TUNABLE ANTENNAS FOR CLOSED-LOOP SYSTEMS

Sammanfattning: Tunable antennas have emerged as a promising technology to address the challenges of achieving optimal performance across a wide range of frequencies. This abstract presents a study focused on designing and implementing an ideal antenna system design within a closed-loop system. Background. Tunable antennas offer a solution for achieving efficient signal transmission and reception over a broad spectrum. Traditionally fixed-frequency antennas have limitations in terms of bandwidth and efficiency, making them unfit for applications requiring adaptability to varying frequencies. The integration of tunable components in antenna systems results in greater flexibility and improved performance. Objectives. The main objective of this research is to evaluate and determine the ideal antenna design for closed-loop antenna systems which achieves maximum frequency coverage and efficiency. This involves the design of an architecture that seamlessly integrates components. Methods. The experimental methodology involves designing an antenna system design. The selected components are interconnected in a closed loop, allowing continuous monitoring and adjustment of the antenna’s characteristics. The Micro Controlling Unit (MCU) is programmed using the Arduino Integrated Development Environment (IDE), serves as the controller for managing the antenna tuner’s settings based on real-time feedback from the directional coupler and power detector. The bi-directional logic level converter ensures proper voltage compatibility between the MCU and the antenna tuner. Results. The results of the study showed that the proposed antenna system architecture was able to achieve the desired goals. The implemented closed-loop system demonstrates significant enhancements in frequency coverage and efficiency of the selected antenna. The antenna system was also able to maintain its efficiency even when the environment changed. Conclusions. The experimental results show that in closed-loop systems the performance of an antenna is optimised. The integration of the components enables dynamic frequency tuning, by enhancing the antenna’s maximum frequency coverage and efficiency. The results underscore the potential of tunable antennas in revolutionizing wireless communication systems, showing the way for more adaptable and high-performance devices in various applications.