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radiation pattern of yagi uda antenna is omnidirectional?

pebe

Sep 3, 2013
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No, a Yagi antenna is directional. The more the directors, the narrower the angle of acceptance.
 

Calmore

Jan 19, 2015
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If it's mounted vertically, in an X-Y sense you'd get a sort of omnidirectional pattern. Not very sensitive I agree.
 

pebe

Sep 3, 2013
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Not sure what you mean by 'X-Y' sense, but horizontal or vertically mounted it will still be highly directional.

the only thing that that will give you an Omni directional pattern is a vertical whip or a vertical dipole
 
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davenn

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Sep 5, 2009
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If it's mounted vertically, in an X-Y sense you'd get a sort of omnidirectional pattern. Not very sensitive I agree.

no, its still a directional array

The only thing that will give you an Omni directional pattern will be a vertical whip or dipole
 

Gryd3

Jun 25, 2014
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If it's mounted vertically, in an X-Y sense you'd get a sort of omnidirectional pattern. Not very sensitive I agree.
You are looking at the radiated pattern in a single 2-Dimensional plane.
Even then.. the pattern radiated in any 2-Dimensional axis is not omnidirectional, It has very distinct lobes in any combination of the X, Y, and Z, Axis. (Unless you take a cross section of one of the lobes a few feet away from the antenna... but this would be like calling a Satellite dish omnidirectional because it's radiated pattern a few feet away is 'round')

Take a look on google for some 3-Dimensional representations of the radiation pattern from a yagi uda antenna.
 

Calmore

Jan 19, 2015
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Yeah, it was intended as a humorous reply based on the above posts. See the winky face?

Yes, the horizontal radiation pattern of a vertically mounted yagi would be sort of peanut shaped.
 
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