There is an aspect of mmwave that gets missed by a lot of tech watchers and some mobile operators. In low and mid band, repeaters are reviled because they creat

There is an aspect of mmwave that gets missed by a lot of tech watchers and some mobile operators. In low and mid band, repeaters are reviled because they create a lot of adjacent interference. In the mmwave band, due to the short wave length, array antennas are viable and hence, the beam widths are very narrow, antenna efficiency goes up with frequency. Repeaters do not generate interference because of the narrow beam widths. That means that low cost repeaters that require little or no power, no fiber can be used to extend the signal dramatically at a very low cost. This is the secret sauce that some carriers have figured out.