Antennas and Beyond!
This is a blog dedicated to exploring the fascinating world of antenna design and simulation. Whether you’re a beginner or an experienced engineer, you’ll find valuable insights into antenna modeling, theory, numerical methods, and practical examples of antenna models using AN-SOF Antenna Simulation Software.
Featured
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Linear Antenna Theory: Historical Approximations and Numerical Validation
Discover the vital role of historical theoretical results alongside advanced numerical calculations in accurately approximating current distribution on linear antennas.
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Wave Matching Coefficient: Defining the Practical Near-Far Field Boundary
We explore the concepts of absolute wave impedance and wave matching coefficient (WMC) as practical alternatives to determine a useful boundary between the near and far field regions of an antenna.
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Modeling a J-Fed 5-Element Collinear Antenna for the 2 m Band
If you’re looking for a high-performing omnidirectional antenna, consider this design. It boasts 5 collinear radiant elements that are connected by phasing coils.
Categories
advanced antenna arrays antenna design broadband dipole directional fractal helix loop monopole multiband omnidirectional quad release notes tips & tricks validation yagi
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Recent Posts
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Multiband J-Pole Antenna
This design is for 5 bands on a single pole. Each “J” corresponds to a band and therefore the feed point changes depending on the frequency.
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New Release: AN-SOF 7.50
More compatibility for those who use the NEC format: RP, LD, GM, GS, GH, GA, and EX5 commands can now be imported into AN-SOF. The Note panel now displays an error report when importing NEC files.
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145 MHz 5-Element Array of Square Loops
Here is a relatively compact array of 5 square loops for 145 MHz. It does not need a matching network since the input impedance is practically 50 Ohm.
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17 m Band Spider Delta Loop
These are compact, lightweight antennas that can be used for DX applications. This 2-element array is the simplest we can build to get a directional antenna using delta loops.
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AN-SOF 7.20 is ready!
See how the radiation pattern changes with frequency in AN-3D Pattern. The near field heatmap and current distribution can also be viewed dynamically by changing the operating frequency.
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Moxon-Yagi Dual Band VHF/UHF Satellite Antenna
This model is self-resonant (50 Ohm) in the analyzed frequency range, so it does not need a matching network.
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New Release :: AN-SOF 7.10 ::
AN-SOF 7.10 is now available for download! Access the input impedance and VSWR easily by going to the Main menu > Results. This avoids selecting the segment where the source is located to access the input impedance.
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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.
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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.
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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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Categories
advanced antenna arrays antenna design broadband dipole directional fractal helix loop monopole multiband omnidirectional quad release notes tips & tricks validation yagi
Posts by Category
Antenna Models
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AN-SOF 8.20 Passes IEC Validation
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Modeling a J-Fed 5-Element Collinear Antenna for the 2 m Band
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Modeling a Multiband Dipole
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A Cardioid Small Loop
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Log-Periodic Christmas Tree
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Magnetic loop for 3.5, 7, 14, 21 and 29 MHz
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QFH Antenna for NOAA Satellite Reception
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145 MHz Moxon Antenna
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Biquad UHF Antenna Array
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Broadband Directional Antenna
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5 Examples with less than 50 Segments
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An HF Skeleton Slot Antenna
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Multiband J-Pole Antenna
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145 MHz 5-Element Array of Square Loops
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17 m Band Spider Delta Loop
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Moxon-Yagi Dual Band VHF/UHF Satellite Antenna
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Script for Modeling 2-Element Quad Array
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An 80 meters DX Antenna: A Spiral Loop
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ISM 433MHz Helical Antenna
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Array of Snowflake Quads
Antenna Theory
Modeling Guidelines
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Assessing Antenna Directionality: Front-to-Rear vs. Front-to-Back Ratio
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Adding Elevated Radials Quickly
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Equivalent Circuit of a Balun
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Scilab Script for Plotting Level Curves
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How to Export Data and Plots
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How to Detect Errors in a Model
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Adjusting the Color Bar in AN-3D Pattern
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Setting the Radiation Pattern Center
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How to Merge Projects
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On the Modeling of Radio Masts
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H-Field Option in Preferences
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How to Speed Up a Simulation
Numerical Methods
Updates
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Upgrade to AN-SOF 8.20 – Unleash Your Potential
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New Interactive User Guide
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AN-SOF 8: Elevating Antenna Simulation to the Next Level
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New Release: AN-SOF 7.90
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AN-SOF 7.8 is ready!
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New AN-SOF User Guide
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New Release: AN-SOF 7.50
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AN-SOF 7.20 is ready!
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New Release :: AN-SOF 7.10 ::
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AN-SOF 7.0 is Here!
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New Release :: AN-SOF 6.40 ::
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New Release :: AN-SOF 6.20 ::
Posts by Date
- June 2023 (1)
- May 2023 (4)
- April 2023 (1)
- March 2023 (1)
- February 2023 (3)
- January 2023 (1)
- December 2022 (3)
- November 2022 (3)
- October 2022 (3)
- September 2022 (3)
- August 2022 (3)
- July 2022 (1)
- June 2022 (1)
- May 2022 (1)
- April 2022 (1)
- March 2022 (2)
- February 2022 (3)
- December 2021 (1)
- November 2021 (1)
- October 2021 (1)
- September 2021 (2)
- August 2021 (6)
Archives
-
Linear Antenna Theory: Historical Approximations and Numerical Validation
-
Wave Matching Coefficient: Defining the Practical Near-Far Field Boundary
-
Modeling a J-Fed 5-Element Collinear Antenna for the 2 m Band
-
Assessing Antenna Directionality: Front-to-Rear vs. Front-to-Back Ratio
-
AN-SOF 8.20 Passes IEC Validation
-
Adding Elevated Radials Quickly
-
Upgrade to AN-SOF 8.20 – Unleash Your Potential
-
New Interactive User Guide
-
AN-SOF 8: Elevating Antenna Simulation to the Next Level
-
Modeling a Multiband Dipole
-
A Cardioid Small Loop
-
Log-Periodic Christmas Tree
-
New Release: AN-SOF 7.90
-
Magnetic loop for 3.5, 7, 14, 21 and 29 MHz
-
QFH Antenna for NOAA Satellite Reception
-
145 MHz Moxon Antenna
-
Biquad UHF Antenna Array
-
Broadband Directional Antenna
-
AN-SOF 7.8 is ready!
-
New AN-SOF User Guide
-
5 Examples with less than 50 Segments
-
An HF Skeleton Slot Antenna
-
Equivalent Circuit of a Balun
-
Multiband J-Pole Antenna
-
New Release: AN-SOF 7.50
-
145 MHz 5-Element Array of Square Loops
-
17 m Band Spider Delta Loop
-
AN-SOF 7.20 is ready!
-
Moxon-Yagi Dual Band VHF/UHF Satellite Antenna
-
New Release :: AN-SOF 7.10 ::
-
Script for Modeling 2-Element Quad Array
-
An 80 meters DX Antenna: A Spiral Loop
-
ISM 433MHz Helical Antenna
-
Array of Snowflake Quads
-
AN-SOF 7.0 is Here!
-
Scilab Script for Plotting Level Curves
-
New Release :: AN-SOF 6.40 ::
-
How to Export Data and Plots
-
New Release :: AN-SOF 6.20 ::
-
How to Detect Errors in a Model
-
Adjusting the Color Bar in AN-3D Pattern
-
Setting the Radiation Pattern Center
-
How to Merge Projects
-
On the Modeling of Radio Masts
-
H-Field Option in Preferences
-
How to Speed Up a Simulation