Timeline for How to Feed 2 x Co-Phased 4 Element Yagi Antennas?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 1, 2022 at 9:24 | vote | accept | Andrew | ||
| Apr 1, 2022 at 5:24 | answer | added | tomnexus | timeline score: 2 | |
| Mar 31, 2022 at 23:41 | comment | added | Andrew | @WirelessLearning It's pretty simple, 2 x yagi antennas with gamma matches wired in parallel, a schematic isn't really required. | |
| Mar 31, 2022 at 23:37 | comment | added | Andrew | @jvd A coaxial transformer has the disadvantage that it only works properly at one frequency and has a narrow bandwidth, and so limits the bandwidth of the entire system, the yagis i am using are designed to be wide band and cover about 2 MHZ, a toroidal transformer is somewhat frequency independent and much better, but thanks for the comment ! | |
| Mar 31, 2022 at 23:35 | comment | added | Andrew | @hotpaw2 I was thinking about that, a 1:1:1 balun, do you have a drawing of this ? also will that give 25 ohms to 50 ohms impedance transformation ? | |
| Mar 31, 2022 at 20:03 | comment | added | user21417 | The usual advice for co-phased stacks is to use $\lambda4$ lengths of 75$\Omega$ line to act as transformer sections that tee into the 50$\Omega$ feedline. I guess this interferes with gamma matching, which is why not an answer. | |
| Mar 31, 2022 at 17:31 | comment | added | hotpaw2 | How about a 1:1:1 balun? (3 windings on one toroid) | |
| Mar 31, 2022 at 12:13 | comment | added | Wireless Learning | A little schematic of the desired architecture would be greatly appreciated! | |
| Mar 31, 2022 at 9:28 | history | edited | Andrew | CC BY-SA 4.0 |
edited title
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| Mar 31, 2022 at 8:58 | history | edited | Andrew | CC BY-SA 4.0 |
added 203 characters in body
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| Mar 31, 2022 at 8:49 | history | asked | Andrew | CC BY-SA 4.0 |