[MLB-WIRELESS] Omni antenna design question

Craig Mead craig at australianwireless.org
Thu Jul 24 08:39:59 EST 2003


>  Got another question for the RF gurus on the list about the home made
> antenna at: http://guerrilla.net/reference/antennas/2ghz_collinear_omni/
>
>  My question is related to the N Connector and length of its coax. In the
> "Decoupling and RF Connector Assembly:" section they say that they "we
> solder the braid of the coax to the end of the brass tubing 1/4 wavelength
> up from the end of the N connector"
>
>  My question is how important is having the N connector 1/4 wave length
from
> the brass tube bit? I didn't think it would be much of a big deal to have
> the connector a foot or two away on a longer bit of coax?

I'd be doing it 1/4 wavelength away and then adding an N Male -> Female
extension lead. Unsure of the precise implications, but usually when they
specify something its for a reason.

>  Also, I take it just adding elements (I'm guessing in lots of two) would
> increase the gain?

Double the elements, double the gain. IIRC.

> Regards,
> g at z.


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