Corrugated Feed Horn Beam Pattern Control
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Solution Overview
Problem
Conventional feed horns for low noise block down-converters face challenges in minimizing spillover loss without increasing the radius, which affects signal quality and production costs.
Innovation Solution
The feed horn design incorporates a conical body with corrugations featuring multiple first and second openings that act as slits to induce an interference effect, adjusting the beam pattern and reducing spillover loss without enlarging the horn's radius.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the number of corrugations or the radius of the feed horn is increased to improve spillover loss, then the spillover loss is reduced, but the volume and production cost increase
Solution Approach 1:
The patent changes the geometric parameters of the corrugations by introducing multiple openings (first and second openings) with specific dimensions, positions, and patterns. This modifies the electromagnetic field distribution within the corrugations, enabling improved spillover loss performance without increasing the overall feed horn radius or volume.
Solution Approach 2:
The patent applies local quality by creating non-uniform structures within the corrugations through the strategic placement of openings at different positions, heights, and orientations. Each opening can have different dimensions and shapes, allowing localized modification of electromagnetic properties to optimize beam pattern and reduce spillover loss in specific regions without affecting the entire structure.
2Loss of energy
If the number of corrugations or the radius of the feed horn is increased to improve spillover loss, then the spillover loss is reduced, but the production cost increases
Solution Approach 1:
The patent optimizes production cost by carefully selecting and controlling the parameters of the openings (number, size, position, shape) to achieve the desired electromagnetic performance with minimal structural complexity. This allows for cost-effective manufacturing while maintaining improved spillover loss characteristics.
3Loss of energy
If the beam width is narrowed and side lobes are reduced to improve beam pattern, then the spillover loss is reduced, but the structural complexity increases
Solution Approach 1:
The patent segments the corrugation structure by introducing multiple discrete openings (first openings and second openings) within each corrugation. This segmentation allows independent optimization of each opening's parameters while maintaining the overall corrugation geometry, achieving improved beam pattern without excessive structural complexity.
Solution Approach 2:
The patent applies local quality by creating non-uniform structures within the corrugations through the strategic placement of openings at different positions, heights, and orientations. Each opening can have different dimensions and shapes, allowing localized modification of electromagnetic properties to optimize beam pattern and reduce spillover loss in specific regions without affecting the entire 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
This design enhances signal quality by narrowing the beam width and reducing side lobes, achieving better spillover loss performance without increasing the horn's volume or production costs, while offering design flexibility through adjustable opening parameters.
Implementation Method 1
the plurality of first openings and the plurality of second openings are used as slits to induce an interference effect to adjust a beam pattern of the feed horn
Data Source
AI summary
A feed horn for a Low Noise Block down converter is disclosed. The feed horn includes a conical body for gathering satellite signals and a connector coupled to the conical body for coupling the feed horn to a waveguide of the Low Noise Block down converter to transmit the satellite signals to the waveguide. The conical body includes a plurality of corrugations, one of the plurality of corrugations includes a plurality of first openings, and a plurality of second openings, each of the plurality of second openings is formed between the two adjacent first openings, wherein the plurality of first openings and the plurality of second openings are used as slits to induce an interference effect to adjust a beam pattern of the feed horn.