Ask the communication engineering seniors for help, and ask how to become a RF engineer or a test engineer.

1. Generally speaking, the school's curriculum arrangement is gradual, so freshmen are basic courses, sophomores should be professional basic courses, and juniors and seniors are professional courses. As for the key courses, I think it depends on which direction you want to develop after graduation. If you want to be a RF engineer or a test engineer, as you said, you have to study related communication courses, such as circuit foundation, electromagnetic field and electromagnetic wave, which are professional courses for these two positions. 2. The advanced research certificates of 2.AutoCAD and Pro/E are different from the positions you want to develop. These two certificates are related to software engineers. 3. RF engineers or evaluation engineers should all be related to communication. To become a qualified engineer in the above positions, you must have professional knowledge. For these two positions, you must learn professional courses well and have accumulated experience, so it's hard to say, but you must also be able to bear hardships. 4. If you want to develop into the above two positions, there is no authoritative certificate at present, but it is best to have internship experience in large companies or equipment manufacturers, such as Huawei and ZTE. If you want to work hard for these two positions, you don't need to enroll in any extracurricular classes, just learn the professional courses of these two positions well. As for which courses are related to these two positions, you can consult your teacher. Good luck!