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Welcome, my name is Derek Hilleard and my Amateur Radio callsign is G4CQM.
I have recently retired, previously self-employed as a professional Antenna Design Engineer for the radio and telecommunications industry.
This website domain was used in the past for my Antenna Designer UK consultancy, see NEWS page!
During the last five years I have been engaged in a private research project focusing on specialist yagi antenna designs for the VHF/UHF Ham Radio bands.
The project is still ongoing, my goal is to design the best possible yagi antennas!
I'm striving to perfect the 50-Ohm yagi not reinvent it!
I use a wide range of software and spreadsheet tools.
Several enthusiasts have supported me by building and testing my designs in countries all around the world and in different climatic conditions. You can see pictures of their excellent builds here!
If you are a keen DXer or EME operator then one of my special free designs might be just for you!
The yagis presented here are truly only the very best from my AOWA and FLOWA real 50-Ohm designs. As there are an almost infinate number of variants in any design theme computing power and designers experience narrow down the search for a precise balance in the tradeoffs!
This is my hobby and passion...
THESE YAGI ANTENNA DESIGNS ARE NOT FOR COMMERCIAL USE OF ANY KIND
Private experimenters are free to use these designs for their own personal enlightenment. However, no guarantee or warranty is offered or implied.