The story of MMANA-GAL antenna files is a fascinating journey through the evolution of antenna modeling software, community-driven libraries, and the democratization of RF design.
Here is the complete story, from its origins to its current state.
Search for *.maa files on GitHub or ask in the QRZ Modeling forum. Many users share files for specific bands like 160m or 6m.
Caution: Always verify downloaded files. Open them in a text editor first. Malformed data or malicious code is rare, but incorrect wire endpoints can crash the simulation.
An MMANA-GAL file is essentially a text file. You can edit it in Notepad, but MMANA provides a built-in editor that handles the formatting for you.
Mastering MMANA-GAL antenna files transforms you from a casual user into an efficient antenna designer. Whether you are downloading a ready-made Yagi file from DL7APV, manually tweaking wire coordinates in a text editor, or batch-processing a library for a new band, understanding the .maa format gives you full control.
Start with the built-in examples, explore community repositories, and soon you will be creating custom files that accurately predict real-world performance. The next time you need to simulate a delta loop for 40 meters or a 5-element Yagi for 2 meters, remember: it all begins with a well-structured .maa file.
Call to Action: Do you have a favorite MMANA-GAL antenna file or a repository link? Share it in the comments below to help fellow enthusiasts build better antennas.
Last updated: October 2025. For more tutorials on antenna simulation and RF design, subscribe to our newsletter.
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.
Whether you are looking to build a simple dipole or a complex multi-element Yagi, understanding how to manage and manipulate these files is essential. 1. What are MMANA-GAL Antenna Files (.maa)?
The .maa file is a plain-text format that stores all the parameters needed for the software to calculate an antenna's performance. When you open a file in MMANA-GAL, it interprets this data to generate a 3D visualization and calculate the feed-point impedance, SWR, gain, and front-to-back ratio. A standard file contains: Geometry: The X, Y, and Z coordinates of every wire. Source: Where the power is being fed into the antenna.
Load: Any coils, capacitors, or traps used to tune the antenna. Frequency: The design frequency for the calculations. 2. Finding and Importing Files
You don't always have to start from scratch. The MMANA-GAL installation usually comes with a vast library of pre-configured files.
Internal Library: Navigate to the ANT folder in your installation directory. You will find subfolders categorized by antenna type (e.g., HF Yagi, VHF, Vertical).
Online Repositories: Many radio amateurs share their .maa files on personal blogs or forums like QRZ.com or dedicated antenna modeling groups. 3. How to Edit the File Geometry
Once a file is loaded, you can modify it in the Geometry tab. This is where you define the physical structure.
Wire Segments: You can break long wires into segments to increase the accuracy of the simulation.
Tapering: If you are using aluminum tubing of different diameters (common in Yagis), you can define a "taper" to accurately reflect how the element’s diameter changes from center to tip. 4. Running the Simulation (The Calculate Tab)
The magic happens in the Calculate tab. Here, you select your ground type (Real, Free Space, or Perfect) and the height of the antenna above ground.
Real Ground: Crucial for HF antennas to see how the earth affects the takeoff angle and gain.
SWR Plotting: After the initial calculation, use the "Plots" button to see how the SWR behaves across a specific bandwidth. 5. Optimization: Letting the Software Do the Work
One of the best features of MMANA-GAL files is Optimization. If your antenna isn't resonant or has a poor front-to-back ratio, you can set "Goals." Open the Optimization tool.
Choose which variables to change (e.g., wire length or spacing).
Set your priorities (e.g., "Minimize SWR" or "Maximize Gain").
The software will automatically rewrite the .maa file geometry to find the best possible performance. 6. Exporting and Sharing
Once you have perfected your design, you can save the .maa file and share it with others. Because they are tiny text files, they are easy to email or post on forums. Many builders also use the "Print" function to generate a "Cut List," which translates the coordinate points into actual lengths of wire or tubing for physical construction. Conclusion
MMANA-GAL antenna files are more than just data; they are a digital laboratory. By mastering the .maa format, you can experiment with radical antenna designs without ever picking up a pair of wire cutters, ensuring that when you finally do build, your antenna performs exactly as expected.
MMANA-GAL is a powerful, free antenna-analyzing tool for radio amateurs and RF enthusiasts that uses the Method of Moments (MININEC-3 engine) to simulate wire antenna performance. Its native file format, .maa, stores the complete geometry, sources, and environment settings of an antenna model. Core Functionality & Tab Structure
The software is organized into four primary tabs that guide the design process:
Geometry: Where you define the antenna using a table-based editor. You input 3D coordinates ( ) for wire start and end points.
View: A graphical viewer that allows you to rotate and inspect the physical layout, current distribution (red lines), and source locations (red circles). mmana-gal antenna files
Calculate: The engine where you set the frequency, ground type (free space or real ground), and wire material (e.g., copper) to compute SWR and impedance.
Far Field Plots: Visualizes 2D and 3D radiation patterns, including azimuth and elevation plots to determine gain and front-to-back ratios. Understanding .maa Files
The .maa file is the standard data file generator for MMANA-GAL. Key characteristics include: MMANA-GAL basic
To obtain antenna text files (known as .maa files) for MMANA-GAL, you can either download ready-made files or copy-paste text data directly into the software's editor. Popular Sources for Antenna Files
MMANA-Gal Antenna Modeling Blog: A repository of various antenna source codes and definitions (e.g., Yagi, Dipole, Loop) provided by radio amateurs.
DL2KQ Library: A comprehensive library of antenna files (specifically for the related GAL-ANA and MMANA-GAL) ready for use.
GitHub (Handiko's Collection): A public repository containing a collection of antenna simulation files for both MMANA-GAL and 4NEC2.
Built-in Library: The standard installation of MMANA-GAL includes a folder (typically MMANA-GAL/ANT/) containing examples like the DP20.maa dipole. How to Use Antenna Text Files
Direct Download: Download the .maa file and open it via File > Open (*.maa) within the program. Copy and Paste Text:
Find the antenna definition text (it will look like a table of coordinates).
Go to the Edit menu in MMANA-GAL and select Antenna definition edit.
Paste the copied text into the window and click OK to update the geometry.
Online Generators: Use tools like the Online Polygon Data Generator to create custom .maa data for specific shapes like circles or polygons, which you can then paste into the editor. Sample Structure of a .maa File
An .maa file is a plain text file that defines an antenna's physical properties. It generally includes: Introduction to Antenna Modelling - MMANA-GAL
To create an antenna file (.maa) for MMANA-GAL, you essentially write a plain-text description of the antenna's physical structure and electrical properties. Quick Template: Simple Dipole (.maa)
You can copy the text below into Notepad and save it with a .maa extension to load it directly into MMANA-GAL basic. This example is for a 20-meter dipole (14.15 MHz).
20m Dipole * 14.15 *** Wires *** 1 0.0, -5.1, 10.0, 0.0, 5.1, 10.0, 0.001, -1 *** Source *** 1, 0 w1c, 0.0, 1.0 *** Load *** 0, 0 *** Segmentation *** 400, 40, 2, 2 *** G/H/M/R/K *** 2, 10.0, 1, 50.0, 120, 0, 0 Use code with caution. Copied to clipboard Understanding the File Structure
The .maa format is organized into specific blocks that define how the software simulates the antenna:
Header: The first three lines usually contain the Project Name, a comment line (often just *), and the Target Frequency in MHz. Wires: This is the core geometry. 1: Number of wires.
0.0, -5.1, 10.0...: Coordinates for (X1, Y1, Z1) and (X2, Y2, Z2) in meters. 0.001: Wire radius in millimeters. -1: Standard auto-segmentation. Source: Defines where the power enters the antenna. w1c: Source is at the center of wire 1. G/H/M/R/K: These are simulation environment settings.
Includes ground type (e.g., 2 for Real Ground), height above ground, and the characteristic impedance (usually 50.0 ohms). How to Create Your Own
You can manually build these files using the Geometry Tab within the MMANA-GAL software.
Define Wires: Enter the start and end points in the spreadsheet-style table.
Add Source: Right-click a wire segment in the View Tab or use the source table to place your feed point (e.g., w1c for center, w1b for beginning).
Set Environment: Go to the Calculate Tab to set your ground type (Free Space, Perfect, or Real) and height.
Optimize: Use the built-in Optimizer to let the software automatically adjust wire lengths for the best SWR or Gain.
💡 Pro Tip: If you need complex shapes like circles or arcs, MMANA-GAL only uses straight vectors. Use an Online Polygon Generator to create the many short straight wires needed to "draw" a circle.
If you tell me the type of antenna (like a Yagi, Vertical, or Loop) and the frequency you're targeting, I can generate a custom file snippet for you. AI responses may include mistakes. Learn more MMANA-GAL basic
MMANA-GAL Antenna Files: A Deep Dive into Amateur Radio Modeling
For ham radio enthusiasts, antenna design is often a mix of black magic and hard science. While many rely on trial and error, the modern amateur has a powerful ally: MMANA-GAL. This antenna modeling software, based on the MININEC engine, has become a staple in the community. At the heart of its utility are .maa antenna files—the blueprints that allow you to simulate, analyze, and optimize your builds before ever cutting a piece of wire.
Whether you are a seasoned DXer or a new technician, understanding how to handle and create MMANA-GAL files is a game-changer for your station’s performance. What are MMANA-GAL Antenna Files? The story of MMANA-GAL antenna files is a
MMANA-GAL files (ending in the .maa extension) are simple text files that contain the geometric and electrical descriptions of an antenna. Unlike complex CAD files, .maa files are lightweight and easily shared. They tell the software:
Geometry: Where every wire starts and ends in a 3D coordinate system (X, Y, Z). Tapering: The diameter of the wire or tubing used. Sources: Where the feed point is located.
Loads: Any capacitors, inductors, or traps included in the design.
Environment: Ground conditions (Real vs. Free Space) and height above ground. Why Use .maa Files? 1. Accuracy Before Assembly
The primary benefit is predictive power. By loading an antenna file, you can calculate the SWR (Standing Wave Ratio), Gain (dBi), Front-to-Back ratio, and radiation patterns across a wide frequency range. This prevents "cutting the wire three times and it's still too short." 2. Optimization
MMANA-GAL features a powerful optimization tool. You can take an existing file and tell the software: "Find the best wire length to give me the lowest SWR at 14.200 MHz." The software will iterate through thousands of possibilities in seconds, modifying the antenna file for peak performance. 3. Community Sharing
The amateur radio community is built on sharing. If a famous op in Japan designs a high-performance 20m Yagi, they can simply email you the .maa file. You can then open it, adjust the wire thickness to match what you have in your junk box, and see how it performs at your specific height. Anatomy of a MMANA-GAL File
If you open a .maa file in a text editor (like Notepad), you’ll see rows of data. While the GUI handles this for you, understanding the structure is helpful:
The Header: Defines the name of the antenna and the center frequency.
The Wire Section: Lists the coordinates. For example, a simple dipole might have one wire running from (-5, 0, 10) to (5, 0, 10), representing a 10-meter long wire 10 meters off the ground.
Source Section: Identifies which wire and which segment receives the RF power.
Ground Parameters: Defines whether the simulation uses "Perfect," "Free Space," or "Real" ground (using dielectric constant and conductivity). Where to Find Antenna File Libraries
You don’t always have to start from scratch. MMANA-GAL comes with a massive built-in library of files located in the ANT folder of the installation directory. These include: Basic: Dipoles, verticals, and ground planes. Beams: Classic Yagis, Quads, and Log-periodics.
VHF/UHF: High-gain arrays for satellite and terrestrial work.
Shortened: Antennas using coils or capacity hats for restricted spaces.
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
Check Your Segments: If a wire has too few segments, the simulation will be inaccurate. If it has too many, it will be slow. Use the "Auto-segmentation" feature to stay in the "sweet spot."
Mind the Wire Diameter: 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.
Real-World Ground: Always test your files using "Real Ground" settings before building. An antenna that looks perfect in "Free Space" might have a completely different radiation angle once you put it over soil. Conclusion
MMANA-GAL antenna files are more than just data; they are a bridge between theory and a successful contact. By mastering the use of .maa files, you save time, money, and frustration, ensuring that when you finally hoist that wire into the air, it performs exactly as intended.
For amateur radio enthusiasts and antenna designers, MMANA-GAL is more than just software; it is a rite of passage. Originally developed by Makoto Mori (JE3HHT) and later refined by Alex Schewelew (DL2KQ) and Igor Gontcharenko (DL1PBD), this MININEC-based tool has become the gold standard for free antenna modeling.
However, the software is only as good as the data you feed it. At the heart of every great simulation is a library of MMANA-GAL antenna files (ending in the .maa extension). Here is a deep dive into what these files are, how to use them, and where to find the best ones.
To prepare MMANA-GAL antenna files ( ), you can use the software's built-in tab or manually edit the text-based file in a program like 1. Key Components of an .maa File A standard
file is a plain text document organized into sections defined by asterisks. www.f5swn.fr Title/Comment Section : Descriptive text about the antenna design. : The primary design frequency in MHz (e.g., 7.2 or 14.15). Wires Section ( ***Wires***
Defines each wire element using three-dimensional coordinates: (start) and : The radius of the wire in millimeters. : The segmentation method used for calculations. Sources Section
: Defines the feed point (e.g., center of a wire or beginning of a wire). Ground and Material
: Settings for ground type (Real, Free Space) and wire material (e.g., Copper). 2. How to "Prepare" the Text Manually
If you are generating the text outside of the MMANA-GAL interface, ensure you follow this structural logic under the ***Wires*** Declare Total Wires : Immediately below ***Wires***
, you must specify the total number of wire lines that follow. Coordinate Formatting
: Each line represents one wire. For a simple 40m dipole centered on the Y-axis at a height of 10m, the text would look similar to: 0, -10.0, 10.0, 0, 10.0, 10.0, 0.001, -1 (This defines a wire from at a height of , with a 1mm radius and auto-segmentation) 3. Working with Constants EFHW Antenna Simulation Using MMANA GAL
MMANA-GAL is a powerful, free antenna-analyzing tool used by radio amateurs to design and simulate antennas using the Moment Method. The core of any project in this software is the .maa file, a text-based format containing the geometry, frequency, and ground settings for a specific antenna model. Understanding .maa Files Converting and interoperability
An .maa file is essentially a detailed blueprint of an antenna's physical and electrical properties. Geometry Data: Uses a 3D rectilinear grid ( ) to define the start and end points of every wire element.
Source Definition: Identifies the "feed point" where power is applied, often labeled as a "pulse" in the software.
Environment Settings: Includes ground characteristics (real or ideal) and wire materials (like copper).
Portability: Because they are simple text files, they can be opened and edited with tools like Notepad++ for manual tweaks. Creating and Using Antenna Files First Time Working With MMANA GAL
Unlocking High-Performance Amateur Radio: A Guide to MMANA-GAL Antenna Files
If you’ve spent any time in the amateur radio world, you’ve likely heard of
. It is one of the most powerful, free tools for antenna modeling, based on the MININEC engine. But for many, the real "magic" isn't just in the software—it’s in the .maa files that drive it.
In this post, we’re diving into what makes MMANA-GAL files so useful, how to find them, and how to use them to perfect your next antenna build. What are .maa Files? At its core, an
file is a simple text file that contains the geometric and physical description of an antenna. When you open one in MMANA-GAL, the software reads three primary sets of data: : The XYZ coordinates of every wire in the antenna. : Where the power is being fed into the system.
: Any capacitors, inductors, or resistors added to the wires.
Because these files are so lightweight, they are the "standard currency" for hams sharing antenna designs online. Why Use Existing Antenna Files?
You don't always need to reinvent the wheel. Here is why the amateur radio community relies on shared Verification
: Before you cut a single inch of expensive copper wire, you can run a simulation of a proven design to see how it performs over your specific ground conditions. Optimization
: Many files come "pre-optimized." You can use the software’s "Auto-Optimization" tool to tweak a shared file for your specific frequency of interest (e.g., shifting a 20m dipole to be resonant at 14.150 MHz).
: Studying a complex file—like a multi-band Yagi or a Moxon—is the best way to learn how professional-grade antennas are actually constructed. Where to Find Quality MMANA-GAL Files
The software actually comes with a massive library built-in, but there are several external repositories worth checking out: The MMANA-GAL Library : Look in the
folder within your installation directory. It contains hundreds of models for everything from simple verticals to complex rotating beams.
: The original home of the software hosts a deep archive of user-contributed files. Personal Ham Pages
: Many famous antenna designers (like DK7ZB or G0KSC) often provide MMANA-GAL compatible files for their published designs. Quick Tips for Working with .maa Files Watch Your Units
: Always check if the file is in meters or feet before you start calculating your wire lengths. Check the Segmentation
: If a model is giving you "unrealistic" gain, check the segmentation settings. High-accuracy models require finer segments, especially near the feed point. Edit in Notepad : Since they are plain text, you can actually open an
file in any text editor to make quick changes to the wire coordinates without even opening the software. Final Thoughts
MMANA-GAL antenna files are more than just data; they are a collaborative map of ham radio innovation. Whether you are modeling a "stealth" attic antenna or a massive DX tower, starting with a solid file is the fastest way to ensure your signal gets out. What’s your go-to antenna file? Let us know in the comments, or share your own designs with the community! within these files?
MMANA-GAL antenna files are the data blueprints used by the MMANA-GAL software, a popular tool based on the "Method of Moments" (MININEC engine) for modeling and analyzing wire antennas. These files allow amateur radio operators and engineers to define, share, and optimize antenna designs before ever cutting a piece of wire. Core File Formats
The software primarily interacts with specific text-based and binary formats: (MMANA Antenna) : The native and most common file format. It is an ASCII text file
that contains the coordinates (X, Y, Z), wire radius, and source placements for the antenna's geometry.
: A binary version of the antenna data, often found in older or specific project collections. : The primary format for
(the more advanced successor to MMANA-GAL). It is a comprehensive binary file that stores all antenna data, including advanced modeling parameters. Structure of an
file is organized into sections that correspond to the software's input tabs: MMANA-GAL basic
MMANA-GAL is one of the most popular freeware antenna modeling programs based on the Method of Moments. When you are looking for "full feature" antenna files, you are typically looking for a comprehensive library that goes beyond the basic dipole and Yagi examples included in the default installation.
Here is a breakdown of where to find full-featured MMANA-GAL antenna files, what they include, and how to use them effectively.
The very first line of any .maa file is a comment. It is often ignored by the solver but is vital for organization.
3 Element Yagi for 50 MHz, optimized for low SWR
| From | To | Method |
|------|-----|--------|
| .maa | NEC2 .nec | File → Export → NEC2 |
| .maa | EZNEC .ez | Not directly – use NEC2 as intermediate |
| .maa | 4nec2 .nec | Open in 4nec2 (supports .maa directly) |
| .maa | Plain text description | View in Notepad |