Re: NEC-LIST: URBAN ANTENNAS

Hello Zvi.

I do not have my articles handy (still packed after retirement). However,
for an analogy have a look at troposcatter antennas where there is a similar
effect. The multipath loss increases a bit with antenna size and gain. it
should be possibe to simulate some of the results you are talking about, or
to measure some effects in practice at suitable locations if these are
indeed significant.

Best regards,
Duncan Baker.

"zvi frank" <zvi_f_at_mti-group.co.il> writes:
> Hi All,
> I recently received comments from various sources that flat panel
> array antennas are unsuitable for use in an urban environment. The reason
> given was that since these usually constitute a planar array of elements .
> In such a case multiple reflections could result in different phasing
> between the various elements and hence lowering og the resultant gain of
the
> structure.
> Is anyone familiar with this effect? How can one overcome this effect?
> what sort of elements would be suitable?
> Thanks in advance,
> Zvi
>
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