Here’s a nice project that gives the builder great performance on 2 bands. A 5 element OWA Yagi with over 9dbi on 11m and 9.82dbi on 10m giving great performance. Front to back is around 19.5db on 11m and over 26db on 10m. This antenna was used at G0UIH from 2007 until 2012.
The antenna is built using a 60mm x 60mm x 4mm wall centre boom section and 50mm x 50mm x 3mm box section for the outer boom sections which telescope into the centre section. 2 inch box section with a 10 gauge wall could be used as an alternative for the two outer sections [pertinent for UK builders].
Data Sheet and EZNEC File:
Click on the image below to download a PDF of the data sheet – or to download a copy of the EZ-NEC file, click here. We’d note that the SWR shown on the EZNEC file is not the same as experienced in the ‘Real-World’. Use the info on the data sheet as we got a super wide-banded SWR plot using the data below.
Tube Sizes [EU/Metric]:
20mm x 1.5mm
16mm x 1.5mm
12mm x 1.5mm [Inner diameter not important]
Tube Sizes [UK/Imperial]:
20mm x 1.5mm [No direct imperial equivalent] – Simmal [Preston UK have stock]
15.88mm x 1.219mm [5/8ths x 18SWG]
12.7mm x 1.65mm [1/2inch x 16SWG] [Inner diameter not important]
