3D-Printed Dual-Polarized Vivaldi Arrays With Triangular Lattices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Vivaldi antennas are thick, expensive to fabricate, and have high cross-polarization issues, with traditional fabrication methods like electronic discharge machining and hand soldering being time-consuming and costly, while dual-polarized Vivaldi arrays typically use square lattices that limit performance and flexibility.
Innovation Solution
3D printing of dual-polarized Vivaldi arrays on both square and triangular lattices using direct metal laser sintering, incorporating modular designs with SMPM connectors, tapered transmission line baluns, and perforated ground plane skirts to meet DMLS fabrication rules, allowing for rapid, low-cost production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional fabrication methods (electronic discharge machining or hand soldering) are used for Vivaldi arrays, then manufacturing precision can be achieved, but fabrication cost and time increase significantly
Solution Approach 1:
The patent changes the fabrication method from subtractive (machining) or assembly-based (soldering) to additive manufacturing (3D printing). This parameter change in the manufacturing process enables complex geometries to be produced directly without multiple machining steps or manual assembly, significantly reducing fabrication time while maintaining precision through digital control of the printing process
Solution Approach 2:
The patent replaces traditional mechanical fabrication methods (discharge machining, hand soldering) with an additive manufacturing system. This substitution eliminates the need for complex mechanical tooling and manual operations, reducing both fabrication time and labor costs while achieving comparable or superior precision through computer-controlled deposition
2Ease of operation
If Vivaldi antennas are designed with standard geometry, then ease of design is maintained, but cross-polarization increases when scanning in the D-plane
Solution Approach 1:
The patent introduces asymmetric modifications to the standard Vivaldi geometry, specifically in the ground plane configuration and antenna element orientation. These asymmetric design changes balance the radiation patterns and reduce cross-polarization components during scanning operations, while the modifications remain straightforward to implement in the design phase
Solution Approach 2:
The patent applies local modifications to specific regions of the Vivaldi antenna structure, such as adjusting the ground plane shape or element spacing in critical areas. These localized quality changes target the specific regions that generate cross-polarization, reducing the harmful effect without requiring complete redesign of the entire antenna structure
3Device complexity
If square lattice is used for dual-polarized Vivaldi arrays, then integration of vertical and horizontal polarized elements is simplified, but unit cell area and gain are limited
Solution Approach 1:
The patent transitions from a square lattice arrangement to a triangular lattice arrangement for the antenna elements. This dimensional reconfiguration of the lattice geometry increases the unit cell area by 15.5%, allowing more elements to be packed into the same aperture while maintaining the dual-polarized structure. The triangular lattice provides a more efficient space-filling pattern that maximizes the use of available space
4Area of stationary object
If triangular lattice is used for Vivaldi arrays, then unit cell area and gain increase, but design and fabrication complexity increases
Solution Approach 1:
The patent uses additive manufacturing (3D printing) to fabricate the triangular lattice structure. This manufacturing substitution eliminates the complexity of assembling triangular lattices using traditional mechanical methods, as the entire structure can be printed as a single integrated component or modular units that snap together, greatly simplifying the fabrication process despite the geometric complexity
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 3D printed arrays offer low-profile, ultra-wideband performance with improved gain and flexibility, reducing fabrication costs and time, and enabling integration into complex surface shapes, with performance comparable to traditional methods.
Implementation Method 1
Printing the antenna directly from metal using direct metal laser sintering (DMLS)
Implementation Method 2
3D printed using direct metal laser sintering (DMLS)
Data Source
AI summary
A 3-D printable dual-polarized Vivaldi array may include a plurality of Vivaldi antennas having a 3-D printed modular construction that meets direct metal laser sintering fabrication design rules; a plurality of Sub-Miniature Push-on, Micro (SMPM) connectors forming a plurality of ground plane skirts supporting a lattice, each SMPM Connector having a detent. The 3-D printable dual-polarized Vivaldi array may further include a support structure between the lattice and the ground plane skirt; the ground plane skirt having a skirt swept forward angle of 40 to 60 degrees.