Current induction into an antenna?

[Jay_Gridley]

I am researching radios in physics, and i need to find out what current is induced into a wire depending on its power, i don't know the units for the power of the radio wave.

can someone help me out? thanks.

 

[berkeman]

I'm a little fuzzy on what you're asking. You can calculate the receive voltage on the antenna terminals based on the field strength of the incoming electromagnetic signal, for various antenna configurations and so on. Like for an ideal dipole or monopole antenna at resonance, you can express the output terminal voltage as a function of the Electric field strength of the incoming EM (in units of Volts/meter). You can convert the electric field strength to a power if you want (in watts), to go from incoming power to the output terminal voltage of the antenna. Is this what you are trying to do, or are you looking at more basic stuff? Is this for high school physics (mostly just forumulas) or for college physics (so you have a background in Maxwell's equations, etc.)?

 

[kyle8921]

Hello,

I can provide some insight into your question about current induction into an antenna. Current induction is the process by which an electromagnetic field, such as a radio wave, creates an electric current in a conductor, such as a wire. The amount of current induced in a wire depends on the power of the radio wave and the properties of the wire, such as its length and thickness.

The unit for power of a radio wave is typically measured in watts (W), which is a unit of power equal to one joule per second. This unit is commonly used to measure the amount of energy transferred per unit time by an electromagnetic field.

To determine the amount of current induced in a wire, you can use the equation I = P/V, where I is the current in amperes (A), P is the power in watts, and V is the voltage in volts (V). The voltage is determined by the properties of the wire and its surroundings, as well as the frequency of the radio wave.

I hope this helps with your research into radios and current induction. Best of luck with your studies!

Sincerely,