A student from other department can include a Minor in AE in his/her existing programme. A Minor can be completed within the time and credits required for a student's regular 4-year Bachelors’ programme
For further details regarding eligibility, application process, seat availability etc… for the Minor programme refer to the UG manual https://www.iitk.ac.in/doaa/data/UG-Manual.pdf
For the course credit requirement to earn a Minor in AE refer to the course template https://www.iitk.ac.in/doaa/data/Course-Template-B.Tech-BS.pdf