Kunstmuseum Den Haag heeft een schatkamer van meer dan 160.000 kunstwerken. Hier werken we aan de online ontsluiting van de hoogtepunten uit deze collectie.
The geometry lines are unforgiving: X1 Y1 Z1 X2 Y2 Z2. Confusing Y and Z will turn a horizontal dipole into a random sloper.
If two wires are supposed to connect electrically, their coordinates for that point must match exactly to the millimeter. If one is and the other is
If you want, I can:
: This is the most important file. The .maa file contains the complete definition of your antenna's geometry, including wire coordinates (X, Y, Z), wire diameters, sources (feedpoints), loads (inductors, capacitors, resistors), and other key parameters. Essentially, it's the blueprint for your antenna. mmana-gal antenna files
Whether you want to build a simple backyard dipole, a high-gain Yagi for VHF/UHF DXing, or a complex directional array, understanding how to read, modify, and manage MMANA-GAL antenna files is your key to success. This comprehensive guide covers everything you need to know to master .maa files and elevate your antenna modeling game. What is an MMANA-GAL Antenna File (.maa)?
Select your goals by adjusting the sliders for , SWR , Gain , and F/B Ratio .
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: The geometry lines are unforgiving: X1 Y1 Z1 X2 Y2 Z2
Open MMANA-GAL and navigate to the tab. In the Frequency box, type 14.15 . Set the Global Match (Z0) to 50 ohms. Step 2: Enter the Wire Coordinates A half-wave dipole formula is roughly (in feet) or
The use of MMANA-GAL antenna files offers several advantages:
When you install MMANA-GAL, it includes a massive directory of pre-made .maa files. Navigate to the installation folder (usually C:\MMANA-GAL\ANT\ ) to find categorized folders: Dipoles, verticals, and ground planes. HF multi-band: Log-periodics, traps, and windom antennas. VHF/UHF: Yagis, quads, and helical antennas. 2. Online Repositories and Forums If one is and the other is If
If a wire is too short or too long relative to its wavelength, MMANA-GAL might throw a segmentation fault or yield inaccurate SWR readings. Use the automatic segmentation functions to fix this.
for Start (End 1) and End (End 2) in meters.
MMANA-GAL antenna files are the foundational building blocks of digital antenna experimentation. By mastering how to read, modify, and optimize .maa files, you can simulate endless variations of dipoles, Yagis, and loops long before cutting a single strand of copper wire.
An inverted-V requires at least two wires meeting at an apex, or one continuous wire split into segments. For simplicity, we will use two wires meeting at a central feed point at 10 meters high ( Radius: 0.8 mm (typical 14 AWG wire) Wire 2 (Right Leg): Radius: 0.8 mm Step 3: Place the Source (Feedpoint)