http://hamsoft.ca/pages/mmana-gal.phpMMANA-GAL is a free download and a very capable program. It's also easy to learn, with its onboard tutorial. With minimal effort, you'll be able to "build" all sorts of antennas to see what works and what doesn't.
By the way, when you ask a question about phased arrays, it's helpful to include antenna height. Mutual impedance with the ground can cause perturbations to otherwise good antenna ideas. MMANA-GAL will allow you to play with the height once you have "built" the array.