Automated Robotic arms redefine the limits of antenna characterization. This paper presents a method to estimate the far-field radiation pattern of antennas utilizing near-field measurements through the use of a 6-axis robotic arm. The innovation of our project lies in overcoming the current limitation of fixed scanning geometries, by extending them to any possible spatial shape with the support of a 6-axis robotic arm.
The project is built and validated incrementally through a series of MATLAB functions, utilizing the equivalence theorem as a NF to FF transformation method. Each stage builds upon the previous ones and increases in complexity. Validation stages begin by simulating infinitesimal dipoles and progress up to experimental validation of a tilted horn antenna. All the validation steps are successfully met, except for an unexpected phase symmetry. Our work sets a solid foundation for further development of this antenna measurement system. The system will significantly improve antenna characterization by enabling more flexible scanning grids.