The easiest and most commonly used to produce microwave radiation, is one who is to pass through the high frequency currents. It was the method used by Hertz in his famous experiments and the method is still used today in all transmitters.
In the minds of many technicians, radiation and high frequency power became synonymous. However, this view is not permissible and the thing seems obvious to some one wants to think it over.
The current high frequency radiation is no longer a current phone is a sound vibration. To move from one state to another, you must use a power transformer which is in the first case, a radiator or wave transmitting antenna, and in the second case, a loudspeaker.
An electrical circuit may be the site of a current high-frequency intense without any trace of radiation. It is therefore interesting to try to understand how we can move from a current high-frequency energy radiated.