RF Aperture Interface Board with Tapered Projections for Low Interference
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Solution Overview
Problem
Current RF aperture designs face challenges in achieving compactness, lightweightness, and efficient broadband RF capture due to limitations in their structural and electrical configurations, which affect their scalability and interference mitigation capabilities.
Innovation Solution
The RF aperture design incorporates an interface board with an array of electrically conductive tapered projections that extend from the front side and are securely fastened to the board, featuring hollow or solid structures with central cylinder supports, dielectric fillers, and RF circuitry on the back side, allowing for differential RF receive and transmit elements and mitigating potential interference through standoffs and perpendicular PCBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional RF aperture designs are used, then broadband RF capture is achieved, but the structure becomes heavy and non-scalable
Solution Approach 1:
The RF aperture is divided into multiple independent interface boards, each containing a subset of the total electrically conductive tapered projections. This segmentation allows individual boards to be manufactured separately and then assembled into larger aperture configurations, enabling scalability while maintaining lightweight construction. Each interface board functions as an independent module that can be replicated and combined to achieve different aperture sizes and configurations.
2Productivity
If electrically conductive tapered projections are densely arranged, then RF capture efficiency improves, but interference between adjacent elements increases
Solution Approach 1:
Electrically conductive material is deposited on the tapered projections to create controlled electrical connections while maintaining physical separation between adjacent elements. The tapered geometry combined with selective conductive coating allows adjacent projections to be closely spaced for efficient RF capture while the controlled conductivity prevents unwanted interference, as the conductive material is applied only where needed to establish proper electrical isolation and signal extraction.
3Volume of moving object
If interface board thickness is reduced for compactness, then overall aperture size decreases, but structural support and electrical connection reliability deteriorate
Solution Approach 1:
The electrically conductive tapered projections extend in the vertical dimension perpendicular to the interface board surface, allowing the RF aperture to achieve its functional volume primarily through the projection height rather than board thickness. This dimensional transition enables the use of thin interface boards for compactness while the protruding projections provide the necessary structural support, electrical connection points, and RF interaction surface area.
4Reliability
If electrically conductive material is applied extensively on projections, then electrical connectivity improves, but manufacturing complexity and cost increase
Solution Approach 1:
Electrically conductive material is applied selectively and locally to specific regions of the tapered projections rather than uniformly across the entire surface. The conductive coating is deposited only where electrical connections are required, such as at the base of projections for signal extraction or at specific heights for inter-element coupling. This localized application maintains reliable electrical connectivity while significantly reducing material usage and manufacturing complexity compared to extensive coating.
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 a compact, lightweight, and scalable RF aperture with enhanced broadband RF capture and reduced interference, facilitating flexible beam steering and increased aperture size through modular design.
Implementation Method 1
an array of electrically conductive tapered projections having bases disposed on the front side of the interface board and extending away from the front side of the interface board
Data Source
AI summary
A radio frequency (RF) aperture includes an interface board. An array of electrically conductive tapered projections have bases disposed on a front side of the interface printed circuit board and extend away from the front side of the interface printed circuit board. RF circuitry is disposed at the back side of the interface board and is electrically connected with the electrically conductive tapered projections.