Summary: Does the AT-UHD-SW-510W Require an Antenna for Miracast over Infrastructure?—
The SW-510W requires an antenna for all Miracast modes.
Even in infrastructure mode, the SW-510W requires one antenna to be plugged into the Miracast USB port. In infrastructure mode, the wireless information broadcast by this antenna is used by your devices to discover the SW-510W. However, streaming content will be sent over the infrastructure connection.
Article ID: KB01629