John, a beam made of inverted vees, or upright vees, works the same as a beam made of straight elements. A quad is a beam made of loops and still follows all the rules of a beam. Of course you can do
This is a fallacy which should end. Higher is not always better. You can get into a situation where there are 10 or more lobes, and each of those lobes will take a portion of the total power fed int
Higher USUALLY is better to a point. Having used a two element quad at 100 feet and two dipoles at 150 feet, I can tell you neither of those set ups was too high. Of course modeling is the way to go.