# Relation between EM frequency/Intensity and voltage/current in a Circuit

Let's say I have a circuit connected to an antenna which listens for a certain frequency range. The antenna would generate an electric current. For an electromagnetic wave we have two main properties- Frequency (or wavelength) and Intensity.
I would like to know what property of EM corresponds to power (electricity). What I mean by this is that does frequency corresponds to voltage (i.e. higher frequency would generate higher voltage) and intensity corresponds to current(i.e. higher intensity would generate higher current), Or the other way around?
The same question for generating EM waves- More voltage would produce higher frequency and more current would produce more intense EM waves or the other way around?
Or am I thinking about it in a wrong way? I guess a different way to ask it would be -in a circuit for detecting EM waves, How would I measure the frequency and how would I measure intensity of that wave? Or while generating EM waves, how would I control the frequency and how would I control the intensity of the wave?

• I think your mixing apples and oranges here. All action is current driven. All potential is based on voltage, but without current you have no 'action', or work being done, even as EM. – Sparky256 Jun 25 '16 at 0:46
• This is an extremely broad question, however the way you are thinking about frequency generation is not correct. Higher voltage does not correspond to higher frequency. RF/MW frequencies are generated using resonant structures, i.e., crystals or cavities, or at "lower" RF frequencies, L-C resonators. The voltage and current generated in an RF circuit depend on the system impedance, which for low enough frequencies is frequency independent, so for a given power level the amplitudes of the voltage/current waves can be determined based on the impedance. – Captainj2001 Jun 25 '16 at 0:48