[MLB-WIRELESS] Setup questions

[Michael Borthwick]

On 29/03/2009, at 10:22 AM, <mw at freenet.net.au> wrote:

> Hi All,
>
>> I've noticed in "real world" settings with lowish antennas that
>> omnidirectional antennas seem to perform poorly, compared to
>> directional antennas with the same gain specification.  For example,
>> I've consistently had worse results with (say) a 9dB omni, versus a
>> 9dB directional antenna over the same path.  Not sure if this is due
>
> That would be due to the additional noise picked up by an omni  
> antenna.  An
> omni hears noise from all directions

and worse still - most of the noise is vertically polarised - hence  
the preference for horizontal polarisation in both omni and  
directional links.