Parabolic Antenna Source Sigma Delta Radiating Assemblies
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Solution Overview
Problem
Existing microwave sources for parabolic antennas require frequent disassembly and reconfiguration to switch between different frequency bands, leading to alignment errors and increased costs due to the need for complex dual-band or multiband designs, including expensive dichroic surfaces and challenging waveguide excitations.
Innovation Solution
A parabolic antenna source comprising sigma and delta radiating assemblies with eight delta radiating elements arranged at 45-degree angular spacing, allowing independent generation of sigma and delta channel radiation, which improves decoupling between frequency bands and eliminates the need for dichroic surfaces and complex waveguides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single source is used for multiple frequency bands, then the device complexity is reduced, but the manufacturing precision and alignment accuracy deteriorate due to frequent disassembly and reconfiguration
Solution Approach 1:
The source is segmented into distinct radiating assemblies (sigma and delta channels) with fixed positions relative to the parabolic reflector. Each assembly handles specific frequency bands, eliminating the need for disassembly and reconfiguration while maintaining precise alignment.
Solution Approach 2:
The source is designed as a universal multi-functional unit that can simultaneously handle multiple frequency bands (L, S, C bands) through different radiating assemblies, eliminating the need for separate sources for each band and avoiding alignment errors from reconfiguration.
2Adaptability or versatility
If dual-band or multiband designs are implemented, then the adaptability is improved, but the device complexity and cost increase due to dichroic surfaces and multiple sources
Solution Approach 1:
Multiple radiating assemblies for different frequency bands are merged into a single integrated source structure with fixed positions relative to the parabolic reflector. This eliminates the need for complex dichroic surfaces and multiple separate sources while maintaining multi-band adaptability.
Solution Approach 2:
The antenna source is designed as a universal multi-functional unit that can simultaneously handle multiple frequency bands through different radiating assemblies, eliminating the need for complex dual-reflector systems and dichroic surfaces.
3Adaptability or versatility
If waveguides are used to generate radiation in multiple frequency bands, then the adaptability is improved, but the ease of manufacture deteriorates due to difficult excitation and complex dimensioning
Solution Approach 1:
The complex waveguide excitation structures are extracted and replaced with simpler radiating assemblies that can be directly positioned at fixed locations relative to the parabolic reflector, eliminating the need for difficult waveguide dimensioning and excitation while maintaining multi-band operation 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 solution enables easier design and operation of the antenna source, allowing simultaneous reception and tracking in multiple frequency bands with improved decoupling, reduced bulk, and enhanced tracking performance, eliminating the need for costly dual-reflector systems and minimizing alignment errors.
Implementation Method 1
a sigma radiating element positioned on a main transmit/receive axis of the source, and a sigma power supply circuit for powering the sigma radiating element such that the sigma radiating element generates radiation sigma channel
Implementation Method 2
a delta radiating assembly comprising eight delta radiating elements, arranged around the main transmit/receive axis of the source, and a delta power supply circuit for powering the delta radiating elements so that the delta radiating elements generate delta channel radiation
Implementation Method 3
The function of the reflector is to direct the signal emitted by the source towards the target or to concentrate the signal emitted by the target on the source
Data Source
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AI summary
The invention relates to a source (S) for a parabolic antenna, comprising: • - a sigma radiating assembly (1S, 1C, 1L) suitable for generating the sigma channel including a sigma radiating element (11) positioned on a main transmission/reception axis (A) of the source (S), and a sigma supply circuit (12) to supply the sigma radiating element (11), and • - a delta radiating assembly (2S, 2C, 2L) suitable for generating the delta channel including eight delta radiating elements (21S, 21C, 21L), arranged around the main transmission/reception axis (S) of the source (S), and a delta supply circuit (22S, 22C, 22L).