Coaxial Polarizer Structure for Vibration-Stable Multiband Antennas
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Solution Overview
Problem
Existing coaxial antennas face increased wave loss due to vibration and shock, and require multiple antennas for different bands, leading to space inefficiency and high costs.
Innovation Solution
A coaxial polarizer with stepped elements and fasteners to stabilize waveguides, and a multiband antenna design that integrates multiple bands without additional fixing components, using dielectric materials to minimize vibration and shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polarizer is provided in a coaxial structure, then polarization function is achieved, but wave loss increases due to vibration and shock
Solution Approach 1:
The patent applies beforehand cushioning by providing a fixing structure that prevents vibration and shock before they can cause wave loss. The fixing structure includes fixing protrusions and fixing grooves that mechanically couple the polarizer to the coaxial waveguide, stabilizing the polarizer position and preventing relative movement that would generate vibration-induced losses.
2Adaptability or versatility
If multiple antennas are used for different bands, then multiband transmission is achieved, but space efficiency decreases and system complexity increases
Solution Approach 1:
The patent applies merging by integrating multiple band transmission capabilities into a single coaxial antenna structure. The coaxial waveguide system with polarizer can handle multiple frequency bands through a unified structure, eliminating the need for separate antennas for different bands and reducing overall system complexity while maintaining multiband adaptability.
Solution Approach 2:
The patent applies universality by designing the coaxial antenna structure to perform multiple functions - transmitting and receiving different frequency bands, providing polarization control, and maintaining structural stability - all within a single integrated system rather than requiring separate specialized components for each function.
3Stability of the object's composition
If additional fixing components are used to stabilize waveguides, then vibration resistance is improved, but system weight and complexity increase
Solution Approach 1:
The patent applies nested doll by integrating the fixing structure directly into the polarizer and waveguide components themselves. The fixing protrusions and grooves are built-in features of the polarizer assembly that nest with corresponding features in the waveguide, eliminating the need for separate external fixing components and reducing overall structural complexity while maintaining vibration resistance.
Data Source
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AI summary
A coaxial polarizer and a multiband antenna comprising the same are disclosed. The multiband antenna comprises: a first waveguide; a second waveguide, which shares the same axis with the first waveguide and has a greater diameter than the first waveguide; a coaxial polarizer which is provided between the first and second waveguides; a feed horn which is provided at one side of the first and second waveguides; and a reflector which is provided at the other side of the first and second waveguides, wherein the polarizer comprises at least one polarizer fixed to each of the first and second waveguides.