To a casual observer, &#x27;millimeter wave&#x27; frequencies seem like a poor choice. From what little I know about RF, bands in the millimeter wave spectrum are going to suffer from lots of signal loss just due to attenuation from air and humidity, and won&#x27;t have particularly great range or penetration capabilities.<p>That said, my knowledge of RF tech is limited to &#x27;enterprise&#x27; wifi concerns and amateur HAM radio, so I might be missing something here.