Timeline for Impedance of Yagi boom model in NEC
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 16, 2023 at 6:32 | vote | accept | butterflypea | ||
| Aug 14, 2023 at 6:42 | answer | added | tomnexus | timeline score: 3 | |
| Aug 14, 2023 at 3:24 | comment | added | butterflypea | Would you be able to provide any tips for a more realistic feed arrangement? Should I have 2 sources (one on each arm of the dipole) that are equal in magnitude and opposite in phase? When I tried this it removed the SWR peak > 100 in the 4th image. Having separate sources also would allow me to model an air gap between each dipole arm. | |
| Aug 13, 2023 at 23:18 | comment | added | hobbs - KC2G | A little bit of both? It doesn't look like you're modeling a realistic feed arrangement, so you shouldn't expect a realistic impedance/SWR. But also, requiring at least half of the DE to be insulated from the boom is common in real life. | |
| Aug 13, 2023 at 11:49 | history | edited | butterflypea | CC BY-SA 4.0 |
Clarity
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| Aug 13, 2023 at 11:37 | comment | added | butterflypea | Hi thanks! I added some more NEC parameters and a diagram - let me know if there's anything else that would be useful. | |
| Aug 13, 2023 at 11:36 | history | edited | butterflypea | CC BY-SA 4.0 |
Added more NEC information
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| Aug 13, 2023 at 6:06 | comment | added | tomnexus | Hello and welcome! You are correct, but NEC is tricky and sensitive. Please add some information about how you are feeding the yagi - which segment(s) are excited and how, and also the segmentation in general - how many segments in each element, in the boom, and the wire thickness. | |
| Aug 13, 2023 at 4:12 | history | asked | butterflypea | CC BY-SA 4.0 |