MMANA is simple to use and provides easy to understand graphs. There are two free modeling softwares that I’m aware are used frequently for antenna modeling: MMANA and EZNEC (EZNEC was a paid program and had several free variations, but EZNEC is now free). Is it perfect? No, but it’s surprisingly good… In the past, RF engineers had to perform complex calculations by hand to estimate the performance of even simple antennas, but now with the advent of computer modelling software, the average ham can create a fairly complex computer model of simple ham antennas and see in great detail the expected performance of the antenna. Have you always thought that antennas were “magic”? Well hopefully you understand that there is actual physics involved in the way antennas work, even if it’s not obvious to us.
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