Timeline for Does antenna array structure effect overall radiation resistance?
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 30, 2020 at 10:15 | vote | accept | Aparna B | ||
| Jun 30, 2016 at 17:13 | answer | added | Phil Frost - W8II | timeline score: 2 | |
| Jun 29, 2016 at 7:54 | comment | added | Edwin van Mierlo | @Hamsterdave : "Perhaps he is just attempting to understand an element of antenna theory that is eluding him" -- in that case the question could [should] be reworded. Something like "Would someone be able to explain why [this] and [that] while [such] is influencing [the other]" | |
| Jun 29, 2016 at 7:46 | comment | added | Edwin van Mierlo | I removed my original comment. However, if a question like "does [this] depend on [that] and [such]?" is a good question for this forum, then the correct answer is "Yes", and such answer is 100% correct, as the question is boolean to begin with. | |
| Jun 28, 2016 at 23:42 | comment | added | Kevin Reid AG6YO♦ | Antenna theory, antenna design, and RF electronics are on-topic here. | |
| Jun 28, 2016 at 19:19 | comment | added | K7PEH | @Hamsterdave Thinking that this is an amateur radio forum and not a electrical engineering (or, RF engineering) forum, I submit that such questions on antenna theory might get better response somewhere else. Indeed, there have been a number of antenna theory questions that have shown up on the Physics.SE forum that would not be best on this forum mainly due to the focus being more on the mathematical analysis rather than the usefulness of an antenna for this hobby of ham radio. | |
| Jun 28, 2016 at 18:39 | comment | added | Hamsterdave | @K7PEH, I'm sure your credentials are impressive. That said, there is no basis in the post for the assumption that you and Edwin Van Mierlo made that OP was seeking specific practical advice, nor is there any requirement that questions here be worded as such. Perhaps he is just attempting to understand an element of antenna theory that is eluding him, in which case, his question is perfectly reasonable and sufficiently concise. | |
| Jun 28, 2016 at 18:29 | comment | added | K7PEH | @Hamsterdave -- I am very well aware of the what and why of Radiation Resistance. I have been designing and analyzing antennas for many years as a result of my other hobby of mathematical physics combined with my hobby of ham radio. Actually, the more important factors, since they are the controllable ones in antenna design, are all the loss resistance values that you rightly included in your posted answer. If the poster had asked how to minimize losses in his array design, I think that would have been a more useful type of question. | |
| Jun 28, 2016 at 18:15 | comment | added | Hamsterdave | @K7PEH, radiation resistance is a theoretical construct that simplifies the calculation or measurement of other characteristics. While you may not see it calculated or measured in the real world often, you see it indirectly almost any time antenna performance is discussed, as a component of radiation efficiency. Radiation Efficiency = Radiation Resistance / Total Antenna Impedance | |
| Jun 28, 2016 at 17:37 | comment | added | K7PEH | As far as I know, the whole point of designing or building an antenna array is to achieve some desired directivity. Antenna arrays are often forced upon AM commercial stations as part of their license. This is because the station may be licensed to broadcast only to regions South West (for example) so the antenna array is designed to maximize gain in that direction and minimize in other directions (i.e. Directivity). | |
| Jun 28, 2016 at 17:31 | comment | added | K7PEH | My curiosity is why the OP cares about Radiation Resistance. It is rarely an important parameter of an antenna. The only time I have made use of Radiation Resistance is to compare various mobile HF antennas (e.g. Hi-Q versus Tarheel ) where the antenna is a compromise to begin with so efficiency is important and efficiency is where Radiation Resistance comes into play. Also, measuring radiation resistance is not something that amateur radio operators usually do (I don't mean calculating, I mean measuring). | |
| Jun 28, 2016 at 16:12 | answer | added | Hamsterdave | timeline score: 3 | |
| Jun 28, 2016 at 15:06 | comment | added | Hamsterdave | I disagree. The question is broad, but the desired answer is also broad. He is not asking for a specific scenario or numbers, only how element interaction impacts radiation resistance. | |
| Jun 28, 2016 at 10:34 | review | Close votes | |||
| Jul 2, 2016 at 2:50 | |||||
| Jun 28, 2016 at 10:11 | review | Low quality posts | |||
| Jun 28, 2016 at 17:08 | |||||
| Jun 28, 2016 at 6:29 | comment | added | Aparna B | @EdwinvanMierlo - does radiation resistance increase by array factor times? | |
| Jun 27, 2016 at 7:34 | history | asked | Aparna B | CC BY-SA 3.0 |