I found a 3.5 GHz sector antenna hidden away in a box when my research division moved offices. Naturally, I had to open it up and see what was inside! In this video, I unbox the antenna and then move ahead with a teardown of it. I show what it looks like under the hood, compare that with the datasheet, and I explain how the antenna actually works. We take a look at the internal dipole array, radiation patterns, antenna gain, and how this sector antenna differs from the latest antenna designs used in 5G systems.