need help about circular arrays..

Hi I am working on circular arrays..i have a question that
Can we scan our beam in 3D pattern? if yes how/? i have seen just azimuth scanning in most of the arrays..please help me..

Assuming your fundamental element is in an array in a particular plane, you can only scan in that plane. Scanning occurs when you add antennas' responses whose delay in receiving or transmitting is controlled. That is, beam forming happens when you achieve constructive interference (add) and destructive interference (subtract) from multiple antennas (elements). The locations where the beams add and subtract are controlled by changing the phase (delay) of each element signal (either by location as in an array, or by electronic signal control)

thanks man..but i need to know that is there any method by using concentric circular or stacked circular ir any other method to scan 3D..if there is ...plz let me know.?