Multilayer Microwave Distribution Network for Dense Beam Steering
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Solution Overview
Problem
Current microwave distribution networks in multibeam antenna systems face limitations in reducing the distance between neighboring beams, which restricts the resolution capability and efficiency of beam steering.
Innovation Solution
The proposed Overlapped Distribution Network (ODIN) employs a hexagonal or square lattice structure with unit cells connected via coaxial inputs and transmission lines, where each unit cell is connected to three or four neighbors, respectively, with orientations alternating between layers to achieve efficient power distribution and overlapping radiation areas, allowing for reduced inter-beam distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between phase centres of adjacent beams is reduced to increase beam density, then the resolution capability and beam steering efficiency are improved, but the radiation areas overlap excessively causing interference and loss of signal integrity
Solution Approach 1:
The distribution network is segmented into multiple layers, with each layer responsible for distributing signals to specific groups of radiating elements. This segmentation allows independent control of radiation patterns in different layers, enabling precise management of radiation area overlap while maintaining high beam density
Solution Approach 2:
The patent transitions from a planar distribution network to a three-dimensional multi-layer structure. By adding the vertical dimension with multiple layers stacked along the Z-axis, the system can achieve higher beam density in the horizontal plane while using the vertical dimension to separate and control overlapping radiation areas, thus reducing interference
2Measurement precision
If more radiating elements are packed into the antenna aperture to increase system resolution, then the resolution capability is improved, but the distance between neighbouring beams increases reducing beam density
Solution Approach 1:
By stacking multiple distribution layers along the Z-axis, the patent effectively increases the number of available phase centers from a two-dimensional array to a three-dimensional configuration. This allows the system to maintain small distances between neighbouring beams while packing more radiating elements into the aperture, thereby increasing both beam density and resolution capability simultaneously
Solution Approach 2:
The patent implements a nested structure where multiple distribution networks are stacked within each other along the vertical axis. Each layer is nested within the overall antenna aperture, allowing dense packing of radiating elements while maintaining proper spacing between beams through the vertical separation provided by the nested layers
3Productivity
If a complex distribution network structure is used to achieve high beam density and overlap control, then the beam steering efficiency is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The distribution network is divided into multiple independent layers, each with its own set of transmission lines and phase shifters. This segmentation allows each layer to be controlled independently, simplifying the overall control architecture while achieving high beam steering efficiency through coordinated operation of all layers
Solution Approach 2:
The patent implements dynamic phase shifting capabilities in each layer, allowing the system to adaptively adjust the phase of signals distributed to different radiating elements. This dynamic control enables efficient beam steering and formation while maintaining manageable device complexity through programmable phase adjustment rather than fixed complex routing
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 effective overlapping of radiation areas, provides passive and reciprocal operation, and allows for simultaneous transmission and reception, while enabling the use of active elements, resulting in improved beam steering and increased radiating element density.
Implementation Method 1
The microwave distribution network comprises a stacking of several layers, each of the layers comprising a plurality of unit cells, wherein the unit cells comprise a coaxial input connected to three transmission lines
Data Source
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AI summary
Microwave distribution network, comprising a stacking of several layers (4), each of the layers (4) comprising a plurality of unit cells (1), wherein: - the unit cells (1) comprise a coaxial input (2) connected to three transmission lines (3) with an angular span of 120º, the coaxial input (2) being orientated on an Z-axis of a Cartesian system of axes in which the three transmission lines (3) are on an XY plane, - the layers (4) are configured as a hexagonal lattice formed with the unit cells (1) by periodical replication, with the coaxial inputs (2) placed at the corners of the hexagons, such that each unit cell (1) is connected to three neighbour unit cells, the coaxial inputs (2) of the three neighbour unit cells being oriented on an Z-axis of a Cartesian system of axes in which the three transmission lines (3) are on an XY plane, such that this orientation on the Z-axis is opposite to the orientation of the coaxial input (2) of the former unit cell (1) on the same Z-axis, - the distance between coaxial inputs (2) is such that it satisfies ¼ of the wavelength conditions, and - the adjacent layers (4) are interconnected by means of the coaxial inputs (2) of the unit cells that are arranged in opposite directions.