- mmW Research Coordination Network: https://mmwrcn.ece.wisc.edu/
- Sage Millimeter-Wave: http://www.sagemillimeter.com/home
- Everything waveguide: https://www.everythingrf.com; waveguide sizes
- Reactel: https://reactel.com/
- MIWV: http://www.miwv.com/
- VDI: https://www.vadiodes.com/en/
- Microwave Dynamics: https://microwave-dynamics.com
- Fairview Microwave: https://www.fairviewmicrowave.com/