[Lowfer] Noise Canceler Effectiveness... How it REALLY works

[Bill Ashlock]

>>and the resulting pattern becomes 1+cos(x) which is a nice cardioid!
 
Excellent! Once again the totally mathematical proof rules the day.
 
Bill> Date: Wed, 14 Jan 2009 13:14:27 +0100> From: jh.bodin at telia.com> To: lowfer at mailman.qth.net> Subject: Re: [Lowfer] Noise Canceler Effectiveness... How it REALLY works> > Very true.> > The radiation pattern of a small loop is simply cos(x) where x is the angle with> respect to the plane of the loop. The phase is reversed when passing through the> null. Just add a properly phased signal from a circular pattern antenna with the> same sensitivity as the loop max (pattern = 1 in all directions) and the> resulting pattern becomes 1+cos(x) which is a nice cardioid! :-)> > 73> Johan SM6LKM> > ----> > Bill Ashlock wrote:> > > Gentlemen:> [...]> > the old trick of combining the figure "8" pattern from a loop> > antenna and the circular pattern from a long wire antenna to> > form a cardioid pattern.> [...]> _______________________________________________> >From the Lowfer mailing list> Send messages to: Lowfer at mailman.qth.net> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer
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