On 3/14/2020 4:07 PM, Jim Brown wrote:
Another good advantage to the electronic schemes is that you don't have
to go outside to rotate them when the noise that's bothering you is
coming from a different direction.
73, Jim
That is an interesting idea.
I have been trying to figure out how I could phase two verticals
so as to have a null(s) with steerable azimuth, but I'm stumped.
Using EZNEC modeling two 30 foot monopoles 70 feet apart, I can
drive them 180° out of phase and get a figure 8 pattern like
a broadside loop. I can drive them 135° out of phase and get
a cardioid pattern that doesn't have a sharp null, but rather
rejects everything off the back of the array. Other angles
produce variations on these patterns, but not a steerable
null.
I could imagine that an array of 3 or 4 or 6 antennas in a circle
might produce steerable nulls.
Am I missing something?
73
Rick N6RK
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