Google Hardware Engineer interview questions

After being contacted by a recruiter, I had a phone interview that lasted a little bit more than 45 mins. I passed this stage and waiting for the onsite interview.

The recruiter contacted me for a position for a hardware engineer within the Maps program. Although I have done hardware development for years, I stepped out for a few into focusing onto Signal Integrity yet working closely with hardware group. Consequently, I may have been a bit rusty on some specifics, but overall I am fairly comfortable with the process in general. The first step was a phone screen which led to an on-site interview. Then silence for over two weeks. Suddenly the recruiter responded that they liked my Signal Integrity experience and would like to have me come in for another round to interview with their Signal Integrity engineers. Another two weeks or so later, I take more time off-work to come in for the second round that went as smoothly as an interview process possibly could. And then....and after two pings to the recruiter.......silence.... It all took well over 2 months. While I don't have a degree from a fancy school that they would like to see, I am an experienced and creative engineer who's had very unique experience set. And at the end I never heard from the team.