Shunt-Loaded Notch Array Radiator for Compact Wideband Assembly
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Solution Overview
Problem
Existing notch-based antenna elements are non-modular, exhibit excessive volume and weight, and are sensitive to conductive back-plates, limiting their scalability and practicality in certain applications, particularly in cylindrical arrays requiring wideband operation.
Innovation Solution
A shunt-loaded notch element design with a modularized assembly and tongue-and-groove azimuthal crosswall, allowing for compact, lightweight, and scalable cylindrical arrays with improved bandwidth and reduced element depth, utilizing a shunt-loaded stepped-impedance gap scheme and high-precision machining for repeatable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional notch-based antenna elements are used, then ultra-wideband performance and simple single-ended 50 ohm feeding are achieved, but excessive volume and weight occur
Solution Approach 1:
The antenna element is divided into a radiating element and a separate ground plane that can be positioned at a distance, eliminating the need for a large continuous conductive structure. This segmentation allows the radiating element to maintain UWB performance while significantly reducing the overall volume and weight of the antenna system.
Solution Approach 2:
The ground plane is moved from a co-planar configuration to a spatially separated configuration along the z-axis. This dimensional change allows the radiating element to operate with reduced depth while maintaining electromagnetic performance, effectively solving the volume constraint without sacrificing UWB characteristics.
2Quantity of substance
If traditional notch-based antenna elements are used, then ultra-wideband performance is maintained, but excessive weight occurs
Solution Approach 1:
By separating the radiating element from the ground plane, the design eliminates the need for heavy continuous conductive structures. The radiating element can be made lightweight while the ground plane is positioned remotely, reducing overall weight without compromising UWB performance.
Solution Approach 2:
The radiating element employs thin-walled or minimal-material construction that maintains structural integrity while minimizing weight. This approach allows the antenna to achieve UWB performance with significantly reduced mass compared to traditional bulky notch antenna designs.
3Object-affected harmful factors
If traditional notch-based antenna elements are used, then simple single-ended 50 ohm feeding is achieved, but sensitivity to conductive back-plates occurs
Solution Approach 1:
The separation of the radiating element from the ground plane isolates the feeding structure from interfering conductive surfaces. This spatial segmentation reduces sensitivity to back-plate effects while maintaining the simplicity of single-ended 50 ohm feeding, as the radiating element operates in a more controlled electromagnetic environment.
4Ease of manufacture
If traditional notch-based antenna elements are used, then contiguous adjacent element connection is achieved, but non-modular assembly occurs
Solution Approach 1:
The antenna elements are designed as independent modular units with standardized interfaces. Each element can be manufactured separately and assembled into arrays without requiring complex contiguous connections, significantly improving manufacturability and scalability while reducing assembly complexity through repetition of standardized components.
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
The solution enables 30% improved bandwidth and reduced element depth, facilitating easier assembly and integration while maintaining ultra-wideband performance and insensitivity to conductive back-plates, thus addressing the limitations of traditional notch elements.
Implementation Method 1
The notch electrical design process features an impedance transition to free-space over a contiguous stepped or tapered slot-line
Implementation Method 2
adjacent capacitively-coupled gaps, present at the edges of the antenna element
Data Source
AI summary
Systems and methods are provided for enabling a notch-based element that retains traditional notch ultra wideband (UWB) performance while having a highly-producible/-scalable structure, high power handling, a simple single-ended 50 ohm feeding, and relative insensitivity to a conductive back-plate. Embodiments of the present disclosure improve upon the traditional notch structure to further offer shorter element depth, lighter weight, and modularized assembly.