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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