[amsat-bb] Re: Gain VS Bandwidth at 2.4GHZ

Gordon JC Pearce gordonjcp at gjcp.net
Sun May 17 11:48:57 PDT 2009

Roger Kolakowski wrote:
> Not that they were optimum tuned for the 2.5 GHz frequency but what polarity
> were the "Pringles Can" washer antennas that were so popular for
> Net-Stumbling a few years ago?

Theoretically linear, but they should be considered to be a quarter wave 
vertical with some crap lying around in the nearfield.  They don't have 
any gain, and they certainly don't work as yagis - in fact, they work 
better sideways!

The can needs to be made of metal, and about 85mm in diameter.  That 
will give you a belter of a wifi antenna.  The threaded rod and washer 
idea is just stupid.  Leave that off.


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