PowAbeam Antennas offer a range of high-performance VHF and UHF Yagi antennas conceived by Derek Hilleard (G4CQM) and hand-built to order by The DX Shop in the UK.
Advanced Optimized Wideband Antenna (AOWA) style and low-Q Yagis, designed for wider bandwidth and improved stability during rain, snow, or wet weather conditions.
Derek is one of the very few Radio Amateurs to own the powerful design software from Brian Beezley (K6STI) both YO7 and AO 'professional' versions.
1926 came invention of the Yagi-Uda Antenna, a major breakthrough in VHF/UHF communication.
In a recent paper written by Kunio Sawaya
(Department of Communications Engineering), Tohoku University (Japan), describes a typical concept design of that time. It had three reflector elements, one exciter and twenty director elements. it was centered on 68MHz...
| Concept Yagi-Uda seen in AOP | Concept Yagi-Uda Characteristics |
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| Concept Yagi-Uda Azimuth | Concept Yagi-Uda Elevation |
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For several decades now radio enthusiasts have made efforts to refine yagi designs using a range of tools. Pioneering amateurs like Günter Hoch had access to a test range belonging to the German Post Office. He carried out extensive tests on VHF/UHF yagi designs in a bid to quantify his measurements and make improvements. This led to a range of DL6WU designs which were adopted widely across the globe.
