Orthomode Transducer Layout for Compact Multi-Band Polarization Separation
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Solution Overview
Problem
Existing orthomode transducers for miniaturized satellites, such as Cubesats, face challenges in being compact, lightweight, and capable of maintaining high performance across multiple frequency bands while effectively separating and processing polarizations for both reception and transmission.
Innovation Solution
A compact orthomode transducer design featuring a cylindrical waveguide body with a junction body and dichroic separator, allowing for efficient frequency and polarization separation, integrated with a polarizer and interception member to form an antenna that operates over a broad frequency band and supports circular to linear polarization conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional orthomode transducers are used, then polarization separation function is achieved, but device size and weight increase
Solution Approach 1:
The patent combines the waveguide body and junction body into a single integrated orthomode transducer structure. The junction body is positioned inside the waveguide body with shared walls, eliminating the need for separate components and reducing overall weight while maintaining polarization separation functionality through the integrated design.
Solution Approach 2:
The junction body is nested within the waveguide body, with the junction body's outer surface forming part of the waveguide body's internal structure. This nesting arrangement allows both components to occupy overlapping spatial volumes, minimizing total device size and weight while preserving the orthomode transducer's polarization separation capability.
2Reliability
If traditional orthomode transducers are used, then polarization separation function is achieved, but device volume increases
Solution Approach 1:
The patent combines the waveguide body and junction body into a single integrated orthomode transducer structure. The junction body is positioned inside the waveguide body with shared walls, eliminating the need for separate components and reducing overall volume while maintaining polarization separation functionality through the integrated design.
Solution Approach 2:
The junction body is nested within the waveguide body, with the junction body's outer surface forming part of the waveguide body's internal structure. This nesting arrangement allows both components to occupy overlapping spatial volumes, minimizing total device volume while preserving the orthomode transducer's polarization separation capability.
3Weight of moving object
If miniaturized components are used, then satellite size and weight are reduced, but antenna performance decreases
Solution Approach 1:
The patent optimizes the geometric parameters of the integrated orthomode transducer, including the dimensions and positioning of the junction body within the waveguide body, to maintain antenna performance while minimizing size. The design carefully controls the physical parameters to ensure proper electromagnetic wave propagation and polarization separation in the miniaturized structure.
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 solution enables a compact, high-performance antenna that can efficiently process signals across a wide frequency band, ensuring effective signal reception and transmission with reduced size and weight, suitable for integration into miniaturized satellites like Cubesats.
Implementation Method 1
a waveguide body (21), which acts as a waveguide
Implementation Method 2
dichroic separator, allowing for efficient frequency and polarization separation
Implementation Method 3
the antenna must separate the received signal into two signals with linear polarizations
Data Source
Figure 1~5B
Figure 2A~2B
Figure 3~4B
AI summary
The orthomode transducer for antenna comprises a waveguide body extended along a longitudinal axis and comprising a first end and a second end, a first port connected to the first end of the waveguide body, and a second port, the two ports being suitable to be connected to an electronic circuit. The application also describes an antenna for satellites that comprises the orthomode transducer, a polarizer connected to the orthomode transducer, and an interception member connected to the polarizer.