Homebrew Sector Antenna for Wifi ISM band (2,4GHz)



Properties
  • Frequency 2,4 to 2,5GHz
  • Impedance 50 Ohm @ 2,45GHz
  • VSWR <>
  • Polarisatie Verticaal
  • Vertical beamwidth (-3dB) 15º
  • Horizontal beamwidth (-3dB) 125º
  • Connector: Female-N type (50 Ohm)
  • The design was published by Dragoslav 
most of his work is in Serbian, but we have corresponded in English. He and I differ a little about he dimensions of his AMOS antenna. When I build the antenna as he describes, it usually has best VSWR below the Wifi band, so I shortened it a little.

This antenna is suitable for use in Computer Radio LANs conforming to the IEEE 802.11b/g standard – better known as Wifi. It can be used on an Access Point (or wireless Router) or Wifi client with equal benefits. Principle The antenna is a centre-fed broadside array antenna, based on the Franklin Antenna as published in Rothammels Antennebuch (shown on the right) This is the complete design in Serbian as published by YU1AW: Amos.zip (3,7MB),

This is my version of his design. Overall, the dimensions are a little shorter: