DIY Antenna 2.4 GHz, 5.8 GHz

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