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CURTAIN_QAUD13_18DBI_5785.NEC
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CURTAIN_QAUD13_18DBI_5785.NEC
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CM CQ13r 13 element Curtain Quad with reflector from W1HBQ
CM Minor tweaks for 2.4Ghz by AE6KS
CM 4:1 balun required (Halfwave length coax cable). Gain of 18 dBi in front direction.
CM Change value on first line of symbols tab to scale model for any frequency.
CM ###########################################################################################
CM freq=915 Resonant frequency
CM W=7.987e-3 Wire Thickness
CM CW=0.029093 Center element wire thickness
CM l0=0.159417 Top and bottom horizontal elements in the center
CM l1=0.469677 l1 is the length of the elements next to the center column
CM l2=0.423522 l2 is the length of the outer elements
CM h=0.682936 h is the length of all vertical wires
CM y0 = .5 * l0
CM y1 = y0 + l1
CM y2 = y1 + l2
CM z0 = 0
CM z1 = h
CM z2 = z1 + h
CM z3 = z2 + h
CM Rx=2/2, Rnx=4 Reflector width / 2 , number of wires
CM Ry=3.7/2, Rny=20 Reflector height / 2 , number of wires
CM G=0.179869 Gap between reflector and elements
CM ###########################################################################################
CM P-multip Rnx*2 Rny*2 -G -Rx -Ry -G Rx -Ry -G Rx Ry Reflector
CM Wire 205 5 0 -y0 z0 0 y0 z0 CW Center horizontal
CM Wire 202 5 0 -y0 z2 0 y0 z2 CW Center top horizontal
CM Wire 210 5 0 -y0 -z2 0 y0 -z2 CW Center bottom horizontal
CM Wire 3 11 0 y1 z2 0 y2 z2 W Outer right top horizontal
CM Wire 4 11 0 y0 z1 0 y1 z1 W Inner right top horizontal
CM Wire 7 11 0 y1 z0 0 y2 z0 W Outer right middle horizontal
CM Wire 8 11 0 y0 -z1 0 y1 -z1 W Inner right bottom horizontal
CM Wire 11 11 0 y1 -z2 0 y2 -z2 W Outer right bottom horizontal
CM Wire 14 13 0 y0 z2 0 y0 z1 W Inner right top vertical
CM Wire 15 13 0 y0 z1 0 y0 z0 W Inner right middle top vertical
CM Wire 16 13 0 y0 z0 0 y0 -z1 W Inner right middle top vertical
CM Wire 17 13 0 y0 -z1 0 y0 -z2 W Inner right middle bottom vertical
CM Wire 20 13 0 y1 z2 0 y1 z1 W Outer right bottom vertical
CM Wire 21 13 0 y1 z1 0 y1 z0 W Outer right middle top vertical
CM Wire 22 13 0 y1 z0 0 y1 -z1 W Outer right middle bottom vertical
CM Wire 23 13 0 y1 -z1 0 y1 -z2 W Outer right bottom vertical
CM Wire 103 11 0 -y1 z2 0 -y2 z2 W Outer left top horizontal
CM Wire 104 11 0 -y0 z1 0 -y1 z1 W Inner left top horizontal
CM Wire 107 11 0 -y1 z0 0 -y2 z0 W Outer left middle horizontal
CM Wire 108 11 0 -y0 -z1 0 -y1 -z1 W Inner left bottom horizontal
CM Wire 111 11 0 -y1 -z2 0 -y2 -z2 W Outer left bottom horizontal
CM Wire 114 13 0 -y0 z2 0 -y0 z1 W Inner left top vertical
CM Wire 115 13 0 -y0 z1 0 -y0 z0 W Inner left middle top vertical
CM Wire 116 13 0 -y0 z0 0 -y0 -z1 W Inner left middle bottom vertical
CM Wire 117 13 0 -y0 -z1 0 -y0 -z2 W Inner left bottom vertical
CM Wire 120 13 0 -y1 z2 0 -y1 z1 W Outer left top vertical
CM Wire 121 13 0 -y1 z1 0 -y1 z0 W Outer left middle top vertical
CM Wire 122 13 0 -y1 z0 0 -y1 -z1 W Outer left middle bottom vertical
CM Wire 123 13 0 -y1 -z1 0 -y1 -z2 W Outer left bottom vertical
CM
CE
SY freq=5785 'Resonant frequency
SY W=0.004 'Wire Thickness 0.004
SY WH=0.02 'Horizontal wires thickness 0.02
SY RW=2.0 'Reflector Width 2.0
SY RH=3 'Reflector Height 3.0
SY Rx=RW/2, Rnx=4 'Reflector width / 2 , number of wires
SY Ry=RH/2, Rny=20 'Reflector height / 2 , number of wires
SY G=0.09 'Gap between reflector and elements 0.09
SY l0=0.212624 'Top and bottom horizontal elements in the center 0.2126
SY l1=0.328813 'l1 is the length of the elements next to the center column 0.3288
SY l2=0.418931 'l2 is the length of the outer elements 0.4189
SY h=0.707053 'h is the length of all vertical wires 0.7071
SY y0 = .5 * l0
SY y1 = y0 + l1
SY y2 = y1 + l2
SY z0 = 0
SY z1 = h
SY z2 = z1 + h
SY z3 = z2 + h
SM Rnx*2 Rny*2 -G -Rx -Ry -G Rx -Ry 'Reflector
SC 0 0 -G Rx Ry 'Reflector
GW 205 3 0 -y0 z0 0 y0 z0 WH 'Center horizontal
GW 202 3 0 -y0 z2 0 y0 z2 WH 'Center top horizontal
GW 210 3 0 -y0 -z2 0 y0 -z2 WH 'Center bottom horizontal
GW 3 11 0 y1 z2 0 y2 z2 W 'Outer right top horizontal
GW 4 11 0 y0 z1 0 y1 z1 WH 'Inner right top horizontal
GW 7 11 0 y1 z0 0 y2 z0 W 'Outer right middle horizontal
GW 8 11 0 y0 -z1 0 y1 -z1 WH 'Inner right bottom horizontal
GW 11 11 0 y1 -z2 0 y2 -z2 W 'Outer right bottom horizontal
GW 14 13 0 y0 z2 0 y0 z1 W 'Inner right top vertical
GW 15 13 0 y0 z1 0 y0 z0 W 'Inner right middle top vertical
GW 16 13 0 y0 z0 0 y0 -z1 W 'Inner right middle top vertical
GW 17 13 0 y0 -z1 0 y0 -z2 W 'Inner right middle bottom vertical
GW 20 13 0 y1 z2 0 y1 z1 W 'Outer right bottom vertical
GW 21 13 0 y1 z1 0 y1 z0 W 'Outer right middle top vertical
GW 22 13 0 y1 z0 0 y1 -z1 W 'Outer right middle bottom vertical
GW 23 13 0 y1 -z1 0 y1 -z2 W 'Outer right bottom vertical
GW 103 11 0 -y1 z2 0 -y2 z2 W 'Outer left top horizontal
GW 104 11 0 -y0 z1 0 -y1 z1 WH 'Inner left top horizontal
GW 107 11 0 -y1 z0 0 -y2 z0 W 'Outer left middle horizontal
GW 108 11 0 -y0 -z1 0 -y1 -z1 WH 'Inner left bottom horizontal
GW 111 11 0 -y1 -z2 0 -y2 -z2 W 'Outer left bottom horizontal
GW 114 13 0 -y0 z2 0 -y0 z1 W 'Inner left top vertical
GW 115 13 0 -y0 z1 0 -y0 z0 W 'Inner left middle top vertical
GW 116 13 0 -y0 z0 0 -y0 -z1 W 'Inner left middle bottom vertical
GW 117 13 0 -y0 -z1 0 -y0 -z2 W 'Inner left bottom vertical
GW 120 13 0 -y1 z2 0 -y1 z1 W 'Outer left top vertical
GW 121 13 0 -y1 z1 0 -y1 z0 W 'Outer left middle top vertical
GW 122 13 0 -y1 z0 0 -y1 -z1 W 'Outer left middle bottom vertical
GW 123 13 0 -y1 -z1 0 -y1 -z2 W 'Outer left bottom vertical
GS 0 0 299.8/freq
GE 0
LD 5 0 0 0 58000000
GN -1
EK
EX 0 205 2 0 1 0 0
FR 0 0 0 0 freq 0
EN