Originally Posted by Zahnarzt
Ahh. I have that one. Haven't found a section that directly address spurious emissions related to element geometry, even with a solid PDF search. If you have that earmarked, wouldn't mind knowing what section it is. Anyway, I picked up a biquad from Tim, and it arrived a bit beat up. That's why I made my own element in a freak spurt of free time while I happened to not be at work, and my 3mo old was sleeping!
The sharp bend issue is not outlined in the ARRL antenna book. It is in one of their other publications, though. I can't remember which one. However for an RX antenna, there are no spurs as it is only receiving a signal, not transmitting, so it's not a problem. In fact, the square geometry is just for ease. you can make it a circle, triangle, octagon, ect. It doesn't matter the shape so long as it is one wavelength and symettrical