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  • Script for modeling 2-Element Quad Array

    2-element quad antennas are very popular due to their compact size and gain similar to a more element Yagi. In addition, they can be designed to obtain an input impedance of 50 Ohm. This design can operate at 27.5 MHz. We have added a script that allows us to plot the gain and front-to-back ratio […]

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  • An 80 meters DX antenna: A spiral loop

    A half-wave dipole would have a length of 40 meters in this band (3.75 MHz), difficult to install at home due to lack of space. Not to mention the complaints from our neighbors. A spiral loop is attractive for its small size and relative ease of tuning because it is basically an inductor to which […]

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  • ISM 433MHz Helical Antenna

    Small helical antennas for the 433 MHz ISM band are a good example where we need advanced software that has the ability to model:  AN-SOF includes all these features. In this example, a perfect ground plane is used to get the input impedance: 48 Ohm, very close to the 50 Ohm of the antenna datasheet. […]

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  • Array of Snowflake Quads

    Nathan Cohen in the US fractalized the quad loop based on the Minkowski square and invented an array of two elements. I think the biggest advantage of fractal antennas is that we get a wide bandwidth with a small size. This simulation shows that we can almost double the bandwidth with a 3-element array. It […]

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  • AN-SOF 7.0 is Here!

    AN-SOF 7.0 is Here! Run bulk simulations and process multiple input files with just one click. We have chosen the NEC format for the input files as it is a standard adopted by many users. Forget about running the simulations one by one, run them all at once.

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  • Scilab script for plotting level curves

    The Scilab script shown in this video, Isocontours script, is ready to use together with AN-SOF. It allows us to plot level curves or isocontours of a field pattern. The example shows the electric field pattern at the soil level just below an Inverted-V antenna. Download Script > Download Model >

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  • New Release :: AN-SOF 6.40 ::

    New Release :: AN-SOF 6.40 :: Tabular input of linear wires as well as sources and loads. List of recently open projects in the File menu. Zoom in and out by rotating the mouse wheel.

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  • How to export data and plots

    Did you know that AN-SOF data can be exported to Excel? It is important to be able to export data so we can write reports and share our progress with colleagues. Simulation results can be exported to CSV (Comma Separated Values) files, where data are saved in tabular format. CSV files can then be opened […]

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  • New Release :: AN-SOF 6.20 ::

    New Release :: AN-SOF 6.20 :: Radiation patterns plotted in AN-Polar can now be exported as *.ant files. The *.ant format can then be imported into the Radio Mobile propagation software. Exportation of linear wires in DXF format has been added.

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  • How to detect errors in a model

    To discover errors in the wire structure we can use the following functions in the AN-SOF main menu > Tools option: Those wires in error will be highlighted in red and those in warning in yellow. Keep in mind that we can still run a simulation with wires in warning if we check the validity of the […]

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