Home                  
my account: Log In

10Db WLAN Yagi

Some information on a 13cm Yagi FRARS members have been developing.

Written by: G4RFR ( FRARS ) Saturday, 13 April 2002

Click for full size imageFor point to point WLAN applications, often a yagi provides a simple and low-cost solution at the antenna side of things. FRARS members have been developing a yagi over the past few months.

Using Yagi design software mainly intended for the amateur radio community, this antenna has been modeled and tweaked.

The inset picture shows an initial production of 5 Yagi element sets. We decided that it would have to be simple to build with a minimum of fuss, and have repeatable results. The feeding of this antenna is an issue at the moment, and we are working to create a simple feed design.

Feeds that have been sucessfully tried include the folded dipole, with ut141 matching harness and a feed similar to the hb9cv antenna.

Another feed possibility is using an etched PCB antenna, but this is under investigation as PCB is lossy at 2.45Ghz.

The picture below shows a polar plot made during the development of the initial antenna. Carl, G6NLC has developed software and hardware to automagically create a polar plot of any antenna.

The polar plotting device will be a feature of the FRARS Wireless LAN antenna testing day.

Now we have established a simple yagi design, this can be scaled to other frequencies.

Phoenix Precision Engineering based in Poole kindly manufactured the initial run of antennas for us at a very reasonable price! Thanks go to them.

Links:

  • Phoenix Precision Engineering - Poole [Click here]
  • More FRARS Wireless LAN articles [Click here]

  • Attachments: (Click to view/download):
         
    13cm yagi2.jpg      

    Email author | Link to this page | Print | Log In

    FRARS Features

    FRARS Clothing

    Get your FRARS sweatshirt, polo shirt or cap embroidered with your callsign!


    Getting Licensed
    FRARS runs regular courses to help you prepare for your amateur radio licence.
    For more information Click here

    UK Microwave Group

    In early 2004 the UK Microwave Group (UKuG) became the representative voice of the UK amateur radio microwave en­thusiast after the RSGB disbanded its own Microwave
    Committee.

    Official website:

    Microwavers.org

    © Copyright 2001-2013 Flight Refuelling Amateur Radio Society.