antenna modeling software l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Antenna Modeling software PowerPoint Presentation
Download Presentation
Antenna Modeling software

Loading in 2 Seconds...

play fullscreen
1 / 20

Antenna Modeling software - PowerPoint PPT Presentation


  • 246 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Antenna Modeling software' - Thomas


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
antenna modeling software

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

what is antenna modeling
“What is Antenna Modeling?”
  • it is NOT making tiny models
  • it is a computer program to predict and analyze antenna performance

Ken Konechy W6HHC

what is antenna modeling sw
“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

example of an antenna modeling program
Example of an Antenna Modeling Program

Describing a 10M 2-El Beam

Ken Konechy W6HHC

example of an antenna modeling program5
Example of an Antenna Modeling Program

Select Material for a 10M Dipole

Ken Konechy W6HHC

example of an antenna modeling program6
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

example of an antenna modeling program7
Example of an Antenna Modeling Program

Select “Sommerfeld ground conditions”

Ken Konechy W6HHC

example of an antenna modeling program8
Example of an Antenna Modeling Program

Gain plots for a 6-EL 20M Beam

Ken Konechy W6HHC

example of an antenna modeling program9
Example of an Antenna Modeling Program

Predicting SWR for a 10M Dipole at 20ft

Ken Konechy W6HHC

let us explore a 10m dipole
Let us Explore a 10M Dipole

Gain plots for 10M Dipole over different grounds

Height = 20 ft

Ken Konechy W6HHC

let us explore a 10m dipole11
Let us Explore a 10M Dipole

Gain plots for 10M Dipole at different heights

Over Sandy ground

Ken Konechy W6HHC

let us explore a 10m dipole12
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

let us explore a 2 el 10m beam
Let us Explore a 2-EL 10M Beam

Gain plots for 10M Beam at different heights

Ken Konechy W6HHC

explore antenna model for 2m j pole
Explore Antenna Model for 2M J-Pole

J-Pole with “no pipe” – Gain = 5.77 dB

Ken Konechy W6HHC

antenna model for 2m j pole
Antenna Model for 2M J-Pole

Four J-Poles with “6-in pipe” to “25-in-pipe”

Ken Konechy W6HHC

antenna model for 2m j pole16
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

antenna model for 2m j pole17
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

different antenna modeling sw
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

arrl class on ant modeling
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

antenna modeling software20

Antenna Modelingsoftware

The End

Any Questions??

Ken Konechy W6HHC