Hi, a buddy of mine is working on a projecting trying to find the best way to transmit electromagnetic wave frequencies, and he wants to use a horn antenna for his project. I was looking into horn antennas, and I'm just curious, the wiki page leaves two separate equations for gain, one with a pyramidal horn antenna, and another for a conical horn antenna. But the equations look pretty much the same, minus the differences of the two shapes that the equations seem to factor in. What is the biggest reason one would choose one type of horn antenna over another? For example, choosing a pyramidal shaped one versus a conical one?