Antenna Modeling With 4NEC2. Presented to HOTARC. By Craig Weixelbaum. May 22, Basic Modeling Approach using 4Nec2. The goals of this A Beginner’s Tutorial for 4NEC, a NEC2 Distribution. Written and Tested by Scroll down, and find “Latest 4nec2 version ()” under the “Downloads” header. Hello! Does anyone know where I can find some good tutorial/guide to get a basics of how to use 4nec2. I am total beginner. I was able to find.

Author: Kigalmaran Kelrajas
Country: Bahrain
Language: English (Spanish)
Genre: Health and Food
Published (Last): 2 November 2016
Pages: 115
PDF File Size: 13.59 Mb
ePub File Size: 20.10 Mb
ISBN: 601-8-15862-535-3
Downloads: 18658
Price: Free* [*Free Regsitration Required]
Uploader: Kazira

Once you feel comfortable with that, then I would advise copying and slightly modifying an example. The SWR without additional tuning is around 1. I think the reason you are seeing the NEC error is that by default 4NEC2 opens the last antenna you were trying to simulate.

How do you get an MCU design to market quickly? Figuring out the self capacitance of the choke coil took a little research.

Any choke I made with ferrite was lossy and had a self resonant frequency below my desired operating frequency of 14 MHz. Here is a simple explanation of the types of files. In the new window select instead tuhorial field pattern” then select Generate. In the main window choose Calculate and then NEC output data. Now for some question we might hope 4NEC2 can answer.

Well, I delete this message and open “file” box.

Antenna Simulation Tutorials using 4nec2

Much better is just a simple solenoid made from the coax feed line itself. This site uses cookies. I lose files sometimes in 4nec2, cannot see the logic of that organisation. If you are beyond this stage and have specific questions about entering antenna simulation input or interpreting results, you can ask them here and someone will likely be able to point you in the right direction.


The harder part than the tool is understanding the underlying antenna theory to know what to do to synthesize sensible designs.

4nec2 tutorial | QRZ Forums

Should I use 50 ohm or 75 ohm coax? WZ7UMar 8, Notify me of new posts via email. Look at the antenna text file and see if you understand some of the syntax and meaning of the lines in the file.

You can turorial re-simulate an input file ttuorial obtain an output file. Attempts at direct measurement of capacitance are confounded by parasitic capacitance of scope probes and by resonances with the physical length of coil wires and connections themselves, so that the measured resonances do not reflect the desired stray capacitance of the coil but rather the length of wires.

It would be good to read how to enter antenna data, but rather than enter a whole antenna file, just modify something you think you understand and see if it does what you think it will. Choosing IC with EN signal 2. Part and Inventory Search. In this case when the simulation completes a new window will open that shows the antenna pattern.

Turn on power triac – proposed circuit analysis 0. This simple antenna system is a great sandbox for learning the tricks of the NEC codes and some of the basic principles of antenna design, and to find all the pitfalls of this nice idea. You are commenting using your Twitter account. I know there is a pdf by Gunthard Kraus that has the basics. AF tutoriall in Transmitter what is the A? Does anyone have a favorite tutorial for the software? One way to get a handle on this is to compare signal levels against an isotropic antenna.

If that design has an error that is caught by the rule checking it will give you the same error until you fix it. I am pretty familiar with 4NEC2. I’m interested in 4nec2 and have it downloaded into the computer. Someone may be able to clarify. I’d recommend to run an example like a simple dipole on a single frequency and observe the impedance, tutoral, VSWR etc. Dec 4nec228: RF current magnitude in green.


Vertical dipole tip at 55 feet, green; 75 feet, pink; and 95 feet, brown. How reliable is it? Digital multimeter appears to have measured voltages lower than expected. If I use 75 ohm coax, how long should the transmission line be?

A Simple Pull-up Mono-Band Verticle Dipole Antenna Design – and 4NEC2 Tutorial

Remember, toothat you do not want a design that tutoriial sensitive to small parameter variations. Note that the capacitance is almost entirely just a function of the coil diameter.

If you have a question about something specific in a youtube video tutroial the link and the time in the video that is unclear and ask your question about what was presented. I understand that my comment is too generalising, just an impression, but it is annoying me most of all there. A command box will open temporarily to show progress of the simulation. Notice in the model figures that the feed point is substantially below the mid-point.

Email required Address never made public.

Maybe it is something like C: Leave a Reply Cancel reply 4nnec2 your comment here Things like the impedance, SWR efficiency etc. Try a few more examples and see if you have mastery of this simple analysis. Dec 242: Losses in inductor of a boost converter 9.