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Old May 5th 07, 02:08 AM posted to rec.radio.amateur.antenna
Frank's Frank's is offline
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First recorded activity by RadioBanter: Dec 2006
Posts: 44
Default Gaussian cluster antenna array data


"Frank's" wrote in message
news:ZTP_h.4028$Vi6.2131@edtnps82...
Frank, I could not find anything that would have caused a problem.
I intend now to up the segment a lot and then reload the program and
start again
which will take some time.
Art


Hold everything Art. It seems I did not understand how your
coordinates were set up. Thanks to somebody who pointed
out my error -- now back to the drawing board!!

Frank


Code modified as shown below:

CM Gaussian Array
CE
GW 1 31 273.3 164.1 820 273.3 -164.1 820 0.65
GW 2 41 25.1 203.3 1079 25.1 -203.3 1079 0.65
GW 3 31 171.1 202.1 582 171.1 -202.1 582 0.65
GW 4 30 321.6 178.4 1036.5 321.6 -178.4 1036.5 0.65
GW 5 41 2.1 206.5 701.2 2.1 -206.5 701.2 0.65
GW 6 31 153.5 194.5 1038.1 153.5 -194.5 1038.1 0.65
GS 0 0 0.025400
GE 1 -1 0
GN 2 0 0 0 13.0000 0.0050
EX 0 6 16 0 1 0
FR 0 5 0 0 14.15 0.05
LD 5 0 0 0 3.08E7
RP 0 1 361 1000 79 0 1 1
EN

Results at 14.25 MHz:

Gain = +14.6 dB
F/B ration = 31.5 dB
TOA = 11 degrees
Zin = 27.0 + j 0.25

These results appear to agree with your findings.
The structure could be fine tuned by including the insulation
and element tapering. Also I have not fully balanced the
segmentation. The only question I have is
how does this compare with a conventional 6 element
yagi at the same nominal height of 85 ft.

Frank