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.
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
LIONEL H. EDWARDS
VE7BQH
Issue 53 June 17, 2006
Issue 51: Add YU7EF Antennas
Issue 52: Update all DK7ZB antennas to latest published data. add DK7ZB 8
Issue 53: Replace BQH8A with BQH8B a 50 ohm antenna