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- YBN 3+7 SATA Satellite Yagi with 3 ele. for 145 MHz + 7 ele. for 435 MHz for handheld use
Elevation Plots
- YBN 2-2wA 50 ohms direct feed 2 ele. Yagi with high potential as broad beam Contest Stack.
See yourself and compare to DJ9HO Double Quads and 7ZB Oblongs. Full details on 2 and 4 Yagi stacks are given
3D Pattern of 4 x Stack
- YBN 2-5m (5-8)1.6 m high F/R, good willing 50 ohms direct feed Yagi as introduced with bent DE short version of the 5-8 in Dubus 4/2012
Elevation Plot
- YBN 2-6m 1.9 m long, good willing 50 ohms direct feed Yagi, related to the 5-8 project (same positions refl, dipole, D1, D2 ... same size folded dipole)
Elevation Plot
- YBN 2-7m 2.8 m high F/R, good willing 50 ohms direct feed Yagi, related to the 5-8 project (same positions refl, dipole, D1, D2 ... same size folded dipole)
Elevation Plot
- YBN 2-8m (5-8)3.6 m nice G/T, good willing 50 ohms direct feed Yagi as introduced with bent DE expanded version of the 5-8 in Dubus 4/2012
Actually it seems to be so good that DK7ZB decided to use it as draft for the 8 ele. OWM he just published.
Elevation Plot
- YBN 2-8mz3.6 m 25/28 ohms version of the YBN 2-8m
The stacked 25 ohms Yagi can easily be phased with 50 ohms coax cables
Elevation Plot
- YBN 2-9m4.5 m moderate band width, low Antenna Temperature, good willing 50 ohms direct feed Yagi - a straigh DE version twin to the GTV 2-9m
Elevation Plot
- YBN 2-10w (5-8)5 m wide band, good willing 50 ohms direct feed Yagi as introduced with straight DE expanded version of the 5-8 in Dubus 4/2012
Elevation Plot
- GTV 2-6m2.4 m moderate band width version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-7w2.7 m wide band width version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-7n3.1 m narrow band, max. G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-8w3.7 m wide-band, still good G/T and nice F/B version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-8n3.8 m narrow band, max. G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-9n4.3 m narrow band, balanced between low Antenna Temp. and G/T version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-9m4.5 m moderate band width, low Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- YBN 2-10w 12.5 Ω5.1 m - 144.0 to 144.8 MHz wide band 12 ohms OWL-style Low Noise Yagi with straight DE and very low back lobes only
Elevation Plot
- GTV 2-10LT5.1 m moderate band width, lowest Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-11LT6.0 m moderate band width, lowest Antenna Temp. version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- YBN 2-12w 12.5 Ω6.8 m wide band 12 ohms OWL-style Low Noise Yagi with straight DE and very low back lobes only
Azimuth Plot:
- GTV 2-12m mk2Improved 6.8 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot:
- GTV 2-12n6.8 m narrow band version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot:
- GTV 2-14w8.4 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-16w10 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-18w11.7 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- GTV 2-19m12.4 m version of the low impedance, yet 50 ohms direct feed Low Noise Yagi with bent DE introduced in Dubus 1/2013
Elevation Plot
- YBN 3+7 SAT
Performance Data and Geometry Pattern and VSWR Download as File StackingGTV 2-16w Yagi with bent Driven Element
144 to 146 MHz Wideband Antenna Version (OWA style)
This Yagi has very low back lobes for its length. It may serve as a single powerful antenna for Tropo and EME
or make a quiet contest antenna due to its high F/B. The bent DE (K6STI style) transforms from approx. 17 ohms to 50 ohms at feed point.
Current distribution
2015-04-17: Nice photos of
GTV 2-16w and 
GTV70-23 m at SP8MRD on qrz.com
Performance Data
ele. 4 mm ele. 8 mm
Gain vs. isotr. Rad. 16.9 dBi 16.9 dBi
Gain vs. Dipole 14.7 dBD 14.7 dBD
-3 dB E-plane 27.4 deg. 27.4 deg.
-3 dB H-plane 28.8 deg. 28.6 deg.
F/B -33.8 dB -28.6 dB
F/R -27.5 dB -27.4 dB
Impedance 50 ohms =
Mechan. Length 9870 mm =
Electr. Length 4.74 λ
Stacking Dist. h-pol. DL6WU max. G/T
top-to-bottom 3.62 m 4.45 m
side-by-side 3.87 m 4.60 m
Geometry
Pos. 1/2 Length 1/2 Length Full Length Full Length incl. BC & SBC
in NEC in NEC Free Space Free Space on 25x25 Boom
Refl. 0 5xx.0 510.0 1025.0 1020.0 1029.9
DE(b) 215 100-4xx 100-491 982.0 982.0 991.9
DE(a) 274 0-100 0-100 100.0 100.0 100.0
D1 405 4xx.5 480.5 975.0 961.0 970.9
D2 690 4xx.0 474.5 963.4 949.0 958.9
D3 1236 4xx.0 462.5 942.0 925.0 934.9
D4 1874 4xx.0 455.5 930.0 911.0 920.9
D5 2615 4xx.0 448.0 917.0 896.0 905.9
D6 3407 4xx.0 444.25 910.0 888.5 898.4
D7 4227 4xx.0 438.0 898.0 876.0 885.9
D8 5072 4xx.0 436.0 895.0 872.0 881.9
D9 5927 4xx.0 433.5 890.0 867.0 876.9
D10 6762 4xx.0 429.0 882.0 858.0 867.9
D11 7585 4xx.0 427.0 878.0 854.0 863.9
D12 8404 4xx.0 426.0 877.0 852.0 861.9
D12 9190 4xx.0 423.0 872.0 846.0 855.9
D14 9870 4xx.0 416.0 858.0 832.0 841.9
ele. 1/4" ele. 8 mm ele. 4 mm ele. 8 mm ele. 8 mm
4 mm elements insulated through boom BC:
(1.) add the 2.3 mm of SBC as shown below
(2.) Use DJ9BV BC numbers and nylon rivets on square boom as shown on BC-page
(3.) ... or SM5BSZ's BC.exe for even more accuracy or other insulators
On Boom BC:
SegmentationBC = +2.3 mm = (144.7 MHz - 144.3 MHz) * 5.85 mm/MHz
BaseBC (25x25) = +7.6 mm for semi-insulated on boom
Total = +9.9 mm
Note: element lengths for Ø 8 mm fit 5/16" too
The Drivers diameter is 10 mm for all examples.
Use EZNEC's Auto-Segmentation at 350 MHz.
Sketch of Driver Cell:
Pattern and VSWR Plots
Elevation and Azimuth plot at 144.1 MHz
SWR and Return Loss plots - simulated with 4nec2
Downloads
EZNEC file of this Yagi
EZNEC file of this Yagi as over stacked 4 bay (max. G/T)
Stacking
Stacking Dist. DL6WU Formula max. G/T H-plane 4.21 m 4.45 m E-plane 4.39 m 4.60 m
Elevation plot and data of 4 Yagi bay using DL6WU stacking distances
Gain vs. isotr. Rad. 22.85 dBi Gain vs. Dipole 20.70 dBD -3 dB H-plane 12.4 deg. -3 dB E-plane 13.0 deg. F/B -36.0 dB F/R -28.9 dB T_ant 221.4 K* G/T -0.60 dB*Theoretical numbers, no phasing line losses
nor imperfections caused by H-frame included
*) T_sky = 200 K, T_earth = 1000 K as in VE7BQH G/T table
Elevation plot and data of 4 Yagi bay using distances for max. G/T
Gain vs. isotr. Rad. 22.94 dBi Gain vs. Dipole 20.79 dBD -3 dB H-plane 12.0 deg. -3 dB E-plane 12.2 deg. F/B -34.1 dB F/R -28.9 dB T_ant 222.4 K* G/T -0.53 dB*Theoretical numbers, no phasing line losses
nor imperfections caused by H-frame included
*) T_sky = 200 K, T_earth = 1000 K as in VE7BQH G/T table
73, Hartmut, DG7YBN