Hey,

Congratulations on your admission. Let me tell you,hardware and core branches very good choices if you want to stay connected to hardware. The placements at IIT Kharagpur are quite good.  All you need to do is maintain you GPAs and do some projects and grab best internships. They will make you ready for further job opportunities.

If we talk about placements, almost all the Electronics Engineering students get places in reputed companies across India as well as abroad.

If you're in RF then most probably you'll be placed in one of the best semiconductor companies of India like Intel, Qualcomm, ST Microelectronics, Samsung Semiconductor etc. Other companies that recruit are General Electric, Siemens , Boeing etc. If you've secured an admission in this branch than be sure that you'll get one of the best jobs in the country. However, chances of getting a core RF job is less but not nil compared to other IITs. You'll get opportunities in rf domain from companies like Texas Instruments, Qualcomm, Siemens etc. Package wise the average ctc will be around 13–15 lac. Though most of the candidate will have a ctc greater than 15 lac.

I hope this helps.