G/T Simulations by VE7BQH, Issue 53, 17.06.2006
G/T is an important figure-of-merit for the antenna's overall receive performance, because it balances forward gain (G) against received thermal noise (T).
Here you will
find information on how antennas behave when stacked. The antennas
found in the table are the ones currenly used by people on EME. For an
antenna to qualify for a place in the table it must have been built by
someone, antennas that only live as computer files are not accepted.
Formula to
figure boom length in feet.. 6.83 X WL Gets you very
close. W1JR 8 MOD is 6.83 X 1.80 = 12.29 ft
... from N0PB
TYPE OF
L GAIN
E H
Ga Tlos
Ta G/T
ANTENNA (WL)
(dBd) (M) (M)
(dBd) (K) (K)
W1JR 8 MOD 1.80
11.17 3.09 2.76
17.15 3.04 266.57 -4.96
DJ9BV 1.8 1.81 11.38
3.16 2.80 17.31
3.16 267.12 -4.81
BQH8B 1.88
11.66 3.29 2.98
17.67 4.96 263.60 -4.39
I0JXX 8 2.04
12.16 3.46 3.17
18.18 11.33 267.91 -3.95
DK7ZB 8
2.09 12.15 3.41
3.12 18.08 4.34
260.41 -3.93
M2 9
2.12 12.08 3.34
3.04 18.08 8.77
254.38 -3.83
DJ9BV 2.1 2.14 11.92
3.33 3.04 17.92
4.66 260.72 -4.10
*OZ5HF 9 2.16
11.75 2.70 2.50
17.21 2.95 264.46 -4.87
OZ5HF 9 2.16
11.75 3.25 2.96
17.71 2.99 262.13 -4.33
YU7EF 9 2.16
11.86 3.18 2.87
17.79 3.23 243.83 -3.94
F9FT 11 2.17
11.71 3.27 2.97
17.70 5.21 262.64 -4.35
*CC 13B2 2.17
11.83 2.90 2.79
17.67 4.40 256.63 -4.28
CC 13B2 2.17
11.83 3.33 3.04
17.83 4.46 263.15 -4.23
*CC 215WB 2.19 11.86
3.05 3.05 17.80
4.34 286.14 -4.62
CC 215WB 2.19
11.86 3.48 3.19
17.87 4.40 287.83 -4.58
RA3AQ-9 2.35
12.34 3.40 3.11
18.30 4.45 238.76 -3.33
#RA3AQ-9 2.35
12.34 3.26 3.26
18.37 4.44 240.91 -3.30
Eagle 10 2.38
12.28 3.44 3.15
18.29 6.07 249.46 -3.54
DK7ZB
9 2.39 12.49
3.62 3.35 18.53
4.93 262.30 -3.51
*Flexa 224 2.49 11.90
3.50 3.30 18.01
8.29 264.66 -4.07
Flexa 224 2.48 11.90
3.30 3.31 17.87
8.32 257.77 -4.10
K5GW 10 2.49
12.57 3.45 3.16
18.53 5.72 241.20 -3.15
#K5GW 10 2.49
12.57 3.30 3.30
18.58 5.76 242.35 -3.12
K1FO 12 2.53
12.49 3.46 3.18
18.44 3.51 245.43 -3.31
YU7EF 10 2.54
12.53 3.43 3.14
18.49 3.14 237.12 -3.11
I0JXX 12 2.68
12.69 3.59 3.32
18.68 4.45 247.49 -3.11
BQH 12J 2.80
12.82 3.66 3.40
18.85 3.09 252.88 -3.03
#BQH 12J 2.80
12.82 3.53 3.53
18.88 3.06 252.93 -3.06
*M2 12 2.84
12.79 3.05 3.05
18.59 5.19 237.40 -3.02
M2 12 2.84
12.79 3.48 3.21
18.71 5.15 237.98 -2.91
BQH 10 2.86
13.07 3.70 3.44
19.05 6.59 240.48 -2.62
#BQH 10 2.86
13.07 3.57 3.57
19.11 6.56 242.58 -2.59
DK7ZB
10 2.87 13.19
3.89 3.65 19.20
5.94 259.91 -2.80
WB9UWA 12 2.90
12.82 3.45 3.17
18.73 6.93 227.71 -2.70
BQH 13 2.92
13.09 3.69 3.44
19.07 3.92 241.77 -2.62
#BQH 13 2.92
13.09 3.57 3.57
19.11 3.95 243.09 -2.60
*M2 20 XPOL 2.97 13.19
3.65 3.65 19.20
6.74 252.79 -2.68
#M2 20 XPOL 2.97 13.19
3.65 3.65 19.20
6.74 252.79 -2.68
M2 20 XPOL 2.97 13.19
3.77 3.52 19.16
6.77 251.00 -2.69
*BVO-3WL 3.00
13.50 3.90 3.70
19.48 5.35 264.59 -2.60
BVO-3WL 3.00
13.50 4.01 3.77
19.49 5.38 266.39 -2.62
#BVO-3WL 3.00
13.50 3.89 3.89
19.52 5.45 265.97 -2.58
YU7EF 11 3.04
13.07 3.56 3.30
18.99 3.32 226.79 -2.42
*CD15LQD 3.11
12.87 4.00 3.80
18.96 4.57 261.85 -3.08
CD15LQD 3.11
12.87 3.68 3.42
18.86 4.49 259.53 -3.14
CD15LQD MOD 3.11 13.24
3.83 3.58 19.24
3.73 253.86 -2.66
MBI FT17 3.12
13.34 3.84 3.59
19.31 6.02 246.36 -2.46
*CC3219 3.14
12.66 4.27 3.66
18.64 4.62 349.69 -4.65
CC3219 3.14
12.66 4.05 3.80
18.65 4.65 354.61 -4.70
CC3219 MOD 3.14 13.32
3.91 3.67 19.32
3.74 258.52 -2.66
*F9FT 17 3.15
12.87 3.68 3.50
18.92 5.74 243.96 -2.81
F9FT 17 3.15
12.87 3.57 3.30
18.84 5.74 240.69 -2.83
DJ9BV 3.2 3.22 13.36
3.85 3.58 19.34
3.99 246.42 -2.42
K1FO 14 3.25
13.36 3.78 3.54
19.30 4.26 243.48 -2.42
MBI 3.4 3.41
13.69 3.88 3.63
19.63 7.68 235.12 -1.94
YU7EF 12 3.49
13.67 3.83 3.58
19.60 4.40 224.97 -1.78
*SM5BSZ 11 3.51 13.86
3.50 3.50 19.71
3.16 232.02 -1.80
SM5BSZ 11 3.51 13.86
3.96 3.72 19.79
3.13 238.58 -1.84
*SM5BSZ 11A 3.52 13.97
4.00 4.00 19.96
3.13 244.17 -1.77
SM5BSZ 11A 3.52 13.97
4.05 3.81 19.91
3.07 244.00 -1.82
17LQD EKM 3.59 13.37
3.83 3.59 19.35
4.57 252.49 -2.53
17LQDE BQH 3.59 13.79
4.04 3.81 19.77
3.95 248.40 -2.04
DJ9BV 3.6 3.61 13.73
4.00 3.77 19.64
4.25 258.21 -2.33
K1FO 15 3.65
13.78 3.94 3.70
19.70 3.33 238.55 -1.93
DK7ZB
12 3.83 14.25
4.30 4.08 20.26
5.69 250.62 -1.64
YU7EF 13 3.92
14.09 4.01 3.77
20.03 5.13 222.70 -1.30
DJ9BV OPT 3.99 14.22
4.29 4.08 20.18
4.99 248.48 -1.63
#DJ9BV OPT 3.99 14.22
4.19 4.19 20.21
5.03 247.16 -1.57
#SV 2SA13 4.01 14.46
4.20 4.20 20.44
4.67 246.84 -1.34
SV 2SA13 4.01
14.46 4.37 4.16
20.43 4.67 247.35 -1.36
DJ9BV 4.0 4.02 14.07
4.15 3.92 19.98
5.67 255.50 -1.95
HG215DX 4.02
14.20 4.25 4.03
20.14 6.44 258.47 -1.84
CC3219 MOD 4.05 14.20
4.34 4.13 20.17
4.28 256.17 -1.77
*CC4218XL 4.15 14.14
4.08 3.85 20.03
7.25 265.93 -2.07
CC4218XL 4.15
14.14 4.45 4.23
20.11 7.17 266.22 -2.00
WB9UWA 15 4.18 13.62
3.69 3.43 19.48
8.00 214.69 -1.69
CC4218 MOD 4.18 14.29
4.24 4.02 20.24
5.25 244.97 -1.51
YU7EF 14 4.37
14.58 4.23 4.00
20.51 4.63 223.20 -0.83
K1FO 17 4.41
14.44 4.22 4.00
20.35 4.34 234.51 -1.21
DJ9BV 4.4 4.42 14.36
4.28 4.06 20.25
6.19 256.51 -1.70
SHARK 20 4.46
14.39 4.32 4.10
20.26 2.90 264.04 -1.81
I0JXX 16 4.47
14.39 4.17 3.94
20.32 6.09 223.60 -1.03
#I0JXX 16 4.47 14.39
4.06 4.06 20.35
6.11 223.23 -0.99
*CC17B2 4.51
14.53 3.66 3.51
20.22 4.83 233.29 -1.31
CC17B2 4.51
14.53 4.28 4.06
20.47 4.99 234.82 -1.08
DK7ZB
14 4.71 15.04
4.73 4.54 21.02
6.90 245.10 -0.73
K1FO 18 4.77
14.72 4.35 4.14
20.63 4.54 234.66 -0.93
*M2 28 XPOL 4.80 15.22
4.50 4.50 21.14
17.04 258.67 -0.84
#M2 28 XPOL 4.80 15.22
4.76 4.76 21.22
17.15 257.77 -0.76
M2 28 XPOL 4.80 15.22
4.86 4.66 21.19
17.11 257.51 -0.77
HG217DX 4.82
14.81 4.63 4.43
20.78 8.14 256.05 -1.16
DJ9BV 4.8 4.83 14.65
4.40 4.18 20.57
5.85 255.84 -1.37
*M2 5WL 4.83
14.80 4.15 3.84
20.56 8.49 254.92 -1.36
M2 5WL 4.83
14.80 4.56 4.35
20.74 8.70 251.18 -1.11
YU7EF 15 4.84
14.98 4.44 4.23
20.92 4.89 221.29 -0.38
*SM5BSZ 14A 4.89 15.14
4.00 4.00 20.93
4.33 232.02 -0.58
SM5BSZ 14A 4.89 15.14
4.54 4.33 21.03
4.43 238.02 -0.59
RA3AQ-15 4.92
15.14 4.67 4.48
21.10 4.42 239.26 -0.54
#RA3AQ-15 4.92 15.14
4.56 4.56 21.12
4.43 239.19 -0.52
*SM5BSZ 14 4.95 15.29
5.20 5.20 21.37
3.13 246.72 -0.41
SM5BSZ 14 4.95 15.29
4.72 4.51 21.19
3.02 233.77 -0.68
SM2CEW 19 4.98 14.91
4.47 4.26 20.84
9.38 233.77 -0.70
#SM2CEW 19 4.98 14.91
4.37 4.37 20.87
9.00 232.88 -0.66
*BVO-5WL 5.02
15.05 4.58 4.40
20.99 5.21 243.42 -0.73
#BVO-5WL 5.02
15.05 4.59 4.59
21.04 5.24 242.36 -0.66
BVO-5WL 5.02
15.05 4.69 4.49
21.01 5.23 242.70 -0.70
K5GW 17 5.06
14.99 4.64 4.44
20.96 6.16 244.55 -0.78
K1FO 19 5.18
15.01 4.47 4.27
20.92 4.04 232.19 -0.59
#RU1AA 15 5.27 15.55
4.85 4.85 21.55
6.02 235.76 -0.03
RU1AA 15 5.27
15.55 4.85 4.65
21.50 5.99 236.28 -0.09
*M2 18XXX 5.32 15.07
4.27 3.96 20.85
7.90 243.30 -0.87
M2 18XXX 5.32
15.07 4.55 4.35
21.01 7.95 240.56 -0.66
M2 32 XPOL 5.62 15.70
5.23 5.04 21.69
15.02 250.74 -0.16
#M2 32 XPOL 5.62 15.70
5.13 5.13 21.71
15.04 251.20 -0.15
*M2 19XXX 5.73 15.41
4.27 4.04 21.15
8.75 238.80 -0.49
M2 19XXX 5.73
15.41 4.70 4.51
21.36 8.75 235.52 -0.22
#M2 32 XPOL 5.73 15.88
5.07 5.07 21.87
16.03 248.46 +0.06
M2 32 XPOL 5.73 15.88
4.98 5.16 21.84
16.03 248.11 +0.04
DK7ZB
17 5.81 15.69
5.16 4.98 21.68
6.16 234.46 +0.12
BVO-6WL 6.00
15.69 4.75 4.93
21.63 5.12 231.63 +0.13
#BVO-6WL 6.00
15.69 4.84 4.84
21.66 5.13 231.84 +0.15
AF9Y 22 6.15
15.75 5.04 4.86
21.72 10.04 230.73 +0.23
RA3AQ-18 6.28
16.11 5.13 4.96
22.05 4.97 227.80 +0.62
*RA3AQ-18 6.28 16.11
5.30 5.30 22.13
4.99 227.28 +0.71
#RA3AQ-18 6.28 16.11
5.05 5.05 22.08
4.98 227.31 +0.64
MBI 6.6 6.6
16.14 5.46 5.29
22.14 13.09 238.73 +0.51
#MBI 6.6 6.6
16.14 5.38 5.38
22.17 13.07 239.28 +0.53
BQH 25 7.29
16.31 5.22 5.04
22.25 9.83 224.18 +0.89
#BQH 25 7.29
16.31 5.13 5.13
22.28 9.86 224.61 +0.91
K2GAL 21 7.65
16.80 5.75 5.59
22.75 19.58 245.81 +0.99
M2 8WL(old) 7.71 16.55
5.28 5.10 22.40
9.52 231.46 +0.90
M2 8WL(new) 8.05 17.05
5.82 5.67 23.01
11.53 237.20 +1.40
Legend:
L = Length in Wavelengths
Gain = Gain in dBd of a single antenna
E = E plane (Horizontal) stacking in Meters.
H = H plane (Vertical) stacking in Meters.
Ga = Gain in dBd of a 4 bay array
Tlos = The internal resistance of the antenna in degrees Kelvin.
Ta = The total temperature of the antenna or array in
degrees Kelvin. This
includes all the side lobes, rear
lobes and internal resistance of the
antenna or array.
G/T = Figure of merit used to determine the receive capability of
the antenna
or array = (Ga + 2.15) - (10*log
Ta). The more positive figure the
better.
Notes:
1. The Program used to
calculate E/H Stacking,G,Ga and G/T is YAGI
ANALYSIS
3.54 by Goran Stenberg,SM2IEV.
2. Temperatures used:
Tsky=200 degrees;Tearth=1000 degrees
3. All dipoles have been
adjusted to give a J of under +/- .5
4. No stacking harness
losses or H frame effects are included in the
gain
figures.
5. All stacking dimensions
EXCEPT those marked with a "*" and "#" are
calculated
from the DL6WU stacking formula.
6. Antennas marked with a
"*" have stacking dimensions recommended by
the
manufacturer or designer.
7. Antennas marked with a
"#" have stacking dimensions for XPOL
antennas
by VE7BQH.
8. Antennas marked with a
"@" have some or all 10MM elements. All others
are 4MM to
6MM.
9. Manufacturer/Designer
Legend:
AF9Y =
AF9Y
I0JXX =
I0JXX
BVO =
Eagle/DJ9BV K1FO
= K1FO
BQH =
VE7BQH
K2GAL = K2GAL
CC =
Cushcraft
K5GW = Texas Towers/K5GW
CC
MOD =
VE7BQH
M2 = M^2
CD = CUE
DEE
MBI = F/G8MBI
CD
MOD =
VE7BQH
OZ5HF = Vargarda
DJ9BV =
DJ9BV
RA3AQ = RA3AQ
DJ9BV OPT
= DJ9BV
RU1AA = RU1AA
DK7ZB =
DK7ZB
SHARK = SHARK (Italian)
EKM
MOD =
SM2EKM
SM2CEW = SM2CEW/VE7BQH
F9FT =
F9FT
SV = Svenska
Antennspecialisten AB
HG =
HYGAIN
W1JR = VE7BQH (Mininec error)
Flexa =
FlexaYagi WB9UWA
= WB9UWA
YU7EF = YU7EF