# What is 4nec2?

## What is 4nec2?

4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler.

## How is monopole antenna length calculated?

Use the formula: Length (feet) = 234 / Frequency (MHz). For example, if you intend to operate on 14.2 Megahertz (in the 20-Meter amateur radio band): 234 / 14.2 = 16.5 feet (rounded to nearest 0.1 foot). Your 14.2 MHz quarter wavelength wire monopole ham radio antenna needs to be 16.5 feet in length.

What is the impedance of a monopole antenna?

Since at this length the antenna has a current node at its feedpoint, the input impedance is very high. If the antenna were infinitely thin it would be infinite, but for typical thickness monopoles it is around 800-2000 ohms.

What is the length of quarter wave monopole antenna for 2.4 Ghz?

The quarter wavelength printed monopole antenna can be tuned simply by slight changes in length of antenna PCB trace. The length of the antenna trace which is presented in this paper for 2.4GHz is about 23 mm with 1.5 mm width using FR4 PCB.

### What are the advantages of monopole antenna?

Compact size printed monopole antennas are important for the wireless applications due to its advantages of easy fabrication, omnidirectional radiation and wide operation bandwidth.

### Is antenna Magus free?

Antenna Magus is the most extensive antenna synthesis tool available today. You can download the Antenna Magus SE free of charge from the SIMULIA Community. The SIMULIA Community is our user forum for all those interested in simulation of structures, fluids or electromagnetic fields.

How to create a new antenna in 4nec2?

Figure 2: View of 4NEC2 when ﬁrst installed. On the left is the main screen, and on the right is a view of the current geometry. You can click and drag in the geometry screen to view the current antenna from diﬀerent angles. To create a new antenna, we focus on the buttons along the top of the main window (on the left in Figure 2).

What do you need to know about the 4nec2 tool?

The 4NEC2 tool is a windows and nec2 or nec4 based tool for both the starting and experienced antenna modeller that can be used to create, view and check your antenna geometry structure and generate display and compare near and for field radiation pattern.

## How to make a 4nec2 electric dipole simulation?

1 Download and Install Required Components Two routines are required to provide full functionality of NEC simulation, 1) Latest 4NEC2 default version (5.7.5) and 2) 4NEC2 3D extension (5.7.5). I downloaded the Windows setup routines from the website http://home.ict.nl/~arivoors/ as shown in Figure 1.

## What does NEC stand for in wire antennas?

1. Simulation of wire antennas with NEC NEC (Numerical Electric Code) is a simulation method for wire antennas developed by the Lawrence Livermore Laboratory in 1981 for the Navy. The antenna is split up into very short pieces called “segments” where the current and the voltage change linearly (almost).