Impedance of a half-wave dipole antenna

[berkeman]

Thread closed for Moderation...

 

[berkeman]

Words can have many meanings. If you want to play the word game, the opposite of active is also reactive.

No, we don't like to play word games. We try to use standard terminology as much as possible, especially when trying to help inexperienced folks learn new concepts that they are asking about.

And that's all because I accidentally said "active resistance" instead of "real resistance" R.

Yes, that was one source of the confusion. There were also others.

73 + j42 means it has an active resistance plus reactance. But this "active" resistance is not a DC resistance, right? We can't just measure 73 ohm with a multimeter since the circuit is open. What closes it then? Let's say the reactive part is zero. How do we measure 73 ohm? By measuring current and voltage? But what causes resistance and what kind of resistance is that since it is only measurable as a ratio of AC current to AC voltage but cannot be measured as a DC resistance?

In any case, I think we've addressed your questions from your Original Post, so I'll close this thread now. If you have more questions about how antennas work or about other topics, please do a forum search to see if you can find the answer to your questions, and if not feel free to start a new thread. It's always best to post links to the reading you have been doing when starting a new thread in the technical forums.

Thanks to all who contributed in this thread.