- #1
Wannabeagenius
- 91
- 0
Hi All,
I'm currently wrestling with trying to understand the theory behind radiation from a dipole antenna. Little by little I'm putting the pieces together but I need verification regarding a conclusion that I have drawn although I have not read it.
An antenna has a near field and a far field. The near field is due to the fact that all practical antennas have reactive elements even at resonance which do not completely cancel out. The far field is due to resonance and in a perfect world with no reactance, the transmission line to an antenna at resonance would see only a pure resistor with no reactive components.
Am I correct so far? If so, is it fair to say that an ideal antenna operating at resonance with no reactive component would not have a near or inductive field?
In trying to tackle this issue, I am probably going to be asking further questions one at a time at they come up.
Thank you,
Bob
I'm currently wrestling with trying to understand the theory behind radiation from a dipole antenna. Little by little I'm putting the pieces together but I need verification regarding a conclusion that I have drawn although I have not read it.
An antenna has a near field and a far field. The near field is due to the fact that all practical antennas have reactive elements even at resonance which do not completely cancel out. The far field is due to resonance and in a perfect world with no reactance, the transmission line to an antenna at resonance would see only a pure resistor with no reactive components.
Am I correct so far? If so, is it fair to say that an ideal antenna operating at resonance with no reactive component would not have a near or inductive field?
In trying to tackle this issue, I am probably going to be asking further questions one at a time at they come up.
Thank you,
Bob