DG7YBN / 432 MHz VE7BQH G/Ta Table
  Issue 22, Feb. 2023


                             

      The 432 MHz G/Ta Table is a compilation of simulations of 4-Yagi-Bays at 432.1 MHz. The main purpose of this table is to enable you to select a
      Yagi design by its performance level for non-terrestrial weak signal work such as EME. Thus the G/T number presented is computed for an elevation
      of the array of 30 degrees as a typical position of the moon. Some theoretical details about G/Ta and G/T-System can be found here

     

      This is the 2nd Interactive G/Ta Chart VE7BQH: "Tsky and Tearth is now Interactive or changeable by the user."
      Preset Tsky and Tearth have changed and now are acc. ITU recommendations P.372-13, Radio Noise.
      He thanks Vladimir, UR5EAZ for coming up with the idea and developing the actual MS Excel ®.
      Since last issue these tables also hold G/Tsystem (tnx UR5EAZ) with RX NF = 0.75 dB and interactive in the real MS Excel.

      Interactivity is not available online, sry.


Old Reference: Tsky=20K Tearth=350K Reference: Estimated Values for man made noise (Tearth) on 432 MHz:
New Reference: Tsky=27K Rural = 760 Man-Made Noise in Our Living Environments
Residential = 1800 U.R.S.I. Radio Science Bulletins No. 334, 09.2010
City =                                   7900 8200
Enter Tsky >  27 K        Enter T_earth, K > 1800 K Enter Receive System NF > 0,75 dB K
                      DL6WU Optimal Stacking         1 Ant.    
    1  Ant.           4 Antennas     < H Plane           >        
TYPE OF Length GAIN E H Ga Tlos Ta Ant G/T Sys G/T F/R 1st SL 2nd SL Z VSWR Feed Convergence
ANTENNA (m) (dBi) (m) (m) (dBi) (K) (K) (dB) (dB) (dB) (dB) (dB) (ohms) Bandwidth System Correction req.
F5FOD Isotropic Lossless Radiator 0,00 0,00 - - - 0,01 913,48 -29,61 -29,86 - -     - -       -           -          No
KF2YN Boxkite 4 0,31 13,24 1,20 0,85 19,30 4,93 183,57 -3,34 -4,47 26,10 21,5 none 52,5 1.10:1 Bent Dipole Yes
KF2YN Boxkite 7 0,93 15,64 1,40 1,17 21,56 8,14 113,26 1,02 -0,69 27,60 27,5 21,3 51,7 1.05:1 Bent Dipole Yes
DG7YBN GTV70-8n 1,28 13,60 1,07 0,93 19,56 4,90 124,06 -1,38 -2,96 24,80 16,5 21,7 49,8 1.83:1 Bent Dipole Yes
KF2YN Boxkite 10 1,64 16,55 1,50 1,30 22,46 8,73 89,62 2,94 0,87 28,30 19,2 28,0 48,7 1.08:1 Bent Dipole Yes
InnoV 10 LFA 1,69 14,43 1,12 1,03 20,36 3,67 99,81 0,37 -1,53 23,80 17,2 23,3 50,7 1.13:1 LFA-LOOP Yes
InnoV 10 LFA 2018 1,71 14,35 1,11 1,01 20,27 3,65 96,08 0,44 -1,51 22,06 18,6 21,4 48,8 1.25:1 LFA-LOOP Yes
YU7EF EF7010-5 1,80 14,64 1,14 1,05 20,56 5,00 97,86 0,65 -1,27 22,50 16,9 24,1 50,0 1.06:1 Dipole No
+DG7YBN GTV 70-11w 1,95 14,97 1,18 1,09 20,90 2,70 84,71 1,62 -0,54 27,80 15,9 23,4 50,0 1.06:1 Bent Dipole No
YU7EF EF7011B-5 1,99 15,07 1,20 1,11 21,00 4,70 94,25 1,26 -0,73 25,39 16,9 20,1 49,0 1.56:1 Dipole No
Innov 11 LFA 1,99 15,05 1,20 1,10 20,98 3,95 84,64 1,70 -0,46 25,60 16,4 23,8 50,4 1.07:1 LFA-LOOP Yes
*Innov 11 LFA 1,99 15,05 1,19 1,10 20,96 3,95 84,11 1,71 -0,46 25,61 16,4 23,8 50,4 1.07:1 LFA-LOOP Yes
EAntenna 432LFA11 2,04 15,09 1,20 1,11 21,02 3,93 86,71 1,64 -0,48 25,35 17,0 24,9 47,9 1.28:1 LFA-LOOP Yes
*YU7EF EF7011V6 2,09 15,13 1,18 1,10 21,02 4,27 67,61 2,72 0,14 28,05 18,8 22,4 50,4 1.03:1 Bent Dipole Yes
*KF2YN Polly 12 CR 2,20 15,70 1,30 1,30 21,74 3,19 79,86 2,72 0,45 25,40 16,1 22,1 48,3 1.17:1 Multi-Pol loop No
+*InnoV 12Y 2,27 15,59 1,26 1,17 21,52 3,11 76,59 2,68 0,34 27,60 15,9 21,8 49,7 1.43:1 LFA-Loop Yes
+InnoV 12Y 2,27 15,59 1,27 1,19 21,54 3,39 77,86 2,63 0,32 27,60 15,9 21,8 49,7 1.43:1 LFA-Loop Yes
InnoV 12 LFA 2,28 15,48 1,24 1,16 21,40 3,95 70,84 2,90 0,41 28,34 16,8 23,3 50,1 1.07:1 LFA-LOOP Yes
*InnoV 12 LFA 2,28 15,48 1,23 1,15 21,37 4,00 69,61 2,94 0,43 28,30 16,8 23,3 50,1 1.07:1 LFA-LOOP Yes
YU7EF EF7012B-5 2,29 15,58 1,26 1,17 21,50 4,90 78,39 2,56 0,26 23,95 17,6 21,3 48,6 1.40:1 Dipole No
EAntenna 432LFA12 2,29 15,32 1,23 1,14 21,24 4,32 80,17 2,20 -0,06 28,58 16,1 24,5 50,1 1.45:1 LFA-LOOP Yes
InnoV 12 LFA-430 2,30 15,59 1,27 1,19 21,54 3,11 77,66 2,64 0,32 26,35 15,5 21,7 49,9 1.39:1 LFA-LOOP Yes
WD5AGO 12B 2,31 15,59 1,27 1,18 21,52 4,67 81,42 2,41 0,18 24,94 15,4 23,0 39,2 1.33:1 Dipole No
WD5AGO 12C 2,32 15,50 1,24 1,15 21,40 4,23 67,13 3,13 0,54 29,22 16,6 25,0 35,8 1.35:1 Dipole yes
KF2YN Boxkite 13 2,34 17,38 1,63 1,50 23,30 9,28 94,19 3,56 1,57 28,00 18,0 29,0 50,9 1.09:1 Bent Dipole Yes
+DG7YBN GTV70-13m 2,49 15,75 1,25 1,17 21,57 2,66 55,74 4,11 1,14 29,22 17,1 22,4 49,2 1.14:1 Bent Dipole Yes
Innov 13 LFA 2,58 15,92 1,31 1,23 21,85 4,50 67,08 3,58 1,00 29,54 16,5 23,2 50,1 1.15:1 LFA-LOOP Yes
*InnoV 13 LFA 2,58 15,92 1,30 1,22 21,83 4,50 66,54 3,60 0,99 29,54 16,5 23,2 50,1 1.15:1 LFA-LOOP Yes
YU7EF EF7013M-6 2,66 16,11 1,33 1,25 22,01 4,70 77,06 3,14 0,81 26,41 18,7 21,8 49,4 1.06:1 Dipole No
M2 432-12EME 2,76 16,22 1,39 1,32 22,11 3,92 121,19 1,28 -0,34 19,71 12,3 16,0 200,4 1.49:1 Folded Dipole Yes
*M2 432-12EME 2,76 16,22 1,42 1,37 22,17 3,92 123,34 1,26 -0,33 19,71 12,3 16,0 200,4 1.49:1 Folded Dipole Yes
F9FT 19 2,79 15,96 1,33 1,26 21,88 6,07 104,55 1,69 -0,14 21,53 14,1 17,5 55,7 1.14:1 Folded Dipole Yes
DG7YBN Tonna 19 mod 2,79 16,17 1,35 1,27 22,07 6,07 74,62 3,34 0,95 22,36 14,3 18,7 44,7 1.15:1 Folded Dipole Yes
InnoV 14 LFA 2,80 16,46 1,38 1,32 22,31 4,50 66,49 4,08 1,48 30,78 16,0 22,3 52,6 1.14:1 LFA-LOOP Yes
*InnoV 14 LFA 2,80 16,46 1,36 1,29 22,26 4,50 65,47 4,10 1,46 30,60 16,0 22,3 52,6 1.14:1 LFA-LOOP Yes
+DG7YBN GTV70-14m 2,82 16,38 1,38 1,31 22,31 3,80 74,30 3,60 1,21 26,90 15,9 20,6 49,4 1.51:1 Bent Dipole No
YU7EF EF7014M-6 2,94 16,50 1,39 1,32 22,39 4,50 80,03 3,36 1,10 23,76 17,9 20,5 49,5 1.11:1 Dipole No
RA3AQ AQ70-14f 2,98 16,65 1,41 1,34 22,54 6,94 71,59 3,99 1,53 26,11 15,9 20,0 53,3 1.09:1 Folded Dipole Yes
KF2YN Boxkite 16 3,03 18,02 1,74 1,61 23,85 10,17 99,47 3,87 1,97 27,40 17,0 25,0 49,1 1.06:1 Bent Dipole Yes
*KF2YN Polly 15 CR 3,08 16,76 1,40 1,40 22,66 3,50 67,47 4,37 1,79 26,70 16,3 20,3 47,4 1.21:1 Multi-pol loop No
I0JXX 16JXX70 old ver 3,09 16,53 1,41 1,33 22,44 4,86 80,00 3,41 1,15 23,43 16,6 21,3 201,8 1.05:1 T Match Yes
I0JXX 32JXX70 XPOL H new ver 3,09 16,28 1,37 1,37 22,17 5,94 120,77 1,35 -0,27 18,61 15,0 18,0 206,6 1.03:1 T Match Yes
I0JXX 32JXX70 XPOL V new ver 3,09 16,28 1,37 1,37 22,18 4,38 123,07 1,28 -0,32 18,61 15,0 18,0 206,6 1.03:1 T Match Yes
EAntenna 432LFA15 3,17 15,66 1,22 1,14 21,36 4,03 56,06 3,87 0,92 29,16 26,2 29,1 48,4 1.25:1 LFA-LOOP Yes
InnoV 15 LFA 3,18 16,68 1,42 1,34 22,57 4,77 60,92 4,72 1,94 31,06 15,8 22,1 51,1 1.08:1 LFA-LOOP Yes
YU7EF EF7015M-5 3,25 16,80 1,43 1,36 22,66 5,40 77,95 3,74 1,43 24,25 19,0 21,1 49,5 1.03:1 Dipole No
Konni F20 3,31 16,69 1,44 1,36 22,61 1,74 81,98 3,47 1,25 21,93 14,0 16,4 210,7 1.06:1 Folded Dipole Yes
WiMo 15 (YU7EF) 3,39 17,06 1,46 1,30 22,87 4,30 63,12 4,87 2,16 22,30 17,2 20,8 174,5 3.05:1 Folded Dipole Yes
InnoV 16 LFA 3,60 17,27 1,50 1,43 23,15 4,77 59,37 5,41 2,58 29,29 18,1 23,3 48,4 1.19:1 LFA-LOOP Yes
+DG7YBN GTV70-17w 3,63 17,29 1,51 1,44 23,20 3,00 65,22 5,06 2,41 31,50 14,7 20,8 49,9 1.03:1 Bent Dipole No
InnoV 17 LFA 3,70 17,25 1,49 1,42 23,11 4,28 61,05 5,25 2,48 27,36 18,1 23,5 49,9 1.03:1 LFA-LOOP Yes
*InnoV 17 LFA 3,70 17,25 1,45 1,45 23,11 4,28 60,51 5,29 2,50 27,36 18,1 23,5 49,9 1.03:1 LFA-LOOP Yes
YU7EF EF7017M-5 3,86 17,41 1,52 1,44 23,22 5,60 76,06 4,41 2,06 25,00 18,5 22,3 50,7 1.06:1 Dipole No
*KF2YN Polly 18 CR 3,95 17,79 1,95 1,95 23,96 3,70 73,10 5,32 2,90 28,30 14,8 20,0 48,1 1.18:1 Multi-Pol loop No
YU7EF EF7017XM-5 3,98 17,61 1,55 1,49 23,45 6,36 66,65 5,21 2,61 27,46 21,6 24,0 52,2 1.19:1 Dipole Yes
RA3AQ AQ70-18f 3,98 17,76 1,59 1,53 23,64 6,08 69,85 5,20 2,69 27,24 16,1 20,5 51,7 1.08:1 Folded Dipole Yes
InnoV 18 LFA 4,00 17,49 1,52 1,45 23,33 4,28 57,34 5,75 2,84 28,20 18,5 24,8 49,8 1.05:1 LFA-LOOP Yes
+DG7YBN GTV70-19m 4,12 17,80 1,60 1,54 23,68 3,60 63,30 5,67 2,96 29,60 15,4 20,2 49,3 1.28:1 Bent Dipole No
+Konni F20 Mod YBN 4,12 17,57 1,58 1,50 23,42 1,74 85,21 4,12 1,96 24,66 14,3 16,1 223,4 1.13:1 Folded Dipole Yes
YU7EF EF7018M-5 4,16 17,58 1,53 1,46 23,33 5,50 68,41 4,98 2,43 26,49 17,5 22,4 49,2 1.06:1 Dipole No
K1FO 22 4,23 17,85 1,63 1,56 23,75 4,75 80,45 4,69 2,44 20,55 15,4 21,2 200,8 1.34:1 T Match Yes
*InnoV 18 LFA 2019 4,24 17,84 1,56 1,53 23,71 5,08 54,34 6,36 3,34 30,70 16,5 28,5 48,2 1.17:1 LFA-LOOP Yes
EAntenna 432LFA18 4,25 17,88 1,61 1,55 23,76 5,60 56,34 6,25 3,31 30,35 16,0 26,2 47,6 1.42:1 LFA-LOOP Yes
YU7EF EF7019B-5 4,46 17,91 1,60 1,54 23,72 5,70 71,89 5,15 2,70 25,70 17,8 23,4 50,5 1.12:1 Dipole No
KF2YN Polly 20 CR 4,51 18,30 1,90 1,90 24,43 3,80 71,07 5,91 3,44 28,70 14,4 19,5 48,8 1.21:1 Multi-Pol loop No
InnoV 19 LFA 4,54 18,18 1,68 1,63 24,10 5,02 55,82 6,63 3,67 34,30 15,0 20,1 47,6 1.09:1 LFA-LOOP Yes
InnoV 19 LFA 2019 4,55 18,12 1,71 1,65 24,05 7,02 59,23 6,32 3,48 26,97 15,2 30,0 50,1 3.57:1 LFA-LOOP Yes
Tonna 21 DX 4,58 17,91 1,67 1,61 23,80 6,65 114,42 3,21 1,52 20,48 14,5 18,2 58,4 2.32:1 Folded Dipole Yes
KF2YN Boxkite 22 4,65 19,26 1,99 1,90 25,14 10,75 91,61 5,52 3,49 29,00 16,2 21,2 52,1 1.17:1 Bent Dipole Yes
DG7YBN GTV70-21n 4,69 18,82 1,68 1,63 24,08 7,07 52,06 6,92 3,80 32,35 14,8 21,1 48,3 1.48:1 Bent Dipole Yes
InnoV 20 LFA 4,85 18,28 1,73 1,67 24,31 5,02 50,01 7,32 4,11 35,15 15,1 20,7 50,5 1.09:1 LFA-LOOP Yes
InnoV 20 LFA 2019 4,86 18,44 1,76 1,70 24,38 5,86 48,94 7,48 4,23 30,00 14,7 22,4 48,0 1.53:1 LFA-LOOP Yes
+YU7XL QY721104D14 4,88 18,42 1,88 1,82 24,47 3,40 51,76 7,33 4,20 27,68 18,5 22,8 201,1 1.28:1 LFA 200 Ώ Yes
RA3AQ AQ70-21f 4,95 18,54 1,73 1,67 24,41 6,94 57,41 6,82 3,91 27,87 16,8 21,3 52,3 1.07:1 Folded Dipole Yes
BVO70-7.2 WL modified 4,97 18,49 1,76 1,70 24,42 3,80 80,75 5,35 3,10 22,56 14,9 19,1 49,5 1.06:1 Dipole No
Directive DSEFO432-25 5,13 18,57 1,74 1,69 24,47 5,09 65,42 6,31 3,68 25,39 15,9 20,5 198,2 1.38:1 T Match Yes
*Directive DSEFO432-25  5,13 18,57 1,78 1,68 24,47 4,90 65,23 6,33 3,68 25,39 15,9 20,5 198,2 1.38:1 T Match Yes
Directive DSEFO432-25XPOL H 5,13 18,57 1,73 1,73 24,48 5,11 64,90 6,36 3,70 25,40 15,9 20,5 198,2 1.38:1 T Match Yes
Directive DSEFO432-25XPOL V 5,13 18,57 1,73 1,73 24,48 5,40 64,63 6,38 3,71 25,40 15,9 20,5 198,2 !.38:1 T Match Yes
InnoV 22 LFA 2019-2 5,18 18,84 1,82 1,76 24,74 6,69 44,89 8,22 4,76 31,15 14,0 28,0 46,2 2.67:1 LFA Loop Yes
InnoV 21 LFA 2019 5,21 18,53 1,82 1,76 24,58 6,43 47,89 7,78 4,47 28,19 14,1 26,4 47,9 1.53:1 LFA Loop Yes
+DG7YBN GTV70-23m 5,24 18,65 1,76 1,70 24,51 3,80 53,35 7,24 4,18 32,30 15,7 21,8 48,4 1.56:1 Bent Dipole Yes
YU7EF EF7021B-5 5,27 18,66 1,74 1,68 24,50 7,80 61,14 6,64 3,86 29,60 20,3 21,7 50,2 1.33:1 Dipole No
I0JXX 25JXX70 5,49 18,53 1,74 1,68 24,41 5,61 72,10 5,83 3,38 23,91 21,3 24,8 198,6 1.12:1 T Match Yes
InnoV 22 LFA 2019 5,52 18,84 1,85 1,80 24,77 6,76 43,80 8,36 4,84 32,00 13,9 28,5 46,2 2.66:1 LFA Loop Yes
KF2YN Polly 24 CR 5,65 19,15 1,90 1,90 25,11 3,70 70,95 6,60 4,12 29,50 13,1 19,1 51,8 1.14:1 Multi-Pol loop No
*Antennas-Amplifiers PA432-23-6A 5,69 18,88 1,90 1,90 24,90 6,70 46,84 8,19 4,84 36,26 17,0 26,9 49,1 1.09:1 Hair Pin Yes
+YU7XL QY724104D17 5,79 19,01 2,00 1,90 24,99 3,40 51,22 7,90 4,74 31,67 18,7 22,8 199,0 1.23:1 LFA 200 Ώ Yes
+DG7YBN GTV70-25m 5,82 18,97 1,80 1,74 24,84 3,20 48,28 8,00 4,71 32,60 16,3 22,1 41,2 1.25;1 Bent Dipole No
InnoV 23 LFA  5,83 19,16 1,87 1,82 25,08 5,59 47,89 8,28 4,97 31,75 15,9 21,7 45,2 1.23:1 LFA-LOOP Yes
*InnoV 23 LFA 5,83 19,16 1,89 1,85 25,06 5,59 47,89 8,26 4,95 31,80 15,9 21,7 45,2 1.23:1 LFA-LOOP Yes
DJ9BV BVO70-8.5wl 5,85 19,14 1,95 1,90 25,13 5,00 98,40 5,20 3,28 24,25 14,9 17,8 203,9 1.45:1 Folded Dipole Yes
InnoV 23 LFA 2019 5,85 19,02 1,87 1,82 24,94 6,40 43,02 8,60 5,04 32,19 14,4 27,6 47,4 1.32:1 LFA-LOOP Yes
DJ9BV OPT70-8.5wl 5,86 19,04 1,80 1,75 24,87 4,88 81,64 5,75 3,52 23,22 15,8 20,1 186,1 1.56:1 Folded Dipole Yes
EAntenna 432LFA23 5,86 18,96 1,90 1,84 24,89 8,05 45,77 8,28 4,87 31,99 14,2 30,9 47,8 3.99:1 LFA-LOOP Yes
YU7EF EF7023B-5 5,88 18,98 1,79 1,73 24,78 6,39 55,42 7,34 4,36 30,47 19,6 21,9 48,6 1.21:1 Dipole No
RA3AQ AQ70-24f 5,91 19,22 1,87 1,82 24,82 6,07 50,39 7,80 4,61 30,00 15,1 21,0 52,0 1.13:1 Folded Dipole Yes
InnoV 24 LFA 6,17 19,32 1,92 1,87 25,25 5,87 46,00 8,62 5,22 33,42 15,3 22,1 46,4 1.19:1 LFA-LOOP Yes
*InnoV 24 LFA 6,17 19,32 1,89 1,84 25,22 5,87 45,46 8,64 5,21 33,40 15,3 22,1 46,4 1.19:1 LFA-LOOP Yes
YU7EF EF7024B-5 6,17 19,19 1,84 1,79 25,02 7,50 57,53 7,42 4,52 30,30 20,5 22,4 50,1 1.60:1 Dipole No
Innov 24 LFA 2019-b 6,21 19,20 1,89 1,83 25,11 6,16 43,14 8,76 5,21 33,23 30,6 29,4 50,1 1.60:1 LFA-LOOP Yes
M2 432-9WLA 6,38 19,40 2,02 1,96 25,33 7,22 118,96 4,58 2,93 23,24 15,8 18,1 167,2 2.09:1 Folded Dipole Yes
*M2 432-9WLA 6,38 19,40 1,83 1,88 25,23 6,98 102,05 5,14 3,28 23,24 15,8 18,1 167,2 2.09:1 Folded Dipole Yes
+YU7XL QY728107D21 6,94 19,64 2,22 2,06 25,65 3,40 51,76 8,51 5,38 28,60 19,1 24,1 198,1 1.29:1 LFA 200 Yes
Antennas-Amplifiers PA432-26-7BGP 6,96 19,60 1,95 1,95 25,49 7,36 44,26 9,03 5,54 36,30 16,2 28,2 47,9 1.07:1 HairPin No
YU7EF EF7027B-5 7,06 19,67 1,94 1,89 25,47 7,80 60,60 7,65 4,85 25,60 20,0 23,2 50,3 1.64:1 Dipole No
Hy-Gain UB-7031DX 7,23 19,54 1,92 1,86 25,33 5,24 76,03 6,52 4,17 26,23 18,3 21,1 199,5 1.26:1 T Match Yes
WiMo 27 (YU7EF) 7,24 19,43 1,85 1,80 25,08 4,30 49,42 8,14 4,91 27,09 20,5 22,6 191,8 2.72:1 Folded Dipole Yes
+DG7YBN GTV70-30m 7,28 19,74 1,94 1,89 25,58 3,90 43,26 9,22 5,67 32,86 18,9 26,0 42,5 1.28:1 Bent Dipole No
K1FO 33 7,36 20,03 2,08 2,04 25,95 6,13 65,19 7,81 5,16 22,03 15,5 22,2 200,5 1.19:1 T Match Yes
Directive DSEFO432-33 7,36 20,03 2,08 2,04 25,95 6,13 65,19 7,81 5,16 22,03 15,5 22,2 200,5 1.19:1 T Match Yes
RA3AQ AQ70-30f 7,90 20,33 2,08 2,04 26,08 5,53 45,72 9,48 6,06 30,57 16,8 22,1 51,6 1.10:1 Folded Dipole Yes
InnoV 30 LFA  8,08 20,45 2,27 2,22 26,42 6,67 56,64 8,89 5,96 36,60 13,9 20,3 49,6 2.38:1 LFA-LOOP Yes
*YU7EF EF7032-5 8,67 19,97 1,94 1,90 25,58 6,64 51,56 8,46 5,32 27,70 23,1 24,2 51,3 3.44:1 Dipole No
InnoV 33 LFA 9,04 20,85 2,32 2,29 26,81 5,33 52,40 9,62 6,51 36,55 13,3 19,2 50,1 1.17:1 LFA-LOOP Yes
DJ9BV OPT70-13wl 9,22 20,85 2,35 2,29 26,80 5,15 78,12 7,87 5,57 25,93 14,8 19,7 183,0 1.44:1 Folded Dipole Yes
M2 432-13WLA 9,22 20,81 2,32 2,28 26,69 7,16 116,31 6,03 4,36 22,36 19,2 20,9 199,9 2.35:1 Folded Dipole Yes
*M2 432-13WLA 9,22 20,81 2,08 2,08 26,40 7,77 125,58 5,41 3,84 22,36 19,2 20,9 199,9 2.35:1 Folded Dipole Yes
InnoV 34 A LFA 2019 9,35 20,98 2,40 2,38 26,95 6,44 52,74 9,73 6,64 37,81 12,9 18,0 50,1 1.63:1 LFA-LOOP Yes
I0JXX 39JXX70 9,39 20,16 2,00 1,97 25,86 6,30 59,55 8,11 5,28 26,05 26,7 27,0 194,0 1.19:1 T Match Yes
InnoV 34 LFA B 2019 9,39 20,89 2,40 2,38 26,89 7,19 53,59 9,60 6,55 37,25 12,7 17,9 50,1 2.04:1 LFA-LOOP Yes
*InnoV 34 LFA B 2019 9,39 20,89 2,20 2,20 26,72 6,91 47,43 9,96 6,63 37,25 12,7 17,9 50,1 2.04:1 LFA-LOOP Yes
InnoV 35 LFA 2019 9,67 20,95 2,46 2,43 26,93 7,46 57,86 9,31 6,42 36,67 12,7 18,1 49,1 2.69:1 LFA-LOOP Yes
InnoV 38 LFA 10,69 21,45 2,30 2,35 27,23 6,89 46,39 10,57 7,18 36,90 12,7 17,0 49,3 1.87:1 LFA-LOOP Yes
*InnoV 38 LFA 10,69 21,45 2,59 2,56 27,26 6,33 45,35 10,69 7,26 36,90 12,7 17,0 49,3 1.87:1 LFA-LOOP Yes
InnoV 39 LFA 2019 10,96 21,59 2,52 2,49 27,54 6,15 45,82 10,93 7,52 39,54 12,9 18,9 49,2 1.15:1 LFA-LOOP Yes
InnoV 40 LFA 2019 11,27 21,82 2,59 2,56 27,63 7,00 45,02 11,10 7,64 35,64 12,7 19,2 51,8 1.55:1 LFA-LOOP Yes
Only Antennas that have actually been built are posted in these Tables, except for the F5FOD Isotropic Lossless Radiator.
Thanks to Vladimir, UR5EAZ for establishing the Interactive Mode in the 144 and 432 Tables
Thanks to Hartmut,  DG7YBN for his ongoing support and many inputs to the Tables
Legend:
1. L      = Length in Wavelengths
2. Gain  = Gain in dBi of a single antenna
3. E      = E plane (Horizontal) stacking in Meters. 
4. H      = H plane (Vertical) stacking in Meters.
5. Ga     = Gain in dBi of a 4 bay array
6. Tlos   = The internal resistance of the antenna in degrees Kelvin.
7. 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.
8. F/R    = Front to Rear in dB over the rear 180 degrees of an antenna using either E or H plane. 
9. Z ohms = The natural impedence of a single antenna in free space.  
10. VSWR  = VSWR Bandwidth is based a single antenna over 432.000 - 435.000 MHz with a 
                    reference at 432.300 MHz. This parameter gives an indicator of the
                    antenna "Q" and what to expect with with stacking and wet weather.  
 
11. Ant G/T = Figure of merit used to determine the receive capability of the antenna
                     or array. Ant G/T (dB) = Ga - 10*log(Ta). The more positive figure the 
                     better. Ant G/T is modelled in Tant.exe at 30 degrees elevation.
   Notes:
        
1. The programs used to calculate E/H Stacking,G,Ta,Tlos and G/T are
   EZNEC 5+ by Roy Lewallen W7EL,4NEC2 by Arie Voors and Tant.exe by Sinisa, YT1NT/VE3EA or AGTC_lite by F5FOD/DG7YBN 
   This combination of software provides excellent accuracy. Segment Density is
   25 segments per half wave.
2. Temperatures initially used: Tsky=20 degrees;Tearth=350 degrees
    Temperatures now adjustable to Tsky=27 Kelvin. Tearth: Rural = 460K Kelvin, Residential = 1800K Kelvin, City = 7900 Kelvin
3. Dipole Z is measured at 432.1 MHz
4. F/R, 1st and 2nd Side Lobes (SL) have been calculated on a single antenna
5. No stacking harness losses or H frame effects are included in the 4 bay gain figures.
6. All stacking dimensions EXCEPT those marked with a "*" and "#" are
    calculated from the DL6WU stacking formula:
    D = W/(2* sin(B/2))
    Where:
    D = stacking distance,vertical or horizontal
    W = wavelength, in the same units as D
    B = beamwidth between -3dB points.
    Use vertical beamwidth for vertical stacking (as above),
    Use horizontal beamwidth for horizontal stacking.
7. Antennas marked with a "*" have stacking dimensions recommended by 
   the manufacturer or designer.
8. Antennas marked with a "#" have stacking dimensions for XPOL
   antennas by VE7BQH.
9. Antennas marked with a "+" have some or all elements over 6mm. All others
   are 4MM to 6MM.
10. FD = Folded Dipole    
11.  Convergence Correction: NEC2 and NEC 4 are incapable of handling complex 
      feed systems accurately like Folded Dipoles, T Matches, LFAs etc.
      Convergence Correction using the KF2YN Excel program is required. 
      See DUBUS 4/2010 "The Correction of Convergence Errors in Antenna
      Temperature Calculations by Brian Cake, KF2YN for details.
12.Earth Temperature Definition
       Rural: Open countryside with largely agricultural activity, building density < 1/ha, no major roads, no electrified railways.
       Residential: Villages and pure residential areas with no commercial or industrial activities. No electrified railways and no major roads and no high voltage overhead lines or facilities within 1 km.
       City: Dense commercial or industrial buildings and offices. Major roads and railways can be in the vicinity, but should not be dominating.
13. Manufacturer/Designer Legend: Single click on Sites in blue
   Antennas-Ampifiers=Antenna-Amplifiers K1FO = K1FO
   AF9Y = AF9Y K2GAL = K2GAL
   BVO = Eagle/DJ9BV K5GW = Texas Towers/K5GW
  BQH = VE7BQH KF2YN = KF2YN
   CC = Cushcraft M2 = M²
   CC MOD = VE7BQH MBI = F/G8MBI/F5VHX
   CD = CUE DEE  OZ5HF = Vargarda
   CD MOD = VE7BQH RA3AQ = RA3AQ
   CT1FFU = CT1FFU RU1AA = RU1AA
   DD0VF = DD0VF SHARK = SHARK (Italian)
   DG7YBN = DG7YBN SM2CEW = SM2CEW/VE7BQH
   DJ9BV = DJ9BV SV = Svenska Antennspecialisten AB 
   DJ9BV OPT = DJ9BV Tonna = F9FT
   DK7ZB = DK7ZB UA9TC = UA9TC
   Dual = Antennas-Amplifiers UR5CSZ = UR5CSZ
   Eantenna = EAntenna Vine = G0KSC Design
   EKM MOD = SM2EKM WiMo = WiMo
   F9FT = F9FT W1JR = VE7BQH (Mininec error)
   Flexa = FlexaYagi WB9UWA = WB9UWA
   G0KSC LFA = G0KSC YU7EF = YU7EF
   G4CQM = G4CQM YU7XL = YU7XL
   HG = HYGAIN
   I0JXX = I0JXX
   IK0BZY = IK0BZY
   InnoVAntennas = G0KSC
Using this Chart:
Programmable Tsky and Tearth: Tsky and Tearth may be changed to meet a Stations individual characteristics.
                                                    Click on the Red number to change then click on the green to set.
Antennas with good G/T can provide significant benefit with today's high noise levels. 
Other factors like ease of matching and wet weather performance should be considered in the the decision making.  Lionel H. Edwards
Antennas with 50 ohm feed systems and good VSWR bandwidth (Q) may be the best feed system choice. 
 
Lionel H. Edwards
VE7BQH
Issue 22,Feb 3, 2023
Issue 1: Add YU7EF 32,InnoV 34 LFA,InnoV 38 LFA,InnoV 40 LFA,DG7YBN 19,KF2YN Boxkite 4,KF2YN Boxkite 4,KF2YN Boxkite 7,
Issue 1: Add KF2YN Boxkite 10,KF2YN Boxkite 13,KF2YN Boxkite 16,KF2YN Boxkite 22,WiMo 27 (YU7EF),DG7YBN 14,DG7YBN 23,
Issue 1: Add DJ9BV OPT70 8.5wl,WiMo 15 (YU7EF),InnoV 24 LFA,InnoV30 LFA,
Issue 2: Add DJ9BV OPT70 13wl,K1FO 22,K1FO 33,YU7EF 23B,DJ9BV BVO70 8.5wl,Tonna 21 DX,Konni F20,
Issue 2: Add YU7EF 27,24,21,19,18,15,14,13,12,11,10,I0JXX 30,I0JXX 25,I0JXX 16,RA3AQ 14,RA3AQ 30,RA3AQ 24,
Issue 2: Add RA3AQ 21,RA3AQ 18,InnoV 20 LFA,InnoV 19 LFA,InnoV 18 LFA,InnoV 17 LFA,InnoV 16 LFA,InnoV 10 LFA,
Issue 2: Add KF2YN Polly 15 CR,18 CR,20 CR,24 CR,InnoV 1111 LFA,12 LFA,13 LFA,15 LFA,20 LFA,23 LFA, 33 LFA,
Issue 3: Add YU7XL QY721104D14,YU7XL QY724104D17, YU7XL QY728107D21
Issue 4: Add DG7YBN Tonna 19 mod,
Issue 5: Add EAntenna 432LFA11,EAntenna 432LFA12,EAntenna 432LFA15,EAntenna 432LFA18,EAntenna 432LFA23,
Issue 6: Add Hy-Gain UB-7031DX,M2 432-13WLA,M2 432-12EME,M2 432-9WLA,
Issue 7: Add Directive DSEFO432-33,Directive DSEFO432-25,Konni F20,Directive DSEFO432-25XPOL,I0JXX 32JXX70 XPOL new ver,
Issue 8: Add BVO70-7.2 modified,DG7YBN GTV 70-11W
Issue 9: Add DG7YBN GTV70-25,DG7YBN GTV70-30
Issue 10: Add Programmable Tsky and Tearth
Issue 11: Add DG7YBN GTV70-8n,DG7YBN GTV70-17w
Issue 12: Revised Konni F20 mod YBN,
Issue 13: Add Revised YU7EF EF7018M-5,InnoV 12Y,
Issue 14: Add InnoV 10 LFA 2018,Innov 12 LFA-430, InnoV 24 LFA 2019
Issue 15: Add Innov 18 LFA 2019,Innov 19 LFA 2019,Innov 20 LFA 2019,Innov 21 LFA 2019,
Issue 15: Add Innov 22 LFA 2019,Innov 22 LFA 2019-2,Innov 23 LFA 2019
Issue 16: Tearth Kelvin updated,
Issue 17: Update InnoV 18LFA 2019,Add Antennas-Amplifiers PA432-23-6A, Update InnoV 34 LFA B 2019,
Issue 17: Update InnoV 40 LFA 2019,Add Innov 39 LFA 2019, Add InnoV 34 LFA A 2019,
Issue 18: Add YU7EF EF7017XM-5, Antennas-Amplifiers PA432-26-7BGP,
Issue 19: Add DG7YBN GTV70 21n,DG7YBN GTV70 13,
Issue 20: Add YU7EF EF7011V6,
Issue 21: Add WD5AGO 12B,
Issue 22: Add Receive System NF Thanks to Vladimir UR5EAZ
Issue 22: Charts for all 3 bands have been revised to be more readable.Thanks to Hartmut,DG7YBN



       

        - End of table -

How often has this table been looked up since Feb. 2023?
Flag Counter





        More theory by DG7YBN

        The VE7BQH G/T tables represent Antenna G/T (dB), in short G/Ta, found at the terminals of the sum of individual antennas shown. It is clear that in contrast the
        Systems G/T as S/N in your headphones depends on the noise temperature and gain respectively loss in all following stages and even more so on the actual environments
        noise intensity per direction in relation to beam direction and individual antenna pattern. And this closes the circle. Good S/N in your headphones starts with good
        Antenna G/T. Since what is not delivered to the antenna terminals can never be made up by any PHEMT LNA and lowest loss coax nor smartest RX S/N ratio wise.
        Mind that the best LNA betters the S/N of your RX_Line but contributes noise as function of its NF.

       

        wherein G_System holds all gains and losses in the system starting with antenna gain and down to RX all stages gain. T_Rx_Line represents the sum of Noise Temperatures
        from phasing coax lines down to RX. Further information on deriving T_ant and Antenna G/T can be found in the 'TANT Manual' and 'TANT Appendix' click .



       


Flag Counter