DIY Antenna 2.4 GHz, 5.8 GHz: Difference between revisions

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Use https://www.k7mem.com/Ant_Yagi_VHF_Quick.html to get the dimensions.
Use https://www.k7mem.com/Ant_Yagi_VHF_Quick.html to get the dimensions.
NanoVNA works only till 900MHz, so these antennas cannot be verified.
My RTL-SDR works only to about 1.7 GHz. So, hackRF or similar is needed.


=== 2.4 GHz band ===
=== 2.4 GHz band ===
14 channels are designated in the 2.4 GHz range, spaced 5 MHz apart from each other except for a 12 MHz space before channel 14.
* Many of the cordless telephones and baby monitors
* Bluetooth  2.4 to 2.4835 GHz. The Bluetooth protocol divides the band into 80 channels (numbered from 0 to 79, each 1 MHz wide
* Zigbee  2.4–2.4835 GHz band. The definition is for 16 channels.
* Some wireless peripherals like keyboard, microphone, speakers,
* Microwave oven 2.4 GHz
* RC
* Garage doors
* Car alarm
* Some radars.
* Some wireless power transmission uses the 2.4 GHz band.


=== 5.8 GHz band ===
=== 5.8 GHz band ===
Line 58: Line 76:
* Suggested Stacking Distance for 2 Yagis:122.4mm Horizontally, 109.9mm Vertically
* Suggested Stacking Distance for 2 Yagis:122.4mm Horizontally, 109.9mm Vertically
* Dimensional tolerance required = 0.37mm
* Dimensional tolerance required = 0.37mm


{| class="wikitable"  
{| class="wikitable"  
Line 65: Line 82:
! Spacing [mm]
! Spacing [mm]
! Length [mm]
! Length [mm]
!
!
|-
|-
| Refl
| Refl
| 0
| 0
| 60.18
| 60.18
|
|
|-
|-
| Driven
| Driven
| 24.98
| 24.98
| 58.44
| 58.44
|
|
|-
|-
| D1
| D1
| 34.35
| 34.35
| 51.37
| 51.37
|
|
|-
|-
| D1
| D1
| 56.84
| 56.84
| 50.51
| 50.51
|
|
|-
|-
| D3
| D3
| 83.69
| 83.69
| 49.67
| 49.67
|
|
|}
|}


=== Large Gain ===
=== Large Gain ===
https://www.instructables.com/Easy-to-Build-WIFI-24GHz-Yagi-Antenna/


== 5.8 Yagi ==
== 5.8 Yagi ==


=== Small Gain ===
=== Small Gain ===
Design Information
* 5800 MHz, 5 Elements, 7.842 dBd Estimated Gain
* 52.0 Degrees Horizontal Beam Width
* 58.0 Degrees Vertical Beam Width
* 1.25 mm Diameter Metalic Boom, Bonded Elements.
* Boom Correction of 0.4754 applied.
* Electrical Boom Length of 40.0mm.
* Allow for overhang when cutting boom to length.
* Driven Element Diameter = 1.00mm, Parasitic Element Diameter = 1.00mm,
* Suggested Stacking Distance for 2 Yagis:50.7mm Horizontally, 45.5mm Vertically
* Dimensional tolerance required = 0.16mm
{| class="wikitable"
|-
! Element
! Spacing [mm]
! Length [mm]
|-
| Refl
| 0
| 25.5
|-
| Driven
| 10.3
| 24.2
|-
| D1
| 14.2
| 21.8
|-
| D2
| 23.5
| 21.5
|-
| D3
| 34.6
| 21.1
|}


=== Large Gain ===
=== Large Gain ===
Design Information
* 5800 MHz, 11 Elements, 12.293 dBd Estimated Gain
* 35.5 Degrees Horizontal Beam Width
* 37.3 Degrees Vertical Beam Width
* 1.25 mm Diameter Metalic Boom, Bonded Elements. Boom Correction of 0.4754 applied.
* Electrical Boom Length of 130.2mm.
* Driven Element Diameter = 1.00mm, Parasitic Element Diameter = 1.00mm
* Suggested Stacking Distance for 2 Yagis:74.2mm Horizontally, 70.6mm Vertically
* Dimensional tolerance required = 0.16mm
{| class="wikitable"
|-
! Element
! Spacing [mm]
! Length [mm]
|-
| Refl
| 0
| 25.5
|-
| Driven
| 10.3
| 24.2
|-
| D1
| 14.2
| 21.8
|-
| D1
| 23.5
| 21.5
|-
| D3
| 34.6
| 21.1
|-
| D4
| 47.6
| 20.8
|-
| D5
| 62.0
| 20.5
|-
| D6
| 77.5
| 20.3
|-
| D7
| 93.8
| 20.1
|-
| D8
| 110.9
| 19.9
|-
| D9
| 128.7
| 19.8
|}

Latest revision as of 15:21, 27 May 2026

Introduction

  • Frequency  : 5800 MHz
  • Wavelength  : 52 mm

Use https://www.k7mem.com/Ant_Yagi_VHF_Quick.html to get the dimensions.

NanoVNA works only till 900MHz, so these antennas cannot be verified.


My RTL-SDR works only to about 1.7 GHz. So, hackRF or similar is needed.

2.4 GHz band

14 channels are designated in the 2.4 GHz range, spaced 5 MHz apart from each other except for a 12 MHz space before channel 14.

  • Many of the cordless telephones and baby monitors
  • Bluetooth 2.4 to 2.4835 GHz. The Bluetooth protocol divides the band into 80 channels (numbered from 0 to 79, each 1 MHz wide
  • Zigbee 2.4–2.4835 GHz band. The definition is for 16 channels.
  • Some wireless peripherals like keyboard, microphone, speakers,
  • Microwave oven 2.4 GHz
  • RC
  • Garage doors
  • Car alarm
  • Some radars.
  • Some wireless power transmission uses the 2.4 GHz band.

5.8 GHz band

Uses orthogonal frequency division multiplexing (OFDM) technology and point-to-multipoint and point-to-point networking, and the rate of single sector is up to 54Mbps.

The bypass ability is poorer, and the transmission bandwidth is smaller than 2.4GHz.

  • 5GHz WiFi signal uses frequency between 5170MHz – 5835MHz
  • High-speed wireless LAN
  • Broadband wireless access system
  • Bluetooth technology equipment
  • Vehicle wireless automatic identification system.

The common analog bands are A, B, E, F and R. See https://oscarliang.com/fpv-channels/ for more information.

Channel Spectrum Width (Channel Bandwidth): 40MHz

  • 42: 5210MHz 5.21GHz
  • 50: 5250MHz 5.25GHz
  • 58: 5290MHz 5.29GHz
  • 152: 5760MHz 5.76GHz
  • 160: 5800MHz 5.8GHz

Channel Spectrum Width: 20MHz

  • 36: 5180MHz 5.18GHz
  • 40: 5200MHz 5.2GHz
  • 44: 5220MHz 5.22GHz
  • 48: 5240MHz 5.24GHz
  • 52: 5260MHz 5.26GHz
  • 56: 5280MHz 5.28GHz
  • 60: 5300MHz 5.3GHz
  • 64: 5320MHz 5.32GHz
  • 149: 5745MHz 5.745GHz
  • 153: 5765MHz 5.765GHz
  • 157: 5785MHz 5.785GHz
  • 161: 5805MHz 5.805GHz
  • 165: 5825MHz 5.825GHz

2.4 Yagi

Small Gain

Design Information

  • 2400 MHz, 5 Elements, 7.842 dBd Estimated Gain
  • 52.0 Degrees Horizontal Beam Width
  • 58.0 Degrees Vertical Beam Width
  • 0.79" Diameter Non-Metalic Boom, Insulated Elements. No Boom Correction applied.
  • Driven Element Diameter = 2.4mm
  • Parasitic Element Diameter = 2.4mm
  • Suggested Stacking Distance for 2 Yagis:122.4mm Horizontally, 109.9mm Vertically
  • Dimensional tolerance required = 0.37mm
Element Spacing [mm] Length [mm]
Refl 0 60.18
Driven 24.98 58.44
D1 34.35 51.37
D1 56.84 50.51
D3 83.69 49.67

Large Gain

https://www.instructables.com/Easy-to-Build-WIFI-24GHz-Yagi-Antenna/

5.8 Yagi

Small Gain

Design Information

  • 5800 MHz, 5 Elements, 7.842 dBd Estimated Gain
  • 52.0 Degrees Horizontal Beam Width
  • 58.0 Degrees Vertical Beam Width
  • 1.25 mm Diameter Metalic Boom, Bonded Elements.
  • Boom Correction of 0.4754 applied.
  • Electrical Boom Length of 40.0mm.
  • Allow for overhang when cutting boom to length.
  • Driven Element Diameter = 1.00mm, Parasitic Element Diameter = 1.00mm,
  • Suggested Stacking Distance for 2 Yagis:50.7mm Horizontally, 45.5mm Vertically
  • Dimensional tolerance required = 0.16mm


Element Spacing [mm] Length [mm]
Refl 0 25.5
Driven 10.3 24.2
D1 14.2 21.8
D2 23.5 21.5
D3 34.6 21.1

Large Gain

Design Information

  • 5800 MHz, 11 Elements, 12.293 dBd Estimated Gain
  • 35.5 Degrees Horizontal Beam Width
  • 37.3 Degrees Vertical Beam Width
  • 1.25 mm Diameter Metalic Boom, Bonded Elements. Boom Correction of 0.4754 applied.
  • Electrical Boom Length of 130.2mm.
  • Driven Element Diameter = 1.00mm, Parasitic Element Diameter = 1.00mm
  • Suggested Stacking Distance for 2 Yagis:74.2mm Horizontally, 70.6mm Vertically
  • Dimensional tolerance required = 0.16mm


Element Spacing [mm] Length [mm]
Refl 0 25.5
Driven 10.3 24.2
D1 14.2 21.8
D1 23.5 21.5
D3 34.6 21.1
D4 47.6 20.8
D5 62.0 20.5
D6 77.5 20.3
D7 93.8 20.1
D8 110.9 19.9
D9 128.7 19.8
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