reflector analysis

i have not done much work with reflectors but now need a tool to do such analysis. from what i can remember some versions of nec codes have the ability to analyze reflector performance given a feed pattern determined by the user. also do these codes allow for various reflector designs such as: prime, offset, cassegrain and gregorian? also it would be important to include any blockage such as spars or feeds. typical info needed would be patterns, efficiency, gain and so forth....

could anyone suggest a specific code and give me an idea how to obtain
thanks in advance :D

ghb

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