Radiofrequency Module With Curved Waveguides
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Solution Overview
Problem
Designing high-frequency antenna arrays is challenging due to the need for close spacing of radiating elements to reduce secondary lobes, which conflicts with the size requirements of polarizers and electronic amplification circuits, leading to undesirable side lobes and limited flexibility in element positioning.
Innovation Solution
A passive radiofrequency module with a layered structure comprising radiating elements, waveguides, and ports, where the waveguides transmit signals between the layers, allowing independent spacing of elements and ports, and can converge or diverge to optimize lobe reduction or element size, using additive manufacturing for precise assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If radiating elements are placed closely together to reduce secondary lobes, then transmission/reception performance is improved, but the minimum spacing required by polarizers and electronic circuits cannot be satisfied
Solution Approach 1:
The patent transitions from a planar arrangement to a three-dimensional stacked architecture with multiple layers (radiating element layer, waveguide layer, polarizer layer, electronic circuit layer). This vertical dimensionality allows radiating elements to be closely spaced in the horizontal plane while polarizers and circuits are accommodated in separate vertical layers, resolving the spacing conflict.
Solution Approach 2:
The system is divided into functionally independent layers: radiating elements form one layer, waveguides form another layer, polarizers form a third layer, and electronic circuits form a fourth layer. This segmentation allows each component to be optimized for its specific function without spatial interference from other components.
2Reliability
If polarizers and electronic circuits are given sufficient size for proper operation, then their functionality is ensured, but the spacing between radiating elements increases causing undesirable secondary lobes
Solution Approach 1:
By stacking polarizers and electronic circuits in vertical layers separated from the radiating element layer by waveguide layers, the patent provides sufficient horizontal space for polarizers and circuits to function properly while maintaining close horizontal spacing of radiating elements. The vertical separation eliminates the trade-off between component size and element spacing.
3Ease of manufacture
If radiating elements are spaced widely to accommodate polarizers and circuits, then component placement is facilitated, but transmission cone requirements and element positioning flexibility are compromised
Solution Approach 1:
The stacked layer architecture provides vertical space for component placement while maintaining a compact horizontal footprint. This allows radiating elements to be positioned closely together for flexible array configurations and transmission cone optimization, while polarizers and circuits are placed in separate vertical layers above or below the radiating element plane.
Solution Approach 2:
Separating components into distinct functional layers allows independent optimization of each layer's layout. The radiating element layer can be designed for optimal electromagnetic performance with close element spacing, while other layers are designed for their respective component placement requirements without interfering with each other.
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 reduces secondary lobes by bringing radiating elements closer together while allowing for larger port spacing, facilitating the placement of electronic circuits and polarizers, and enabling flexible arrangement of elements without increasing overall dimensions.
Implementation Method 1
each waveguide being intended to transmit a radiofrequency signal in one or other direction between a port of the fourth layer and a radiating element
Data Source
AI summary
Radiofrequency module, including: a first layer including an array of radiating elements, each radiating element having a cross section for supporting at least one wave propagation mode, a second layer forming an array of waveguides; a fourth layer forming an array of ports; the second layer being interposed between the first and the fourth layer; each waveguide being connected to a port on the one hand and to a radiating element on the other hand for transmitting a radiofrequency signal between this port and this radiating element; the spacing between two ports being different from the spacing between the radiating elements, so that the surface area of the first layer is different from the surface area of the fourth layer; the waveguides being curved.