1 / 20

Antenna Modeling software

Antenna Modeling software. …teaches you more about antennas …how to design better antennas …how to predict antenna performance …how to “tune” for performance …lets you try “what if….”. “What is Antenna Modeling?”. it is NOT making tiny models

Thomas
Download Presentation

Antenna Modeling software

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Antenna Modelingsoftware …teaches you more about antennas …how to design better antennas …how to predict antenna performance …how to “tune” for performance …lets you try “what if….” Ken Konechy W6HHC

  2. “What is Antenna Modeling?” • it is NOT making tiny models • it is a computer program to predict and analyze antenna performance Ken Konechy W6HHC

  3. “What is Antenna Modeling SW?” • Allows you to describe your antenna • Allows you to describe your antenna height • Allows you choose construction materials • Allows you to describe your ground conditions • Allows you to analyze gain • Allows you analyze impedance / SWR • Allows you to predict “band-width” • Allows you to plot directivity & front-to-back Ken Konechy W6HHC

  4. Example of an Antenna Modeling Program Describing a 10M 2-El Beam Ken Konechy W6HHC

  5. Example of an Antenna Modeling Program Select Material for a 10M Dipole Ken Konechy W6HHC

  6. Example of an Antenna Modeling Program Select “ground conditions” for a 10M Dipole • NO GROUND – “free space conditions” • PERFECT GROUND – “ The perfect world is simulated” • SOMMERFELD GROUND – “Choose many real conditions” • REAL GROUND – “Complex, allows nearby cliffs, hills, etc.” Ken Konechy W6HHC

  7. Example of an Antenna Modeling Program Select “Sommerfeld ground conditions” Ken Konechy W6HHC

  8. Example of an Antenna Modeling Program Gain plots for a 6-EL 20M Beam Ken Konechy W6HHC

  9. Example of an Antenna Modeling Program Predicting SWR for a 10M Dipole at 20ft Ken Konechy W6HHC

  10. Let us Explore a 10M Dipole Gain plots for 10M Dipole over different grounds Height = 20 ft Ken Konechy W6HHC

  11. Let us Explore a 10M Dipole Gain plots for 10M Dipole at different heights Over Sandy ground Ken Konechy W6HHC

  12. Let us Explore a 10M Dipole Gain plots for 10M Dipole at 5 degree Elev 10.7 dB of the gain is lost at 5 degrees!!!!!! Ken Konechy W6HHC

  13. Let us Explore a 2-EL 10M Beam Gain plots for 10M Beam at different heights Ken Konechy W6HHC

  14. Explore Antenna Model for 2M J-Pole J-Pole with “no pipe” – Gain = 5.77 dB Ken Konechy W6HHC

  15. Antenna Model for 2M J-Pole Four J-Poles with “6-in pipe” to “25-in-pipe” Ken Konechy W6HHC

  16. Antenna Model for 2M J-Pole J-Pole with “9.5 ft conductive pipe” – Gain = 4.3 dB (-1.5 dB loss from no pipe) Ken Konechy W6HHC

  17. Antenna Model for 2M J-Pole • Last month we asked whether the length of support of J-Pole made difference?? • Can it be longer than 6 inches?? • The J-pole model showed that gain decreased when pole was 19 in, 25 in & 9.5ft • I have not yet tried whether grounding the support pole also has an impact on gain…I will now guess…”yes” Ken Konechy W6HHC

  18. Different Antenna Modeling SW • NEC2 – was designed by Lawrence Livermore Labs • Win-NEC-Plus – uses NEC2 “core” SW with GUI - by L. B. Cebik, W4RNL - www.nittany-scientific.com • EZNEC - uses NEC2 “core” software with GUI - by Roy Lewallen, W7EL - www.eznec.com • MINI-NEC – simplified NEC2 to run on slow PCs - fairly obsolete, inaccurate Ken Konechy W6HHC

  19. ARRL Class on Ant Modeling • If you want to learn how to use NEC2 • ARRL offers class beginning each month. • On-line Internet class is 16 weeks long • 3 hours per week • On-line tutor for help and grading • Cost $85 Ken Konechy W6HHC

  20. Antenna Modelingsoftware The End Any Questions?? Ken Konechy W6HHC

More Related