White PaperTransportation
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Across the A&D industry, autonomous technology is driving innovation at an increasingly rapid pace. Developers of autonomous systems will need to overcome the key challenges surrounding more intelligent, aware, and connected platforms. Learn how Ansys software empowers its customers to address these challenges and lead the way in rapidly delivering the next generation of intelligent and connected systems. Download the e-book to learn more.
Overview
The white paper discusses a novel probe positioning system designed for antenna measurements and testing of landed assets, particularly in the context of rover applications. Traditional antenna measurement techniques face significant challenges when applied to in-situ environments, especially on rovers in simulated terrains. The desired measurement data typically covers a hemisphere above the antenna, which is difficult to achieve with conventional methods that rely on movable supports that tilt and rotate.
To address these challenges, the proposed system utilizes a probe suspended by three or more non-conductive cables, which are controlled by winches. This setup allows for precise positioning of the probe within the area enclosed by support towers, enabling the simulation of moving sources and the measurement of antenna patterns without the need for large, rigid structures. The technology has previously been used for flying cameras but has not been applied to antenna measurements until now.
The system's design emphasizes flexibility and precision. By adjusting the lengths of the cables, the probe can be positioned accurately, and an external tracking system can enhance this precision further. The use of non-conductive cables is particularly advantageous in RF applications, as they minimize interference with RF fields and improve safety by not conducting electricity.
The paper also discusses the importance of tower height in relation to the maximum desired probe height, suggesting that a height of 1.5 to 2 times the maximum probe height is optimal. This consideration helps manage cable tension and movement speed. Additionally, the system can be adapted for indoor deployment, allowing the RF payload to be maneuvered over test articles in a controlled manner.
Power for the probe can be supplied through various means, including batteries or solar cells, and control signals can be transmitted via optical fibers or wireless methods. The system can support multiple cables, allowing for greater motion range and control over the probe's orientation, potentially achieving six degrees of freedom.
Overall, this innovative probe positioning system represents a significant advancement in antenna measurement techniques, offering a practical solution for in-situ testing on rovers and other applications in aerospace and beyond.