SIMULATIONS OF A 2 and 4 BAY ARRAY OF YAGI ANTENNAS ON 6 METERS 50.150 MHz .......[Opt Stacking]........ .......[75% Stacking]......... 1 Ant Spacing 4 Ant 2E ant 2H ant Spacing 4 Ant 2E ant 2H ant TYPE OF L GAIN E H Gain Gain Gain E H Gain Gain Gain F/R Z VSWR ANTENNA (WL) (dBd) (M) (M) (dBd) (dBd) (dBd (M) (M) (dBd) (dBd) (dBd) (dB) (ohms) Band Width Cushcraft A50-3S 0.29 5.26 5.55 3.84 9.49 8.32 6.46 4.16 2.87 8.69 7.84 6.21 9.0 40.0 1.10:1 DK7ZB 3 28 ohm 0.31 5.74 5.64 3.82 10.00 8.76 7.05 4.23 2.86 9.32 8.34 6.90 10.9 28.6 1.11:1 DK7ZB 3 12.5 ohm 0.31 6.34 5.94 4.11 12.52 9.35 9.45 4.46 3.08 11.47 8.95 8.87 13.7 13.1 1.29:1 Mē 6M3 0.34 6.36 5.98 4.24 12.61 9.38 9.52 4.49 3.18 11.55 8.95 8.98 13.1 17.7 1.26:1 DK7ZB 4 28 ohm 0.36 6.26 5.84 4.06 11.88 9.27 9.39 4.38 3.04 11.36 8.83 8.82 13.5 28.6 1.02:1 YU7EF 4 0.39 6.62 5.94 4.23 12.74 9.62 9.68 4.58 3.17 11.68 9.17 9.15 15.5 50.0 1.05:1 DK7ZB 3 28 ohm 0.42 6.62 5.91 4.20 12.59 9.59 9.56 4.43 3.15 11.64 9.15 9.12 15.0 27.7 1.14:1 DK7ZB 4 12.5 ohm 0.48 7.60 6.54 4.99 13.72 10.59 10.67 4.91 3.74 12.52 10.10 10.05 13.7 11.1 1.39:1 Telrex 4 0.59 7.53 6.54 5.08 13.40 10.47 10.31 4.91 3.81 12.41 10.02 10.15 11.8 52.3 1.11:1 HyGain 4 VB-64DX 0.59 7.55 6.59 5.16 13.45 10.50 10.36 4.94 3.87 12.40 10.06 10.16 11.3 55.0 1.03:1 Cushcraft A50-5S 0.59 7.60 6.52 5.11 13.53 10.56 10.46 4.89 3.83 12.52 10.09 10.19 14.0 40.8 1.05:1 DK7ZB 4 12.5 ohm 0.60 8.15 6.77 5.46 14.21 11.15 11.16 5.08 4.10 13.01 10.69 10.66 13.7 14.7 1.39:1 Directive 4 0.62 8.17 6.89 5.49 14.23 11.14 11.17 5.17 4.12 13.11 10.71 10.69 12.8 12.9 1.54:1 YU7EF 5C 0.69 7.99 6.52 5.08 13.97 10.96 10.91 4.89 3.81 12.84 10.50 10.47 16.8 50.1 1.03:1 DK7ZB 5 50 ohm 0.71 8.44 6.92 5.55 14.35 11.39 11.28 5.19 4.16 12.99 10.94 10.75 13.0 49.3 1.11:1 OZ3SW 4 (OZ6FRS) 0.73 7.79 6.43 4.97 13.49 10.71 10.43 4.82 3.73 12.67 10.32 10.30 15.0 31.7 1.10:1 G0kSC 5 4.4 LFA 0.73 8.47 6.88 5.48 14.55 11.45 11.53 5.16 4.11 13.49 11.01 11.02 21.5 49.9 1.08:1 DK7ZB 5 28 ohm 0.75 8.60 7.02 5.64 14.53 11.56 11.47 5.27 4.23 13.16 11.11 10.89 13.3 29.0 1.10:1 YU7EF 5A 0.75 8.59 6.97 5.64 14.51 11.54 11.12 5.23 4.23 13.07 10.91 10.84 12.9 49.4 1.06:1 N6CA 4 0.76 8.72 7.02 5.76 14.65 11.67 11.60 5.27 4.32 13.25 11.21 11.00 14.0 20.1 1.32:1 G0KSC 5 4.7m LFA 0.79 8.86 7.08 5.74 14.85 11.82 11.82 5.31 4.30 13.67 11.37 11.29 17.3 50.4 1.02:1 Telrex 5 0.80 8.88 7.24 5.98 14.82 11.83 11.78 5.43 4.49 13.39 11.37 11.09 13.0 20.3 1.28:1 I0JXX 5 0.81 9.03 7.53 6.33 14.98 11.98 11.95 5.65 4.24 13.24 11.49 11.11 10.5 18.1 1.37:1 W5WVO CC A50-5S MOD 0.87 9.10 7.35 6.09 15.19 12.07 12.16 5.51 4.57 13.65 11.57 11.34 12.3 16.1 1.36:1 Directive 5 0.88 8.93 7.02 5.76 14.86 11.87 11.84 5.42 4.32 13.62 11.45 11.24 16.6 23.4 1.09:1 Mē 6M5X 0.91 9.39 7.59 6.39 15.36 12.35 12.33 5.69 4.79 14.03 11.86 11.70 12.7 13.9 1.48:1 BQH 5 0.94 9.45 7.72 6.54 15.40 12.40 12.35 5.79 4.91 13.90 11.91 11.60 14.8 13.5 1.27:1 BV 6 0.98 9.47 7.72 6.56 15.45 12.43 12.40 5.79 4.92 14.08 11.96 11.73 15.3 47.6 1.13:1 YU7EF 6 W1 0.99 9.41 7.59 6.41 15.37 12.37 12.32 5.69 4.81 13.85 11.87 11.58 14.9 50.8 1.02:1 Cushcraft A50-6S 1.00 8.75 6.92 5.64 14.52 11.66 11.49 5.19 4.23 13.08 11.18 10.90 13.9 38.6 1.02:1 DK7ZB 5 18 ohm 1.00 9.36 7.65 6.47 15.32 12.32 12.28 5.74 4.86 13.70 11.82 11.37 12.3 17.7 1.35:1 G4CQM 6 1.00 9.51 7.59 6.41 15.50 12.48 12.46 5.69 4.81 14.12 12.00 11.75 14.3 53.5 1.28:1 DK7ZB 5 12.5 ohm 1.00 9.53 7.68 6.52 15.50 12.49 12.46 5.76 4.89 13.95 11.99 11.64 14.0 13.8 1.39:1 Mē 6M5XHG 1.03 9.87 8.05 6.95 15.86 12.84 12.81 6.04 5.21 14.44 12.35 12.05 17.6 11.0 1.58:1 *Mē 6M5XHG 1.03 9.87 5.49 5.49 14.35 12.15 12.18 -.-- -.-- --.-- --.-- --.-- 17.6 11.0 1.58:1 IZ1MYT 6 1.09 9.90 7.95 6.82 15.89 12.87 12.85 5.96 5.12 14.44 12.37 12.09 17.2 53.3 1.20:1 YU7EF 6 1.15 9.67 7.62 6.43 15.67 12.63 12.65 5.72 4.82 14.42 12.16 12.04 20.5 48.6 1.11:1 G0KSC 6 6.8m LFA 1.15 9.72 7.47 6.25 15.69 12.67 12.68 5.60 4.68 14.54 12.21 12.15 26.1 50.3 1.06:1 K6STI 5 1.15 10.32 8.27 7.24 16.26 13.26 13.25 6.20 5.43 14.85 12.75 12.51 17.0 12.5 1.67:1 DK7ZB 6 50 ohm 1.19 9.96 7.85 6.73 15.63 12.88 12.80 5.89 5.04 14.36 12.49 12.10 16.9 45.8 1.20:1 DK7ZB 6 28 ohm 1.20 10.19 8.12 7.02 16.15 13.15 13.13 6.09 5.27 14.79 12.65 12.44 18.0 27.2 1.07:1 HyGain VB-66DX 1.21 8.97 7.35 6.04 14.45 11.80 11.37 5.51 4.53 13.01 11.37 10.98 13.5 48.4 1.04:1 W1JR 6 1.21 9.47 7.35 6.17 15.39 12.39 11.39 5.51 4.63 13.88 11.89 11.60 17.9 45.1 1.08:1 Tilton 7 1.22 9.99 7.75 6.82 15.90 12.98 12.88 5.84 5.12 14.33 12.39 12.11 17.4 27.0 1.20:1 N6CA 6 1.22 10.08 7.91 6.80 16.05 13.03 13.03 5.94 5.10 14.80 12.55 12.44 18.9 22.1 1.17:1 G0KSC 6 7.3m LFA 1.22 10.15 7.88 6.77 16.11 13.10 13.10 5.91 5.08 14.86 12.61 12.51 22.1 51.3 1.05:1 I0JXX 6 1.23 10.27 8.66 7.65 16.25 13.23 13.23 6.49 5.74 14.73 12.67 12.36 11.2 15.7 1.52:1 N1DPM 5 Hy-gain mod 1.28 9.75 7.47 6.29 15.50 12.62 12.55 5.60 4.72 14.14 12.15 11.93 14.1 15.4 1.44:1 DK7ZB 7 50 ohm 1.29 10.12 8.05 7.00 16.09 13.07 13.05 6.04 5.25 14.52 12.55 12.23 20.0 45.5 1.03:1 N1DPM 7 KLM mod 1.31 10.02 7.91 6.84 15.84 12.90 12.82 5.94 5.13 14.18 12.39 12.04 16.9 205.0 1.04:1 YU7EF 7X 1.33 10.02 7.78 6.68 15.88 12.94 12.86 5.84 5.01 14.32 12.41 12.16 17.4 51.5 1.02:1 Mē 6M7 1.33 10.35 8.09 7.02 16.28 13.29 13.28 6.07 5.27 15.04 12.81 12.71 18.7 31.4 1.26:1 Mosley A507LS 1.42 8.11 6.73 5.43 13.71 11.21 10.99 5.03 4.07 13.22 10.92 11.00 13.4 41.8 1.07:1 YU7EF 7 1.49 10.58 8.20 7.18 16.49 13.51 13.48 6.15 5.39 15.01 12.99 12.76 19.0 49.8 1.03:1 G0KSC 7 8.9m LFA 1.49 10.70 8.27 7.24 16.66 13.65 13.66 6.20 5.43 15.54 13.19 13.15 24.9 49.4 1.08:1 Directive 7 1.56 10.92 8.50 7.47 16.86 13.87 13.86 6.37 5.60 15.68 13.40 13.30 20.2 23.8 1.14:1 DK7ZB 7 28 ohm 1.56 10.88 8.58 7.59 16.85 13.83 13.83 6.43 5.69 15.48 13.33 13.14 20.9 27.7 1.15:1 Mē 6M7JHV 1.56 10.86 8.42 7.41 16.78 13.79 13.78 6.32 5.56 15.43 13.30 13.13 20.8 30.1 1.32:1 I0JXX 7 1.57 11.38 9.42 8.54 17.37 14.34 14.38 7.07 6.40 16.03 13.80 13.64 13.5 30.2 2.00:1 K6STI 6 1.62 11.17 9.38 7.98 17.13 14.16 14.09 7.03 5.99 15.61 13.62 13.23 17.2 18.1 1.47:1 G0KSC 7 9.7m LFA 1.63 11.02 8.50 7.50 16.94 13.95 13.94 6.38 5.63 15.67 13.46 13.35 23.9 50.3 1:06:1 Cushcraft 617-6B 1.69 10.17 8.09 7.08 15.89 13.01 12.90 6.07 5.31 13.99 12.48 11.95 19.1 33.0 1.16:1 N1DPM 7 617-6B mod 1.69 10.94 8.34 7.35 16.85 13.87 13.86 6.26 6.51 15.59 13.38 13.29 23.9 20.7 1.26:1 YU7EF 8 1.88 11.29 8.70 7.75 17.20 14.21 14.20 6.53 5.81 15.85 13.70 13.58 21.9 49.0 1.11:1 K5GW 8 1.96 11.77 9.52 8.70 17.78 14.73 14.76 7.14 6.53 16.26 14.15 13.95 19.8 52.9 1.13:1 BQH 8 2.00 11.95 9.62 8.74 17.94 14.91 14.93 7.22 6.56 16.49 14.36 14.18 21.7 50.1 1.18:1 Mē 6M2WLC 2.00 11.76 9.28 8.38 17.67 14.68 14.68 6.96 6.27 16.19 14.14 13.96 20.4 35.8 1.27:1 DK7ZB 8 2.05 11.83 9.33 8.46 17.75 14.76 14.76 7.00 6.34 16.29 14.21 14.03 23.0 27.1 1.16:1 K6STI 7 2.05 12.12 9.94 9.14 18.10 15.05 15.11 7.46 6.86 16.52 14.45 14.26 18.7 13.7 1.76:1 N6CA 8 2.07 11.95 9.52 8.66 17.89 14.88 14.91 7.14 6.49 16.53 14.36 14.23 20.0 21.5 1.20:1 G0KSC 8 12.49m LFA 2.09 11.92 9.33 8.42 17.84 14.86 14.85 7.00 6.32 16.61 14.37 14.28 24.8 49.9 1.12:1 YU7EF 9 2.16 11.84 9.14 8.27 17.74 14.75 14.76 6.85 6.20 16.44 14.25 14.16 21.0 48.9 1.08:1 Mē 6M8GJ 2.18 12.12 9.68 8.42 17.98 15.05 14.99 7.26 6.32 16.48 14.50 14.27 18.3 16.4 1.15:1 ZL3NW 10 2.20 11.68 9.18 8.34 17.62 14.61 14.66 6.89 6.26 16.22 14.08 13.90 16.4 62.1 1.13:1 BQH 9 2.28 12.19 10.17 9.28 18.24 15.18 15.21 7.63 6.96 16.76 14.59 14.39 22.1 50.9 1.14:1 DK7ZB 9 2.34 12.26 9.94 9.09 18.25 15.22 15.24 7.46 6.82 16.80 14.66 14.50 21.0 28.3 1.10:1 Mē 6M9KHW 2.51 12.72 10.53 9.73 18.72 15.68 15.71 7.90 7.30 17.33 15.12 15.01 20.5 20.7 1.21:1 K6STI 8 2.54 12.73 10.72 10.00 18.78 15.67 15.75 8.04 7.50 17.12 15.04 14.89 18.0 17.5 1.65:1 Mē 6m25WLC 2.57 12.63 10.41 9.68 18.65 15.58 15.64 7.80 7.26 17.27 15.04 14.95 20.2 28.8 1.30:1 YU7EF 10 2.59 12.50 10.06 9.14 18.44 15.45 15.45 7.54 6.85 17.36 15.00 14.94 22.8 50.5 1.07:1 Mē 6M11JKV 3.52 13.99 11.94 11.33 19.92 16.92 16.93 8.96 8.50 18.67 16.38 16.36 19.4 27.3 1.25:1 BVO 18 Rope Yagi 5.03 15.01 13.39 12.81 20.95 17.95 17.95 10.05 9.61 19.66 17.39 17.37 25.3 52.4 1.11:1 Notes: 1. All antennas are now calculated in Eznec5+ by by W7EL, Roy Lewallen. 2. All antennas are in free space and horizontally polarized. 3. One wavelength at 50.150 MHz is 5.98M or 19.62' 4. "E" represents the horizontal plane; "H" represents the vertical plane. 5. F/R is Front to Rear in dB over the rear 180 degrees of an antenna using either E or H plane. 6. Z ohms is the natural impedence of a single antenna in free space. 7. VSWR Bandwidth is based a single antenna over 50.00 - 50.300 MHz with a reference of 1.00:1 at 50.150 MHz 8. G/T is not included in this table as the ratio between cold sky and ground noise is small. ie 2400K cold sky versus 3000 - 4000K ground noise. Therefore, G/T does not produce useful results on this band. Very Low side lobes and F/R on this band produce no specific improvement in G/T based on pure sky noise and ground noise. Assuming reasonable side lobes, F/R and good VSWR bandwidth, Gain is the most critical parameter on 6M. 9. Antennas marked with a "*" have stacking dimensions recommended by the manufacturer or designer. 10. Force 12 or Create antennas are not included as no data is available from the manufacturers. Using this Chart: While Gain is very important on on this band, other factors like ease of matching and wet weather performance should be considered in the your decision making. Antennas with 50 ohm feed systems and good VSWR bandwidth (Q) may be the best choice depending on your location. Although there is no advantage to low sidelobe and F/R antennas based on sky noise and ground noise (G/T) these antennas may provide signifcant benefit if you have local man made noise that is in directions where low side lobe antennas provide additional suppression. Stacking is an issue on this band due to the large optimum spacings. While the longer antennas are very attractive because of there superior gain, if severly understacked, the gain advantage may be quickly lost. LIONEL H. EDWARDS VE7BQH ve7bqh@shaw.ca Issue 7 February 6,2010 Issue 1: Initial Issue Issue 2: Add Cushcraft 617-6B and Mē 6M25WLC Issue 3: Add N1DPM 7 617-6b mod, N1DPM 7 KLM mod, N1DPM 5 Hy-gain mod Issue 4: Add G0KSC 6 6.8m LFA,G0KSC 6 7.3m LFA,G0KSC 7 9.7m LFA,G0KSC 7 8.9m LFA,G0KSC 8 12.49m LFA Issue 5: Add G4CQM 6, G0KSC 5 4.4m LFA, Add F/R column Issue 6: Add Mē 6M3 Issue 7: Add Mē 6M5XHG, IZ1MYT 6