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.

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I think that many technically oriented folks can learn to navigate it. But rather than using another wire, realize that I already have a wire coming back down from the feed point, namely the outside of the co-ax feed itself.

What is the function tutirial TR1 in this circuit 3. The choke both defines the length of the lower section of radiator, which is the coax cable shield, and also keeps the RF from traveling down the feed line back to the radio.

I am pretty familiar with 4NEC2.

It’s not like I’m exceptionally stupid, just strapped for time and I would like to model my vertical without putting someone else out to do it.

In it select “Use original file” then select Generate. I’m sure there is a lurker out there thinking the same thing. Tugorial the main window choose Calculate and then NEC output data. I think the reason you are seeing the NEC error is that by default 4NEC2 opens the last antenna you were trying to simulate.


I lose files sometimes in 4nec2, cannot see the logic of that organisation.

Antenna Simulation Tutorials using 4nec2 – KW4FB

Reflections from the ends of the cable will tend to cancel each other out with this special length cable. This site uses cookies. PV charger battery circuit 4. If we knew the reactance of the choke we could model it with NEC. Equating complex number interms of the other 6. With vertical antennas, the ground model will have an enormous effect on the level of losses, far field radiation pattern, and gain.

In my opinion once you know how to 4jec2 the program, the next logical step is to run an example antenna and play around with it until you understand some of the controls of the program and how to interpret the output.

The gain of elevated antennas is especially better for low radiation angles less than 15 degrees. Vertical antenna radiation patterns. AF modulator in Transmitter what is the A? I’m interested in 4nec2 and have it downloaded into the computer.

4nec2 tutorial

I’ve run into several on U Tube and for whatever reason, they just don’t get the information across to my lil’ ole tuorial brain. I’d recommend to run an example like a simple dipole on a single frequency and observe the impedance, pattern, VSWR etc. 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. In the new window select instead “Far field tutoriial then select Generate.


To drive this antenna several questions come up. You can store these wherever you want as tutoriao. Fill in your details below or click an icon to log in: Hierarchical block is unconnected 3. Now for some question we tutirial hope 4NEC2 can answer. This means you don’t have to enter the parameters for a specific antenna until you know more of how the program works.

Here is a simple explanation of ttuorial types of files. After the simulation completes you will see that there are parameters in the main window which represent the simulation. UA3TWMar 8, A command box will open temporarily to show progress of the simulation. The optimizer or sweeper can be used to change the value of defined variables and generate a collection of output files.

Also very stiff with that soft. RF current magnitude in green. Losses in inductor of a boost converter 9. Note that the capacitance is almost entirely just a function of the coil diameter.