Get the true facts about different type of Citizen
Band / 11 Meter antennas!
I have been studying
dual polarity quad such as the Avanti PDL-II pictured above.
Stay tuned for my latest article on building the ultimate
dual polarity cubical quad!
Hello, this site is dedicated to bringing true information
about the different types of antennas you can use, buy and
build for Citizen Band Radio and 11 Meter DXing. From concept
to construction, I have set out to provide the most technically
correct information possible. It contains information from
antenna basics to advanced antenna theories such as the angle
of radiation. I believe that it is not necessary to have great
knowledge of electric fundamentals to understand how an antenna
works. I have included tons of figures so that you can see
what I am talking about! This site should be of interest to
all CB users and 11 meter DXers because the station antenna
provides the most improvement in station performance (even
more so than an amplifier) when it is built correctly.
I decided to do this after all the info I read at antenna
manufactures web sites. They all try to sell you their antenna.
On one site I read says top loaded mobile antennas are the
best, even better than base loaded. Then you read the web
site of a company that makes base load mobiles only to find
out base loaded are the best. Good thing is, I am not trying
to sell you an antenna. Most of these web pages (and ad's
in magazines) are done by the advertising department, not
by the antenna engineers. And those advertised gain numbers
are not regulated by any government agency! If you are looking
for quick answers, frequently asked questions, this is not
the place to start reading. I recommend reading it all, so
that you get all the important concepts. Another reason I
decided to this page is lack of good information on the web
about antennas in general. Everyone has a "resource" site
with a 1000 dead links to antennas manufacture pages....but
no one has any real content. So here is my attempt
at it! If there are any section that you would like to see
added, let me know.
This page has to be viewed at a resolution greater
than 800x600. I am sorry if you can not turn up the resolution
any higher than 800x600, but I had to make the figures big
enough to show detail clearly. You know your resolution is
too small if you have to scroll out to read the end of each
line in the sections (not this page, however).
The Yagi building page is up!
- Scott, 2 Sugar Delta 789
Update : August / 2013
The Website from Signal Engineering has been off the web
for quite some time , I have recently made contact with Scott,
the original author of the "Ultimate Guide to CB Antennas"
web page. He has given me permission to re post the information
contained in the old signal engineering web site. I have provided
an E-Mail address for questions or comments below , however
I can not answer any questions regarding Signal Engineering
as I have no information other than their site is no longer
available. I will be making minor changes to the site to bring
it up to date, like in the coax section, I will remove some
of the specifications on outdated coax that is no longer available
and replacing it with more modern coax like LMR-400 Etc. Again,
just minor changes to bring things up to date just a bit.
If you have questions, comments or wish to make a suggestion,
or if you would like to see something added to the site, please
send an email to. firstname.lastname@example.org
Where to start reading if you are not really familiar
with antenna basics such as radiation resistance, SWR,
antenna bandwidth and polarization. Even if you have
heard of these terms, read on to get a better understanding
of all the essential fundamental antenna subjects. Discussion
on the different type of antennas will use terminology
Information about coaxial cable. Wonder why changing
the your coax length changes the SWR of your antenna?
Subjects such as impedance and velocity factor will
Details the most common types of antennas used on
11 meters. Different types of omnidirectional and beams
are covered and explains which design most common commercial
CB antennas use. This is the section to read if you
do not want to build your own antenna but figure out
which commercial design best suites you. Make sure you
read the "Hybrid" section if you own a Moonraker (or
any beam with a quad reflector) for an important note.
Explains mobile antenna basics.
Four ways to improve your stations performance greatly.
- Co-Phase your antennas for 3db more gain
- Circular Polarize your dual polarity beam for solid
- Angle of Radiation, Match the height of your antenna
to the distance you are trying to communicate
- Really Ground that radio for improved receiver performance!
Build your own optimized DX antenna. Not for the faint of heart. Now includes
talk on (Cubical Quad)!
- 4 Element Cubical Quad
- 4 Element Yagi NEW!