This page explores antennas and their interaction with radiation, focusing on aperture antennas and their diffraction patterns. It covers the derivation of radiated fields, the Fraunhofer approximatio...This page explores antennas and their interaction with radiation, focusing on aperture antennas and their diffraction patterns. It covers the derivation of radiated fields, the Fraunhofer approximation for far-field analysis, and the relationship between aperture illumination, gain, and angular resolution.