Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

73,
Glenn AC7ZN

wrote:

Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

I only know about an 'offline' ARRL modelling course
(http://www.arrl.org/catalog/?item=8721).
It's based on EZnec, NecWin+ and/or 'pure' Nec2 models. You can also
use 4nec2 to run the models. From my memory: mostly HF, some VHF/UHF
and no microwave.

Arie.

Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

I only know about an 'offline' ARRL modelling course
(http://www.arrl.org/catalog/?item=8721).
It's based on EZnec, NecWin+ and/or 'pure' Nec2 models. You can also
use 4nec2 to run the models. From my memory: mostly HF, some VHF/UHF
and no microwave.

Arie.

NEC does not have any specific frequency limit -- see FAQ
www.nittany-scientific.com
"What is the frequency limitation of NEC?

There is no limit on the frequency range although NEC is usually not used
for frequencies above 2 GHz.

NEC is dependent on the structure geometry not the frequency. If the
structure can be modeled following the NEC guidelines then the appropriate
frequency can be used."

If the ARRL "On-line" Antenna course (See Arie's link above) is anything
like Cebik's two books (Available at Nittany Scientific) then I would
strongly recommend it.

Frank

I noticed, I did not read the link I supplied well enough. There also
seems to be an online course. I presume it's based on the same book and
model-files.

Concerning the frequency-limit, I know there are a number of 2.4 ghz
wlan Nec2 models published on the internet and for myself I once
modeled a 11 ghz satellite dish using both surface patches and a
wire-grid. However I can not say very much about how well these models
agree with the real world counterparts.

Arie.

I've had many EZNEC users tell me they thought the course was very
worthwhile.

As others have mentioned, there's no upper frequency limit to NEC or its
derivative programs, but some of the geometries used at microwave
frequencies don't lend themselves well to NEC modeling. I've done
considerable modeling with EZNEC at 6 GHz and found the results to be
satisfactory.

Roy Lewallen, W7EL

If you are referring to EC-004, I took the course last fall.

I went into it knowing I was pretty antenna smart already. I deserved
the humbling experience. As with most endeavors, if you have a lot of
self discipline you could do fine just buying the book and some
modeling software. If I had not taken the course, I would not have
stayed on track. It was well worth the effort and the expense. The
course uses Nec-2 or EZNEC. I opted for EZNEC+ mainly because I was
able to try out the demo version. I have never regretted it and I have
not felt the need for NEC-2.

I feel it has saved me a lot of frustration in dealing with my own
antennas. It is not specific to any frequency or type of antennas. It
provides you with the information on how to evaluate plans without
having to suffer some mistakes. It also provides warnings about where
modeling fails. I think it is worth both the time and money.

de W8CCW John

On 16 May 2006 06:35:46 -0700, wrote:

Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

73,
Glenn AC7ZN
John Ferrell W8CCW

Dear Mr. Dixon (AC7ZN):

I took the course. What a bargain! Though antennas are one of my
areas, I found the course interesting. It also gave me first hand
experience with "distance learning." Many Universities will be increasing
their offerings using this scheme.

Unfortunately, the grammar and syntax of the presentations suggests that
the work has not been proofread. Professor C's work suffers now and again
from what must be transcription errors. A small number of the exam
questions have a wrong right-answer.

Even with a few warts, I recommend taking the course.

73, Mac N8TT
--
J. Mc Laughlin; Michigan U.S.A.
Home:
"Arie" wrote in message
ups.com...
wrote:

Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

I only know about an 'offline' ARRL modelling course
(http://www.arrl.org/catalog/?item=8721).
It's based on EZnec, NecWin+ and/or 'pure' Nec2 models. You can also
use 4nec2 to run the models. From my memory: mostly HF, some VHF/UHF
and no microwave.

Arie.

Glenn, and others- Have the text book for this course, and it costs
$39.95, + shipping (think $7.50), and it is fairly comprehensive,
several hundred pages (1 inch thick)!, and has 31 lessons, +
appendices, and the answers to the questions in the lessons.
It's ISBN # is 0-87259-872-1 . If you sign up for the course,
this manual is available, in .PDF format (have lots of ink and paper!)
as a download! Unfortunately, had other things come up, so didnt get to
even start the course, but from what in in the textbook, it is more than
worth the money! Well worth the money if you have EZNEC, or other
varieties of NEC. Wish had the ambition to try it again. Think it would
be better than most of the Leagues antenna books, for reference purposes!
Here is the Table of Contents:
# Familiarization with antenna modeling
# The language of modeling
# Setting up an antenna model
# Antenna model outputs
# Model sources
# Model grounds
# Frequency selection, sweeps and scaling
# Antenna loads
# Transmission lines
# Antenna model adequacy testing
# Workarounds for NEC-2 limitations
# Modeling by Equation
# Practical modeling
# Advanced and specialized modeling
....and more.

Hope this helps, Jim NN7K

wrote:
Has anyone taken this? Your impressions? Does it specifically cover
any microwave antenna modelling? I assume EZNEC is the software used,
or is it something else?

73,
Glenn AC7ZN

Thank you all for your input.
Glenn