Timeline for For a resonant half wave dipole, is the phase of the applied RF voltage at the feedpoint in phase with the current reflected from the ends?
Current License: CC BY-SA 4.0
11 events
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| Aug 6, 2021 at 22:34 | comment | added | Andrew | Phil how about answering just one question in the interests of improving my answer - "Which parts of my answer are correct" ? | |
| Aug 6, 2021 at 22:32 | comment | added | Andrew | Thanks Mike i will take note of that, i forget the rules too, i just get frustrated because no has provided an answer to this question and i have the feeling it's because no one actually knows what the answer is so i just gave up and tried to answer it myself. I'm not giving up until i understand what causes the reactance in the impedance of a dipole !!!! : ) It's such a simple question yet no one can answer it. | |
| Aug 6, 2021 at 21:04 | comment | added | Mike Waters | A comment on an answer should be discussing how to improve the answer. Comments are ephemeral and for the purpose of improving the post they are commenting on, not for containing the information that post should have. The idea is to edit all additional facts into the question so that anyone coming to the page later does not need to read any of the comments — the “conversation in the comments” should be for working to create the question and answer in their best form, not for containing them. (Quoted from Kevin Reid AG6YO♦) | |
| Aug 6, 2021 at 21:01 | comment | added | Mike Waters | @Andrew, it might be good to review what comments are for. (I forget all the SE rules myself. :-) How about either moving some of your questions in these comments (1) to the question or (2) to a new question? If a new question, first search to see if it hasn't already been asked before. | |
| Aug 6, 2021 at 20:27 | comment | added | Phil Frost - W8II | @Andrew yeah, that's too many questions to tackle in the comments. | |
| Aug 6, 2021 at 12:07 | comment | added | Andrew | Sorry for all the questions. | |
| Aug 6, 2021 at 12:06 | comment | added | Andrew | Why does the standing wave on the dipole stop at the feed point ? There can only be one current at any point on the antenna at any one instant, is this the current of the standing wave or traveling wave ? How can an open circuit end reflect back the voltage and current such that they are not exactly 90 deg out of phase ? Do you think that the inductive and capacitive reactances cancel at resonance ? Is any part of my answer actually correct and if so which parts ? | |
| Aug 6, 2021 at 12:06 | comment | added | Andrew | An open cct transmission line has standing waves, are these different to those on a dipole ? If the length of the elements don't determine the reactance at the feed point, what does ? What voltage and current are in phase at resonance ? Why don't the traveling waves on the dipole go back down the transmission line ? | |
| Aug 6, 2021 at 12:06 | comment | added | Andrew | Hi Phil, thanks for your answer. Everyone that comments on this subject gives different conflicting ideas which is why i posted my answer. It's astonishingly difficult to find out the truth ! Tell me this, is the standing wave on a dipole the actual voltage potential on and current flowing through the antenna or is it the electric and magnetic field around the antenna ? If it's the fields around the antenna, then all the texts that say that a half wave dipole is the same of the last 1/4 wave of a transmission line are wrong. | |
| Aug 4, 2021 at 12:56 | history | edited | Phil Frost - W8II | CC BY-SA 4.0 |
added 1502 characters in body
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| Aug 3, 2021 at 2:30 | history | answered | Phil Frost - W8II | CC BY-SA 4.0 |