Beam-Switching Antenna Switching Matrix Architecture
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Solution Overview
Problem
Existing beam switching antennas with a large number of antenna elements become complex and inefficient when trying to supply multiple adjacent elements with different signals, particularly in generating symmetrical beams with eight adjacent antenna elements constructed from four signals of different amplitudes.
Innovation Solution
The beam switching antenna employs two switching matrices with Log2(N) stages, each stage comprising N/2 matrix switches with two inputs and two outputs, arranged in a specific interconnection pattern to distribute signals efficiently to 2N adjacent antenna elements, allowing for symmetrical beam generation with reduced complexity and loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional switching matrices are used to supply multiple adjacent antenna elements with different signals, then the number of signal combinations increases, but the device complexity and insertion losses increase significantly
Solution Approach 1:
The patent divides the switching matrix into multiple stages, where each stage handles a subset of the signal routing. This segmentation allows the system to achieve the same adaptability with simpler, more manageable switching units at each stage, reducing overall device complexity while maintaining the capability to supply multiple adjacent antenna elements with different signals.
Solution Approach 2:
The patent introduces a spatial dimension to the switching architecture by arranging switching units in a specific geometric pattern (e.g., hexagonal or triangular lattice). This spatial arrangement enables signal distribution to multiple adjacent antenna elements through geometric relationships rather than through complex sequential switching, reducing the number of required signal combinations while maintaining versatility.
2Adaptability or versatility
If conventional switching matrices are used to supply multiple adjacent antenna elements with different signals, then signal distribution capability is maintained, but insertion losses and amplitude/phase dispersions increase
Solution Approach 1:
The patent pre-arranges the switching units in a specific geometric configuration that anticipates the signal distribution requirements. This preliminary structural arrangement allows signals to reach multiple adjacent antenna elements through direct geometric pathways, minimizing the number of switching operations required and thereby reducing cumulative insertion losses and amplitude/phase dispersions.
Solution Approach 2:
By introducing a spatial dimension to the switching architecture, the patent creates direct geometric pathways for signal distribution. This allows signals to reach multiple antenna elements through shorter, more direct routes compared to conventional sequential switching, reducing the number of switching stages and minimizing energy losses.
3Area of stationary object
If the number of antenna elements is increased to improve beam coverage, then the area covered is increased, but the switching matrix complexity increases rapidly
Solution Approach 1:
The patent segments the large antenna array into multiple smaller groups, each served by a dedicated switching unit in the geometric lattice. This allows the system to support a large total number of antenna elements without requiring a single complex switching matrix, as each segment can be controlled independently with simpler switching logic.
Solution Approach 2:
The patent arranges switching units and antenna elements in a two-dimensional geometric lattice structure. This spatial arrangement allows the system to scale to large numbers of antenna elements by adding more lattice points rather than increasing the complexity of a single switching matrix, enabling large beam coverage areas with manageable local switching complexity.
Data Source
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AI summary
The antenna (10) has antennal elements (14) placed around a cylindrical surface along increasing numbers. Distribution switches (52) at input and outputs of distribution block (20) are connected to a switching matrix (50) at the input and the elements of unpaired order at the output, and are connected to another switching matrix (48) at the input and the elements of paired order at the output. The elements, whose number remains in Euclidean division by 2N, are connected to the numbered distribution switches. Each switch is connected to output of the matrices of same number.