About a year ago someone posted an excel drawing that had all the ratio measurements needed to construct a biquad antenna for any frequency. I've lost the doc, anyone know where I might be able to find this information out again?
Sorry for that. I'll try another way in a German forum. I read an article there about the quad antenna.Boncuk, that's the same link Mike posted. I've as yet not found the equation to determine the element length for an arbitrary frequency.