Magnetic Loop Antennas,.pdf

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Welcome to W2BRI's Magnetic
Loop Site
Magnetic Loop Antennas for HF & Above
Last Updated October, 18th 2003
New Review of the AOR ARD9800 Digital Voice Modem!
New!
W2BRI gets the digital voice bug. Aside from
my love of magnetic loops, I have been focusing
my attention towards a new mode of
communication for ham radio, digital voice.
Here is a link to my Digital Voice site.
My
new review
of the AOR ARD9800 Digital
Voice Modem is ready for your
reading
pleasure!
Site Menu
A. Magnetic Loop Antenna FAQ
In this section you will find theoretical and
practical information regarding mainstream
beliefs, practical observations, and down to
earth theory about these antennas. This
FAQ will answer many major questions.
B. My 80 Meter Magnetic Loop
Antenna
Find out about my largest magnetic loop for
40 and 80 meters. This page tells the story
about how I came to learn about magnetic
loops, and my experiences with this
wonderful antenna.
C. How to Build Your Own Magnetic
Loop Antenna
If you wish to build a Magnetic Loop
antenna and have questions about how to
make it work, this section is for you. This
Introduction
My current passion in radio has become
the Magnetic Loop Antenna, also referred
to as STLs, small transmitting loops. This site is
dedicated to these antennas, and I strive to make
this the most comprehesive site possible.
Magnetic Loops should not be confused with full
size resonant loops commonly found in many
radio operators backyards. The Magnetic Loop
antenna has some special properties which
distinguish it from many antenna designs like the
dipole.
A major advantage of the magnetic loop
is its high efficiency and small size. The
magnetic loop is typically smaller in
circumference than 1/4 wavelength of the
desired operating frequency. There are many
more advantages I plan on describing on this site
and some disadvantages. The antenna is ideal for
restricted operating areas and for portable
operation. They can work close to the
performance of a full size dipole antenna
(sometimes exceeding a dipole) and do not
require radials. They can be mounted low to the
ground, and will exhibit a high level of
performance. However, they tend to be very
expensive devices when bought commercially.
They can be homemade with relative ease, and
this site will teach you how to build your own if
you so choose.
five step project plan explains all the steps
to creating your own magnetic loop from
basic plumbing materials. The article
features step by step instructions and how-
to pictures to guide even the most basic
beginner in Magnetic Loop construction.
The article also features a section on
capacitors and loop tuning. It is a must
read.
D. Images and Notes from other Loop
Builders
You are not alone. There are many others
out there building and experimenting with
Magnetic Loops. This section features great
Loop antennas are elegant antenna systems, but articles and pictures of other loop builders
they are far from simple. The Magnetic Loop is a and their experiences. If you are serious
about what's going on out there in the world
complex antenna and will not simply work as a
of Magnetic loop, then this section is
plug and play solution. If one desires using the
essential. If you are interested in submitting
loop antenna effectively, a
an article, please send me an email at
decent understanding of the antenna's
characteristics are crucial. A Magnetic Loop can brian@standpipe.com
work very well for an operator if they
understand the different variables necessary to
E. All About Variable Capacitors
make it work well. My intention is to elucidate
many of these issues on this site and make it
Many of you have asked for this section and
easier for operators to use these antennas
here it is! Where to buy your vacuum
successfully. I also intend to discuss some of the variables, what to watch out for, and how to
myths related to loop construction, and hope to
use them. This section also covers air
clear up some possible misconceptions others
variables, sources to buy them, and
have encountered in with this interesting antenna. additional info. Enjoy.
My hope is to open up the technology to
more operators. I will welcome phone calls and
questions at 818-505-0222 or by email at
brian@standpipe.com, but perhaps you'll find
the answer to what your looking for on this site
and build it yourself!
F. Loop Software Page
In this section you'll find some very easy to
use loop modeling software. It's as easy as
pie to plug in your desired parameters and
see how well your antenna will perform
theoretically. There is also a very cool
homebrew capacitor design program.
Check it out!
I am always looking for original artciles,
images, and info on Magnetic Loops. Please
email me at:
brian@standpipe.com
if you would like to submit content for
the site.
Coming Soon
More Projects, A Motor Controller Page,
and More Articles from Other Loop
Builders
If you are interested in the topic of project
management, I write a monthly article which can
be found at
www.allaboutpojects.com
Please email me at brian@standpipe.com
Copyright 2002 Brian Levy

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