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Mag loop polarity? also OK for NVIS?

Mar 10th 2017, 17:51


Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
I have a mag loop antenna that works 10-80 meters.
(1) Since the magnetic field is orthogonal to the electric field what is the polarity if I have it straitht up on the photo tripod using a ball head mount?
(2.) If I rotate the mag loop into the horizontal plane what is the polarity then?
(3.) Are mag loops any good for NVIS work?
Mar 13th 2017, 17:09


Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
If a vertical plane passes through the loop the antenna is horizontally polarized. This is useful for nulling out noise from a particular direction.
If it is in a horizontal plane it is vertically polarized.
Mag loops can be useful for NVIS, but the "poor" solar conditions can result in very short NVIS openings on 40 only during the middle of the day. A NVIS antenna is useless if the band isn't open.

Zack W1VT
ARRL Senior Lab Engineer

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