Timeline for Antenna testing, minimizing feed-line radiation?
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 6, 2019 at 21:11 | answer | added | hotpaw2 | timeline score: 0 | |
| Aug 28, 2019 at 1:39 | answer | added | JSH | timeline score: 1 | |
| Aug 16, 2019 at 12:00 | history | tweeted | twitter.com/StackHam/status/1162333290482864129 | ||
| Aug 15, 2019 at 21:21 | history | edited | hotpaw2 | CC BY-SA 4.0 |
added 10 characters in body
|
| Aug 15, 2019 at 19:53 | comment | added | hotpaw2 | Re:gutters: Portions of all antenna’s are parasitic radiators (e.g. the infinitesimal segments all interact according to typical modeling). Including reflectors, directors, designed or accidental. | |
| Aug 15, 2019 at 19:48 | comment | added | hotpaw2 | Antenna’s aren’t human, and thus can’t make claims. But reviews posted on random amateur radio forum often claim this about very small (compared to wavelength) antenna’s. How to evaluate those claims? | |
| Aug 15, 2019 at 19:00 | comment | added | Phil Frost - W8II | And can't you trivially determine the radiation is coming from the antenna and not your gutters because your gutters aren't connected to a transmitter? Sure, they may parasitically interact with the antenna, but the radiation isn't "coming from" them. | |
| Aug 15, 2019 at 18:55 | comment | added | Phil Frost - W8II | What kind of antenna are you testing that claims to be a dummy load?! | |
| Aug 15, 2019 at 17:50 | comment | added | tomnexus | Is the antenna under test a groundplane antenna, or something that should be balanced, or a terrible inbetweener like an end-fed vertical or off-centre-fed dipole? And are you interested only in impedance, or in radiation patterns? If you're mentioning an anechoic chamber, are you thinking of UHF and above, or is it for HF? | |
| Aug 15, 2019 at 17:36 | answer | added | Mike Waters | timeline score: 2 | |
| Aug 15, 2019 at 17:12 | comment | added | MagnusO_O | Sidenote: Even in an anechoic chamber you also have to take care (shield) of the disturbance from all elements that you don't want to impact the measurement, like cables and so on. But there you usually have spare shielding material and a false bottom that makes it easier. - Just mentioned so that no one misunderstands the introduction of your question. | |
| Aug 15, 2019 at 16:50 | history | edited | hotpaw2 | CC BY-SA 4.0 |
added 16 characters in body
|
| Aug 15, 2019 at 16:43 | comment | added | hotpaw2 | This could be used for testing lightbulbs, and comparing against other expensive commercial small HF antennas that are claimed to be no more than imperfect dummy loads, such as a lightbulb. | |
| Aug 15, 2019 at 16:41 | history | asked | hotpaw2 | CC BY-SA 4.0 |