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Originally Posted by Apollyon
Okay. Basic question about these cantennas: Shouldn't the elements be insulated from each other, like a yagi? Or can you point me in the direction of a page that explains the theory?
Apollyon
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I'm pretty sure it doesn't matter that much at these frequencies. There are some logarithmic designs where the elements are all etched out of a continuous trace of printed circuit.
Too be honest though, it's a good question, and I'd recommond getting a copy of the ARRL Antenna Handbook for the definative answer. (Mine is long gone and I really need to replace it...)
As far as theory goes, (again from memory) it has to do with the individual elements resonating at the right frequencies due to their length (or diameter in this design) and little to do with conducting in an electrical fashion. Think more like a tuning fork vibrating at the right sound rather than a wire conducting power to a light bulb and you're starting to get the idea.