- Above 2 GHz cables cannot be used for RF signals because of losses
- Waveguides are conducting tubes (circular or rectangular) through which electromagnetic waves of ultra high frequency are transmitted
- Waveguides confine the energy fields inside them and the signals are propagated by reflection against the inner walls
- Typical outside dimensions of waveguide for use at 10 GHz would be 25.4 x 12.7mm
Warning: never look into an active waveguide