parrot /export/home/drkirkby/yagiuda-1.18/src % optimise -o 19 -Z 12.5
example1 1000
Will optimise insisting all selected parameters improve.
Optimising for maximum possible gain.
Optimising for maximum possible FB ratio.
Optimising for an input SWR as low as possible
1 G= 9.65dBi,FB= 12.30dB,SL= 0.00dB,SWR= 5.18,Z=
42.42-j 29.86
8 G= 9.71dBi,FB= 16.25dB,SL= 0.00dB,SWR= 2.54,Z=
31.00-j 4.40
255 G= 9.88dBi,FB= 17.39dB,SL= 0.00dB,SWR= 1.87,Z= 23.06+j
2.39
260 G= 9.94dBi,FB= 17.44dB,SL= 0.00dB,SWR= 1.78,Z= 21.97-j
2.12
262 G= 9.96dBi,FB= 18.63dB,SL= 0.00dB,SWR= 1.62,Z= 18.32-j
4.55
274 G= 9.99dBi,FB= 20.22dB,SL= 0.00dB,SWR= 1.30,Z= 16.25-j
0.52
334 G=10.00dBi,FB= 20.87dB,SL= 0.00dB,SWR= 1.09,Z= 13.40+j
0.72
426 G=10.01dBi,FB= 23.06dB,SL= 0.00dB,SWR= 1.09,Z= 11.62-j
0.58
536 G=10.01dBi,FB= 23.11dB,SL= 0.00dB,SWR= 1.08,Z= 11.56-j
0.07
588 G=10.01dBi,FB= 23.12dB,SL= 0.00dB,SWR= 1.06,Z= 11.87-j
0.24
591 G=10.02dBi,FB= 23.25dB,SL= 0.00dB,SWR= 1.06,Z= 11.85+j
0.17
613 G=10.02dBi,FB= 23.38dB,SL= 0.00dB,SWR= 1.04,Z= 12.14+j
0.23
627 G=10.02dBi,FB= 23.55dB,SL= 0.00dB,SWR= 1.02,Z= 12.40+j
0.24
707 G=10.03dBi,FB= 23.66dB,SL= 0.00dB,SWR= 1.02,Z= 12.44-j
0.19
715 G=10.03dBi,FB= 23.73dB,SL= 0.00dB,SWR= 1.00,Z= 12.44+j
0.01
757 G=10.03dBi,FB= 23.74dB,SL= 0.00dB,SWR= 1.00,Z= 12.48-j
0.02
810 G=10.03dBi,FB= 23.78dB,SL= 0.00dB,SWR= 1.00,Z= 12.52-j
0.02
872 G=10.03dBi,FB= 23.79dB,SL= 0.00dB,SWR= 1.00,Z= 12.52+j
0.01
The best design is in a file "example1.bes". You should check it
thoroughly
and if its better than example1, copy example1.bes to example1
For your inforation, the original data on the antenna was:
Start data:G= 9.65dBi,FB= 12.30dB,SL= 0.00dB,SWR= 5.18
Final data:G=10.03dBi,FB= 23.79dB,SL= 0.00dB,SWR= 1.00
Changes: G= 0.38dBi,FB= 11.49dB,SL= 0.00dB,SWR=-4.17
parrot /export/home/drkirkby/yagiuda-1.18/src %
As you can see, the gain went up, so did the F/B and the VSWR went
down.