Conclusion
Six-port technique at millimeter-wave band - Principles and applications

The six-port device is a promising alternative to conventional mixers thanks to its simple architecture, low power consumption, and ease of implementation in millimeter waves. It offers excellent performance in terms of RF input matching and isolation, as well as a high degree of amplitude and phase balance. These advantages make it an excellent candidate for several innovative wireless applications in the millimeter band.

It can be used as a demodulator. $I\text{/}Q$ direct conversion for high-speed wireless communications at 60 GHz, in accordance with the IEEE 802.15.4 wireless standard, or can also be used in high-resolution radar devices for measuring certain physical parameters such as speed and distance. In addition, thanks to its...