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Antenna recommendation needed
Bruno wrote:
On Sun, 18 Jan 2015 21:28:07 +0000, jimp wrote: Verticals; if you have a lot of area, phased vertical arrays. Aren't verticals more inclined to generate interference? No. BTW, my plot is 120' by 90' so I think an array at HF will be impossible. The feed point will be pretty much central to the plot, though. A 40M four square would be a push, but a 20M a slam dunk. DXEngineering has a lot of stuff and info for building various vertical arrays with phased feeding. The simplest array is 3 verticals about .23 lambda tall spaced at about ..34 lambda with just the center one fed. With the other two undrounded, you get a typical, omnidirectional vertical pattern. If you ground the outer two (think remote relays) you get a broadside pattern like a dipole with about 3.5 dBi gain. Of course your ground will make a difference and likely the more radials you can bury the better it will be unless you live in a swamp. Verticals want a good ground, horizontals want a better than .5 lambda height. -- Jim Pennino |
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