2 in person interviews. First one with the lab manager and the second with a different lab manager. First interview was about an hour long, and asked about my experience on the resume, projects, etc. Included some basic technical questions about RF and wireless technology. Nothing too hard if you have good basics. Review smith chart, basic RF terms, block diagram of RF front end. Overall good experience. Second interview was more of a personality check and chit chatting about different things including the job and the role offered.