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

[Johan H. Bodin]

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.
[...]