Antenna optimization
 

In message , JC
writes
Thanks for help, I think I wrongly explained my problem, here is the
question:
1/ I design an antenna, for instance a 3 el 20m beam.
2/ I enter into EZNEC wires dimensions, spacing, height, source.....
3/ EZNEC calculates gain, F/B, SWR....and results are acceptable.
4/ Now let's suppose my objectives are max F/B as I have a QRM source
opposed to my favourite transmitting direction and SWR 1.5 on a given
frequency range as my transceiver is very SWR sensitive and I can't use an
antenna tuner.
I accept changing wire lengths and spacing but not boom length.
Is there a way to have EZNEC, or another software, doing automatic
iterations until it reaches the best F/B-SWR compromise ?


MMANA does what you want and it's free.

http://mmhamsoft.amateur-radio.ca/ and I see there's a new release out.

Read this too. http://g7rau.demon.co.uk/sm5bsz/

Brian GM4DIJ
--
Brian Howie

Antenna optimization
 

I downloaded MMANA but I can't seem to unzip it. What program will
unzip it ? I have WinZip 7.0

Thanks
Ron WA0KDS


Brian Howie wrote:
In message , JC
writes

Thanks for help, I think I wrongly explained my problem, here is the
question:
1/ I design an antenna, for instance a 3 el 20m beam.
2/ I enter into EZNEC wires dimensions, spacing, height, source.....
3/ EZNEC calculates gain, F/B, SWR....and results are acceptable.
4/ Now let's suppose my objectives are max F/B as I have a QRM source
opposed to my favourite transmitting direction and SWR 1.5 on a given
frequency range as my transceiver is very SWR sensitive and I can't
use an
antenna tuner.
I accept changing wire lengths and spacing but not boom length.
Is there a way to have EZNEC, or another software, doing automatic
iterations until it reaches the best F/B-SWR compromise ?



MMANA does what you want and it's free.

http://mmhamsoft.amateur-radio.ca/ and I see there's a new release out.

Read this too. http://g7rau.demon.co.uk/sm5bsz/

Brian GM4DIJ

Antenna optimization
 

Ben AD7GD wrote:

On 2006-07-11, wrote:

Unfortunately K6STI no longer markets his software to hams (due to
software piracy issues). Hopefully you can find someone with a copy
who can optimize your initial results.

Careful, you're pegging my irony meter.

Why? The documentation says:

************************************************** **********************
This software is copyrighted. It has been provided to
you on the condition that you will not sell, rent, lend, give
away, or otherwise transfer the software to others.
************************************************** **********************

As I read it, there is no problem if I use it to optimize a model
for someone else. I'm NOT volunteering to do that however.

73, Bill W4ZV

Antenna optimization HELP
 

Ron wrote:

I downloaded MMANA but I can't seem to unzip it. What program will
unzip it ? I have WinZip 7.0

Thanks
Ron WA0KDS

Antenna optimization HELP
 

Ron wrote:

I downloaded MMANA but I can't seem to unzip it. What program will
unzip it ? I have WinZip 7.0

Thanks
Ron WA0KDS

Antenna optimization
 

FWIW, FilZip unzipped it fine: one file, MMANGAL_Setup.exe. It's
possible that the zip file became corrupted when you downloaded it,
too.

Cheers,
Tom

Ron wrote:
I downloaded MMANA but I can't seem to unzip it. What program will
unzip it ? I have WinZip 7.0

Thanks
Ron WA0KDS


Brian Howie wrote:
In message , JC
writes

Thanks for help, I think I wrongly explained my problem, here is the
question:
1/ I design an antenna, for instance a 3 el 20m beam.
2/ I enter into EZNEC wires dimensions, spacing, height, source.....
3/ EZNEC calculates gain, F/B, SWR....and results are acceptable.
4/ Now let's suppose my objectives are max F/B as I have a QRM source
opposed to my favourite transmitting direction and SWR 1.5 on a given
frequency range as my transceiver is very SWR sensitive and I can't
use an
antenna tuner.
I accept changing wire lengths and spacing but not boom length.
Is there a way to have EZNEC, or another software, doing automatic
iterations until it reaches the best F/B-SWR compromise ?



MMANA does what you want and it's free.

http://mmhamsoft.amateur-radio.ca/ and I see there's a new release out.

Read this too. http://g7rau.demon.co.uk/sm5bsz/

Brian GM4DIJ

Antenna optimization
 

Why on Earth anybody zips up software these days I can't imagine.

Antenna optimization
 

Reg Edwards wrote:
Why on Earth anybody zips up software these days I can't imagine.

I thought you'd have a better imagination than that, Reg.

o To reduce the size of the transferred file.
o To package a set of files together, e.g. documentation and sample
files along with a program, or a set of related programs.
o To secure it; it may not be very robust security but would
discourage
the casual user.

For the present example, though, the benefit is marginal at best.

Cheers,
Tom

Antenna optimization
 

Bob Bob wrote:
Yes!

I think EZNEC has a optimization function as you stated. I know 4NEC2
does as I have used it many times..

No, sorry, EZNEC doesn't have any optimization capability.

Roy Lewallen, W7EL

Antenna optimization
 

"JC" wrote in
:

Is there a software which can design an antenna (like EZNEC or similar
) then allows to automatically optimize its dimensions according to
given requirements: max gain, F/B, min swr... and accepted dimensional
parameters changes: boom length, spacing....
JC

http://mmhamsoft.amateur-radio.ca/fi...ANA-GAL-65.zip


--
Dave Oldridge+
ICQ 1800667