MMANA-GAL is a powerful, free antenna modeling software based on the MININEC engine. For ham radio enthusiasts and antenna designers, the "antenna files" (typically ending in .maa) are the core blueprints that define everything from wire geometry to frequency optimization.
Additionally, sites like AC6V and various DX clubs maintain repositories of proven antenna files that you can download and "virtually" test. Tips for Working with .maa Files mmana-gal antenna files
Mmana-gal_Antennas/
├── HF_Bands/
│ ├── 160m_80m/
│ ├── 40m_20m/
│ └── 15m_10m/
├── VHF_UHF/
│ ├── 6m_2m/
│ ├── 70cm_23cm/
│ └── LFA_Yagis/
├── Portable/
│ ├── Magnetic_Loops/
│ └── End_Fed_Half_Wave/
├── Receiving/
│ └── Beverage_Flags/
└── Optimized_With_GAL/
└── (Files modified by genetic algorithm)