If you download an .maa file designed for 144 MHz and want to use it on 430 MHz, do not just change the frequency number in the file. You must use MMANA-GAL's internal ( Edit > Scale ) so that all physical wire lengths and spacings compress proportionally. Summary Checklist for .maa File Success What to Check Why It Matters File Verification Ensure file ends in .maa , not .txt . Software won't recognize raw text extensions. Source Check
MMANA-GAL is sensitive to wire thickness. If you model an antenna with 12 AWG wire but build it with 14 AWG, your resonant frequency will shift slightly.
Once optimized, save the file as a new version (e.g., dipole_optimized.maa ). Where to Find Ready-Made MMANA-GAL Antenna Files
Go to the "Source" table, select Wire 1, and set the position to w1c (Wire 1, Center). mmana-gal antenna files
Some files include loading coils, traps, or transmission line transforms. These appear after the source.
: Used for exporting calculation results, such as far-field patterns or impedance tables, for use in external graphing software. How to Use .maa Files
Go to File > Open in MMANA-GAL to load an existing .maa file. If you download an
MMANA-GAL antenna files are the foundational building blocks of modern DIY antenna design. By understanding how .maa files structure geometric coordinates, source points, and environmental factors, you can easily troubleshoot existing designs, customize classic antennas for your specific location, and confidently predict real-world performance before buying materials or cutting wire. If you want to explore further,maa file.
Within the Calculate tab, clicking allows you to select specific variables—such as wire lengths, element spacing, or height—and set a goal. You can instruct the software to prioritize: Minimum SWR Maximum Gain Maximum Front-to-Back ratio
✅ – Describe the antenna, date, author, and intended band. ✅ Define the frequency explicitly – Always include the frequency (MHz)= line. ✅ Use real-world wire diameters – 1–2 mm for thin wire, 10–20 mm for thick elements. ✅ Set segmentation to -1 – Let MMANA-GAL decide the segmentation for best speed vs. accuracy. ✅ Place the feed point on a wire segment – Not in free space. ✅ Test for convergence – Run the simulation, then double the number of segments. If results change little, your file is stable. Software won't recognize raw text extensions
When you open an .maa file in a text editor, you will see structured lines of text divided into logical sections. While you will usually edit these through the MMANA-GAL graphical user interface (GUI), understanding the raw format is useful for troubleshooting or bulk editing.
Antenna modeling software has revolutionized how amateur radio operators, engineers, and RF enthusiasts design communication systems. At the heart of free, high-performance antenna analysis is MMANA-GAL, a powerful tool based on the Numerical Electromagnetics Code (MININEC). To utilize this software effectively, you must understand how to create, read, and manipulate (typically saved with the .maa extension).
MININEC engines can struggle with accuracy if a source is placed on a wire segment that is exceptionally short and thick. Try to ensure your source segment is longer than the wire's diameter.