Millimeter wave communication apparatus

A millimeter wave communication apparatus, comprising:

• an electronic device, comprising a first waveguide connection port and a millimeter wave communication module, wherein the first waveguide connection port is disposed on a casing of the electronic device, and the millimeter wave communication module is connected to the first waveguide connection port to transmit and receive millimeter-wave signals;
• and
• an expansion device, installed on a carrier, and comprising a second waveguide connection port and at least one millimeter-wave antenna, wherein the second waveguide connection port is disposed on a casing of the expansion device and corresponds to a position of the first waveguide connection port of the electronic device, and the at least one millimeter-wave antenna is connected to the second waveguide connection port to transmit and receive the millimeter-wave signals;
• wherein, when the electronic device is fastened on the expansion device, the first waveguide connection port and the second waveguide connection port form a waveguide to transmit and receive the millimeter-wave signals.