Multi-beam antenna source block with delta-shaped sub-arrays
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Solution Overview
Problem
Current multi-beam antenna systems face geometric constraints and orthogonality constraints that complicate the arrangement of elementary sources and beamforming networks, making it difficult to achieve efficient frequency reuse and radiation patterns without increasing the complexity of the system.
Innovation Solution
A multi-beam source block configuration with delta-shaped sub-arrays, where each sub-array consists of three adjacent elementary sources forming an equilateral triangle, and multiple splitters to generate excitation signals for different frequency/polarization pairs, allowing for interleaving of sub-networks without orthogonality constraints, enabling efficient frequency reuse and radiation pattern optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multi-beam antenna systems use regular geometric arrangements of elementary sources, then the system structure is simple, but orthogonality constraints complicate the arrangement and reduce flexibility for frequency reuse
Solution Approach 1:
The patent applies asymmetry by transitioning from regular geometric arrangements to irregular delta-shaped sub-arrays. The elementary sources are positioned at non-uniform intervals, with sub-arrays formed by three sources defining a first direction with specific pitch relationships. This asymmetric positioning eliminates orthogonality constraints while maintaining system functionality, allowing greater flexibility in frequency reuse patterns.
2Productivity
If elementary sources are shared across multiple beams to improve radiation efficiency, then resource utilization increases, but geometric constraints make it difficult to achieve proper spatial decoupling
Solution Approach 1:
The patent resolves geometric constraints by introducing a new dimensional relationship through the delta-shaped sub-array configuration. Instead of relying on traditional orthogonal spatial separation, the invention positions sources such that sub-arrays are offset by pitches corresponding to elementary source intervals, creating a first direction with specific geometric relationships. This dimensional reconfiguration enables source sharing while maintaining proper beam formation.
3Productivity
If the system uses four-color frequency reuse scheme to increase capacity, then system capacity improves, but the arrangement of sub-networks becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the multi-beam system into distinct delta-shaped sub-arrays, each handling specific frequency/polarization combinations. The elementary sources are grouped into sub-arrays of three sources each, with each sub-array configured to support specific color assignments in the four-color reuse scheme. This segmentation simplifies the management of frequency reuse by creating modular, independent sub-network units.
Data Source
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AI summary
The invention relates to a multi-beam source block (S0, S1, S2) for a multi-beam antenna (10), the source block comprising a plurality of identical adjacent elementary sources (100), arranged in sub-arrays (R) of identical shape, the source block being characterized in that the sub-array (R) is formed of three adjacent elementary sources (S10, S11, S12), defining a first direction (X) passing through two of the three sources (S10, S11), the source comprising at least two sub-arrays (R11, R12) forming a first line (L1) along the first direction (X), the two sub-arrays (R11, R12, R13) being offset, in the first direction (X), by a step (L) corresponding to an elementary source, such that at least one elementary source (S11) belongs to both sub-arrays (R11, R12), the two consecutive sub-arrays (R11, R12) being excited to two different colors by at least one distributor.