (first section) is assigned lower dielectric constant to minimize noise generation and interference. This local optimization resolves the contradiction between enabling circular polarized reception and minimizing noise factor by creating a low-noise zone near the sensitive transmission unit
3Adaptability or versatility
If a conventional medium sheet is used to transform linear polarized receiver into circular polarized receiver, then circular polarized signal reception is enabled, but the signal transmission efficiency is poor
Solution Approach 1:
The medium sheet is divided into two sections with different dielectric constants to optimize different aspects of signal transmission. The first section with lower dielectric constant reduces noise and interference, while the second section with higher dielectric constant enhances signal isolation. Together, they improve overall signal transmission efficiency while maintaining circular polarized reception capability
Solution Approach 2:
The medium sheet functions as a composite structure with two different dielectric materials or regions. This composite approach allows the device to simultaneously achieve low noise (from the first section) and high signal isolation (from the second section), thereby improving signal transmission efficiency while maintaining circular polarized reception capability
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 device enhances signal isolation and transmission efficiency, particularly for high band (11.7 GHz – 12.2 GHz) circular polarized signals, by optimizing the dielectric constant difference between the two sections, thereby improving noise factor and signal transmission performance.
Implementation Method 1
the medium sheet comprises a first section and a second section, the first section is adjacent to the transmission unit, the second section is adjacent to the opening end, the first section has a first dielectric constant, the second section has a second dielectric constant, and the first dielectric constant is smaller than the second dielectric constant
Data Source
AI summary
A wireless signal transmission device is provided. The wireless signal transmission device includes a reflective surface and a receiver. The reflective surface reflects a wireless signal. The receiver receives the wireless signal reflected. The receiver includes a receiver body, a wave guide, a transmission unit and a medium sheet. The wave guide includes an opening end and a connection end connected thereto. The transmission unit is disposed in the wave guide adjacent to the connection end for receiving the wireless signal. The medium sheet is disposed in the wave guide, wherein the medium sheet comprises a first section and a second section, the first section is adjacent to the transmission unit, the second section is adjacent to the opening end, the first section has a first dielectric constant, the second section has a second dielectric constant, and the first dielectric constant is smaller than the second dielectric constant.