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Depends on several factors such as what gain your looking for and what polarity. http://martybugs.net/wireless/rubberducky.cgi. Is a nice look at the stock antenna that is intended to be vertically polarized (yes you can turn it on it side for horizontal but it's beamwidth may be only a few degrees. The biggest issue I see is lack of affordable test gear to properly test to be sure the setup has the right SWR let alone analyze the pattern. At 2.4ghz a centimeter measuring error has a huge effect on resonance. That said people have been making Pringles can directionals for years without measuring so your millage may vary. horizontal polarized omnidirectional ( yes they exist ) are made by slot type design by the research I've done or stacked phased elements. These also possibly could be the best for the ham band use because you gain 20-30db isolation from vertical devices by being cross polarized |
