yagi designs
TRANSCRIPT
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Yagi Antenna Designs and Measurements
Table of Contents
Introduction Page 2
850 Mhz Antennas
• Audionut’s 10.5 db gain 5 element Page 4
• Perite’s 13 db gain 8 element Page 6
• Audionut’s 14.5 db gain 11 element Page 8
• Audionut’s 16.5 db gain 20 element Page 10
900 Mhz Antennas
• Perite’s 13 db gain 8 element Page 13
• Audionut’s 16 db gain 15 element Page 15
1800 Mhz Antennas
• Wombo’s 14 db gain 11 element Page 18
• Audionut’s 10.5 db gain 5 element Page 20
1900 Mhz Antennas
• Audionut’s 16.9 db gain 19 element Page 23
2100 Mhz Antennas
• Audionut’s 16.5 db gain 19 element Page 26
• Experiment 626’s 12 db gain 11 element Page 28
• Audionut’s 14 db gain 11 element Page 29
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Introduction
• This is a collection of all Yagi antenna designs that have appeared in the Whirlpool
forum thread Homemade NextG Yagi.
The above graphic is a representation of a basic yagi antenna with 5 elements. The number of
Director elements will vary according to the antenna design.
Distance measurements are given as the distance of each element from the Reflector element
and not from the previous element.
All measurements are in millimeters
Unless otherwise noted, all antennas use an element diameter of 10 mm.
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850 Mhz Yagi Antennas
• Audionut’s 10.5 db gain 5 element Page 4
• Perite’s 13 db gain 8 element Page 6
• Audionut’s 14.5 db gain 11 element Page 8
• Audionut’s 16.5 db gain 20 element Page 10
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Audionut’s 10.5 db gain 5 element 850 mhz Yagi
Element # Element Width in mm Distance from Reflector in mm
Reflector 170 0
Driven 160 86
Director 1 140 148
Director 2 140 245
Director 3 133 337
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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Perite’s 13 db gain 8 element 850 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 168 0
Driven 154 74
Director 1 140 124
Director 2 136 202
Director 3 136 314
Director 4 130 428
Director 5 128 549
Director 6 126 670
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Polar plots - Antenna Gain
Return loss – SWR
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Audionut’s 14.5 db gain 11 element 850 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 176 0
Driven 163 80
Director 1 146 124
Director 2 140 204
Director 3 137 314
Director 4 135 430
Director 5 133 548
Director 6 132 670
Director 7 129 805
Director 8 128 930
Director 9 122 1045
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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Audionut’s 16.5 db gain 20 element 850 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 173 0
Driven 170 75
Director 1 148 99
Director 2 145 146
Director 3 141 214
Director 4 137 305
Director 5 134 415
Director 6 133 521
Director 7 131 631
Director 8 130 732
Director 9 128 834
Director 10 127 935
Director 11 126 1041
Director 12 126 1146
Director 13 124 1244
Director 14 124 1344
Director 15 124 1446
Director 16 122 1544
Director 17 122 1646
Director 18 122 1746
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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900 Mhz Yagi Antennas
• Perite’s 13 db gain 8 element Page 13
• Audionut’s 16 db gain 15 element Page 15
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Perite’s 13 db gain 8 element 900 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 161 0
Driven 148 71
Director 1 134 119
Director 2 131 194
Director 3 131 302
Director 4 125 411
Director 5 123 527
Director 6 121 644
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Polar plots - Antenna Gain
Return loss – SWR
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Audionut’s 16 db gain 15 element 900 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 157 0
Driven 156 82
Director 1 137 112
Director 2 132 172
Director 3 127 250
Director 4 125 331
Director 5 124 425
Director 6 123 539
Director 7 122 644
Director 8 120 762
Director 9 120 859
Director 10 118 954
Director 11 118 1062
Director 12 118 1183
Director 13 118 1277
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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1800 Mhz Yagi Antennas
• Wombo’s 14 db gain 11 element Page 16
• Audionut’s 10.5 db gain 5 element Page 18
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Wombo’s 14 db gain 11 element 1800 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 88 0
Driven 84 36
Director 1 67 52
Director 2 63 87
Director 3 62 131
Director 4 61 172
Director 5 60 222
Director 6 59 278
Director 7 59 335
Director 8 59 394
Director 9 53 443
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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Audionut’s 10.5 db gain 5 element 1800 mhz Yagi
Element # Element Width in mm Distance from Reflector in mm
Reflector 88 0
Driven 86 47
Director 1 68 65
Director 2 64 100
Director 3 61 144
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Polar plots - Antenna Gain
Return loss – SWR
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1900 Mhz Yagi Antennas
• Audionut’s 16.9 db gain 19 element Page 23
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Audionut’s 16.9 db gain 19 element 1900 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 86 0
Driven 77 26
Director 1 59 39
Director 2 57 62
Director 3 53 93
Director 4 53 122
Director 5 52 161
Director 6 51 208
Director 7 50 249
Director 8 50 293
Director 9 50 342
Director 10 50 392
Director 11 50 446
Director 12 50 501
Director 13 49 558
Director 14 49 619
Director 15 49 676
Director 16 48 734
Director 17 45 790
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Polar plots - Antenna Gain
Return loss – SWR
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2100 Mhz Yagi Antennas
• Audionut’s 16.5 db gain 19 element Page 26
• Experiment 626’s 12 db gain 11 element Page 28
• Audionut’s 14 db gain 11 element Page 29
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Audionut’s 16.5 db gain 19 element 2100 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 74 0
Driven 70 26
Director 1 59 38
Director 2 57 64
Director 3 54 96
Director 4 53 131
Director 5 53 170
Director 6 51 217
Director 7 50 260
Director 8 50 306
Director 9 50 356
Director 10 50 407
Director 11 49 460
Director 12 49 516
Director 13 49 573
Director 14 48 630
Director 15 48 687
Director 16 48 746
Director 17 46 802
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red
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Experiment 626’s 12 db gain 11 element 2100 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 216 0
Driven 68 32
Director 1 56 55
Director 2 53 87
Director 3 50 155
Director 4 50 200
Director 5 48 269
Director 6 47 316
Director 7 47 392
Director 8 49 448
Director 9 51 491
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Audionut’s Tweaked 14 db gain 11 element 2100 mhz Yagi
Element # Element width in mm Distance from Reflector in mm
Reflector 209 0
Driven 73 32
Director 1 58 48
Director 2 53 83
Director 3 53 137
Director 4 51 188
Director 5 51 245
Director 6 50 295
Director 7 48 362
Director 8 52 415
Director 9 49 459
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Polar plots - Antenna Gain
Return loss – SWR
Gain - Forward Gain is blue, Front to Back ratio is red