magnetic crossed-loop antenna
magnetic crossed-loop antenna
(OP)
what is a magnetic crossed-loop antenna and how does it work.
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magnetic crossed-loop antenna
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RE: magnetic crossed-loop antenna
The same principal applies with any pair of magnetic loops at right angles.
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RE: magnetic crossed-loop antenna
Thanks for the reply.
I am working at 100 Khz hence i cannot use E field antenna (size issues). Is it possible that I use two H field antennas placed at right angles and get a near omnidirectional radiation pattern.
How do I sum the outputs of these two antennas. I am thinking of using a combiner but would there be any phase problems.
Does an omnidirectional H field antenna exist.
RE: magnetic crossed-loop antenna
For a receive only antenna, a short whip connected to an amplifier having a very high input impedance (which tends to swamp out the Xc component), can achieve very useful gain. These are sold as Voltage Probe or Active Antennas and are readily available. I saw one on a European car which used the side mirror as the antenna, but most use whips.
http://www.qrp.pops.net/probe1.htm
ht
http://www.arrl.org/tis/info/pdf/0109031.pdf
http://www.wellbrook.uk.com/products.html
As for combining loop antennas, the simplest thing is an input transformer with two primary windings. Otherwise two preamps having the same gain and combined same as you would do a mic mixer. Phase is not an issue unless your application has some special need.
RE: magnetic crossed-loop antenna
thanks
RE: magnetic crossed-loop antenna
are fed 90 deg. out of phase to generate rotating field
pattern in the plane of both antennas.
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RE: magnetic crossed-loop antenna
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