I haven't heard that radio majors need to learn linear algebra, but computer majors are inseparable, especially when it comes to three-dimensional graphics processing. The closest mathematical knowledge of radio is Fourier series. Calculus with high numbers is also very important, which is very helpful to thoroughly understand the relevant knowledge of signal, system and frequency transformation. Of course, I think you are not far from the important level of advanced mathematics. The higher the analog frequency, the more difficult it is to learn.

Now let you design an AM radio with discrete components. Can you work it out? Few people look up this topic, but I think it basically involves the module of analog electrical knowledge that we have learned (except microwave, which requires more level and mathematical knowledge).

So, I suggest you go through the basics first, and then make up the figures. This may only require elementary school knowledge (after all, we can only remember the conclusions drawn through complex operations).