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COLLINEAR_915_MINI.NEC
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COLLINEAR_915_MINI.NEC
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CM AH=3 Antenna height in wavelength
CM S=0.0038 Adjust spacing when testing 0.0038
CM W=0.0028 Wire thickness 0.0028
CM A=0.2238 Center wire 0.2223 0.2238 with reflectors.
CM B=0.1047 Inner wires 0.1237 0.1047 with reflectors.
CM C=B Outer wires 0.1237
CM D=B End wires 0.1237
CM hr=0.0174 Ring radius 0.0149 0.174 with reflectors.
CM RWL=hr*2*3.1416 Ring wire length
CM da=A
CM db=A+S
CM dc=db+B
CM dd=dc+S
CM de=dd+C
CM df=de+S
CM dg=df+D
CM FP=25 Segment 22 Of 30 segments. 25 of 30 segments. This is very critical for good VSWR.
CM G=0.18 Reflector gap 0.18
CM RL=0.7 Reflector height 0.7
CM RT=0.10 Reflector thickness 0.10
CM
CM Helix 1 10 spacing spacing hr hr hr hr W
CM Copy/move 0 0 0 0 0 G 0 da 1
CM Helix 2 10 spacing spacing hr hr hr hr W
CM Copy/move 0 0 0 0 0 G 0 dc 2
CM Helix 3 10 spacing spacing hr hr hr hr W
CM Copy/move 0 0 0 0 0 G 0 de 3
CM Wire 5 30 G+hr 0 0 G+hr 0 da W
CM Wire 6 10 G+hr 0 db G+hr 0 dc W
CM Wire 7 10 G+hr 0 dd G+hr 0 de W
CM Wire 8 10 G+hr 0 df G+hr 0 dg W
CM Wire 10 30 G 0 0 G 0 da W
CM Mirror 100 0 0 1
CM Copy/move 500 3 0 0 90 -G*2 G*2 0
CM Wire 11 30 -G-G 0 0.05 -G-G 0 RH W*RT
CM Wire 13 30 -G-G 0 -0.05 -G-G 0 -RH W*RT
CM Wire 12 1 -G-G -W 0 -G-G W 0 W
CM Copy/move 0 0 0 0 0 G*2 0 AH
CM
CM
CM
CM Helix 1 10 S S hr hr hr hr W
CM Copy/move 0 0 0 0 0 0 0 da 1
CM Helix 2 10 S S hr hr hr hr W
CM Copy/move 0 0 0 0 0 0 0 dc 2
CM Helix 3 10 S S hr hr hr hr W
CM Copy/move 0 0 0 0 0 0 0 de 3
CM Wire 11 30 hr 0 0 hr 0 da W
CM Wire 12 41 hr 0 db hr 0 dc W
CM Wire 13 33 hr 0 dd hr 0 de W
CM Wire 14 30 hr 0 df hr 0 dg W
CM Wire 50 30 0 0 0 0 0 da W
CM Wire 51 30 -G 0 -RL -G 0 RL RT
CM Wire 52 30 hr -G -RL hr -G RL RT
CM Mirror 100 0 0 1
CM Copy/move 0 0 0 0 0 0 0 AH
CE
SY freq=915 'Resonant frequency.
SY AH=3 'Antenna height in wavelength
SY S=0.0038 'Adjust spacing when testing 0.0038
SY W=0.0028 'Wire thickness 0.0028
SY A=0.2238 'Center wire 0.2223 0.2238 with reflectors.
SY B=0.1047 'Inner wires 0.1237 0.1047 with reflectors.
SY C=B 'Outer wires 0.1237
SY D=B 'End wires 0.1237
SY hr=0.0174 'Ring radius 0.0149 0.174 with reflectors.
SY RWL=hr*2*3.1416 'Ring wire length
SY da=A
SY db=A+S
SY dc=db+B
SY dd=dc+S
SY de=dd+C
SY df=de+S
SY dg=df+D
SY FP=25 'Segment 22 Of 30 segments. 25 of 30 segments with reflectors. This is very critical for good VSWR.
SY G=0.18 'Reflector gap 0.18
SY RH=0.7 'Reflector height 0.7
SY RT=10 'Reflector thickness 10
GH 1 10 S S hr hr hr hr W
GM 0 0 0 0 0 0 0 da 1
GH 2 10 S S hr hr hr hr W
GM 0 0 0 0 0 0 0 dc 2
GH 3 10 S S hr hr hr hr W
GM 0 0 0 0 0 0 0 de 3
GW 11 30 hr 0 0 hr 0 da W
GW 12 41 hr 0 db hr 0 dc W
GW 13 33 hr 0 dd hr 0 de W
GW 14 30 hr 0 df hr 0 dg W
GW 50 30 0 0 0 0 0 da W
GW 51 30 -G 0 -RH -G 0 RH W*RT
GW 52 30 hr -G -RH hr -G RH W*RT
GX 100 001
GM 0 0 0 0 0 0 0 AH
GS 0 0 299.80/freq
GE 0
LD 5 0 0 0 58000000
GN -1
EK
EX 0 11 FP 0 1 0 0
FR 0 0 0 0 freq 0
EN