Multi-band Antenna Device with Shared Reflective Mirrors
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Solution Overview
Problem
Conventional antenna devices are unable to emit beams in multiple frequency bands, limiting their functionality and efficiency in satellite communication systems.
Innovation Solution
The antenna device incorporates a first and second beamforming circuit, each capable of forming radio waves with orthogonal polarized waves in different frequency bands, and a plurality of primary radiators connected to these circuits, allowing for the emission of beams in both frequency bands using horn antennas with coaxial cylindrical waveguides and connecting waveguides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple primary radiators with multiple reflective mirrors are used to increase gain in service areas, then beam density and communication speed are improved, but the number of reflective mirrors increases beyond satellite mounting limits
Solution Approach 1:
The patent combines multiple beamforming circuits into a single integrated antenna system where multiple primary radiators share common reflective mirrors. The beamforming circuits process signals for multiple frequency bands and distribute them to appropriate radiators, eliminating the need for separate mirror assemblies for each beam while maintaining high gain coverage across service areas.
Solution Approach 2:
The reflective mirrors are designed to serve multiple functions by reflecting beams from multiple primary radiators across different frequency bands. A single mirror structure can handle signals from different radiators simultaneously, making the mirror system universal rather than dedicated to a single radiator or frequency band.
2Device complexity
If beamforming circuits are added to reduce the number of reflective mirrors, then the number of mirrors is reduced, but the ability to emit beams in multiple frequency bands is lost
Solution Approach 1:
The beamforming circuit is segmented into multiple independent processing channels, each capable of handling different frequency bands. This segmentation allows the single mirror system to receive multi-frequency signals from multiple radiators and direct them appropriately without requiring separate mirror assemblies for each frequency band.
Solution Approach 2:
The patent adds the frequency band dimension to the beamforming capability. Instead of having separate physical mirror structures for different frequencies, the system uses a single spatial structure (mirrors) enhanced with multi-dimensional signal processing in the frequency domain through the beamforming circuits.
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 configuration enables the antenna device to effectively emit beams in multiple frequency bands, enhancing its capability to cover service areas with improved gain and efficiency.
Implementation Method 1
The plurality of coaxial waveguides each include an inner waveguide having one end connected to an inner waveguide of a corresponding one of the plurality of horn antennas, and each inner waveguide of the plurality of coaxial waveguides includes another end connected to the first beamforming circuit
Implementation Method 2
each of the plurality of primary radiators comprises a horn antenna including a coaxial cylindrical waveguide
Implementation Method 3
a first beamforming circuit for forming a radio wave including two polarized waves orthogonal to each other in a first frequency band to output the radio wave in the first frequency band
Data Source
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AI summary
An antenna device includes a beamforming circuit (3) that forms a radio wave in a first frequency band, including two polarized waves orthogonal to each other, and outputs the radio wave in the first frequency band, a beamforming circuit (6) that receives the radio wave in the first frequency band output from the beamforming circuit (3), and outputs a the radio wave in the first frequency band, and forms a radio wave in a second frequency band, including two polarized waves orthogonal to each other, and outputs the radio wave in the second frequency band, and primary radiators (7) that emit a beam in the first frequency band in response to the radio wave in the first frequency band output from the beamforming circuit (6), and emit a beam in the second frequency band in response to the radio wave in the second frequency band output from the beamforming circuit (6).