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Antenna Modeling
by Terry Dettmann
# Antenna Modeling

## Transmission Lines

### Modeled

### Mathematical

### Stubs

## Front end software

### EZNEC

### MMANA

### GAL-ANA

### 4NEC2

### NEC4WIN

### Antenna Model

### NECWin

### CocoaNEC

### NEC

## Geometry

### Elements

### Wires

### Segments

## Coordinates

### Cartesian

### Polar

### Dimensions

## Engines

### NEC

### MiniNEC

### Method of Moments

## Sources

### Voltage

### Current

### Split

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Would you put transmission lines as it's own node or as a sub-node of Geometry?

1/2 wave

1/4 wave

Commercial

Demo Available

Windows

NEC2 Engine

Free Version Available

Windows

MiniNEC based

Commercial Version of MMANA

Uses MiniNEC & NEC2 engines

Free

Windows

Free

Windows

Commercial

Windows

MiniNEC Engine

Commercial

Windows

NEC2 Engine

Macintosh

Free

Source Code, Compile it yourself

Binaries available

No Graphical Interface

Old Fashioned 80-col card input

Line Printer Output

NEC2, Free

NEC4, Licensed, Export Restrictions

X-Y-Z coordinates

Measured linearly from the origin

2D

3D

NEC2, free, available for download, source, binary, Linux, Windows, Macintosh

NEC4, Licensed, Lawrence Livermore National Laboratories, Can handle special cases

Limitations

Known Problems

Originally written in FORTRAN

Method of Moments Computation

Limitations

Known problems, resonant freqs may be slightly in area, converges more slowly when wires meet at an angle, weaker ground model, coverges more slowly when wires of signifcantly different length are parallel

Originally written in BASIC