Re: [IRCA] Phasing Null Depth and Antenna Distance

[Nick Hall-Patch <nhp@xxxxxxxx>]

Mark Connelly probably has more information on this topic, Aaron, but 
what sort of phasing device were you thinking of using, were you 
thinking of phasing dissimilar (e.g. whip vs. loop) or similar 
antennas, and were you looking to set up a system where the null is 
roughly the same over a broad range of frequencies?

LC type phasers can give quite a deep null over a narrow range 
of  frequencies, and with fairly closely spaced dissimilar antennas, 
as just described by Colin Newell.   I believe that getting a null 
over a broad range of frequencies using similar antennas and delay 
lines requires the 1/10 wavelength separation that you describe.

I hope that others can chime in on this topic.

best wishes,

Nick



At 00:01 15-10-15, you wrote:
> Is there any research/data on how null depth from phasing two 
> antennas varies based on the distance (in wavelengths) between the 
> two antennas?
>
> I'm asking because I've got a limited city lot and am also trying to 
> avoid local noise sources.  And I'm also curious as to what the answer is.
>
> I've heard 1/10th wavelength as a recommended minimum.
>
> Thanks!
>
> Aaron
> _______________________________________________
> IRCA mailing list
> IRCA@xxxxxxxxxxxxxxxx
> http://montreal.kotalampi.com/mailman/listinfo/irca
>
> Opinions expressed in messages on this mailing list are those of the 
> original contributors and do not necessarily reflect the opinion of 
> the IRCA, its editors, publishing staff, or officers
>
> For more information: http://www.ircaonline.org
>
> To Post a message: irca@xxxxxxxxxxxxxxxx


_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx