Antennas Research Group / Democritus University of Thrace
Christos Koutsos, Nikolitsa Yannopoulou and Petros Zimourtopoulos
VEMSA3D
A floss Visual ElectroMagnetics
Simulator for 3D Antennas
33rd TSP 2010
VEMSA3D - Ancestors : 1/2
ThinWire 1980
RichWire 1990
1/17
VEMSA3D - Ancestors : 2/2
WWW
Virtual Reality 1995
RadPat4w 2000
2/17
VEMSA3D - The Starting Window
3/17
VEMSA3D - Menus and Dialog Boxes
4/17
VEMSA3D - Simulation Results : 1/2
2D and 3D E - U Radiation Patterns
Industrial Standard
The Half-wave Dipole : 9 modes
5/17
VEMSA3D - Simulation Results : 2/2
Commercial Antenna
HUF TV : 723 modes
6/17
VEMSA3D - Comparison - Simulation Results with Measurements : 1/4
Experimental Antenna
Array of 2 dipoles : 73 modes
7/17
VEMSA3D - Comparison - Simulation Results with Measurements : 2/4
Amateur Antenna
"Hentenna" : 109 modes
8/17
VEMSA3D - Comparison - Simulation Results with Measurements : 3/4
Experimental Antenna
Monopole over a counterpoise : 167 modes
9/17
VEMSA3D - Comparison - Simulation Results with Measurements : 4/4
Experimental Antenna
A Monopole over a Counterpoise over a Wired-Disk : 2,594 modes
10/17
VEMSA3D - Comparison with Freeware 4NEC2X : 1/2
Antenna on Airplane
VEMSA3D : 391 modes
11/17
VEMSA3D - Comparison with Freeware 4NEC2X : 2/2
Horn with Bow-Tie feeder, by Pittra and Raida, 2010
1,370 modes from 1,206 segments =< 1,500 max segments of 4NEC2X
12/17
VEMSA3D : Improvements
Old Version 1.0
Short Cross
Antenna
- - - - - - - - - - - - - - - - - - - - - - New version 1.1 - - - - - - - - - - - - - - - - - - - - - - -
Total Pattern
Theta-Pattern
13/17
Phi-Pattern
VEMSA3D - Unique Characteristics : 1/3
VEMSA3D is developed in C++ as /F/L/O/S/S/
Free Libre Open Source Software
Backend
RichWire
Public Domain
GUI
GNU GPL
Graphics
Free
14/17
VEMSA3D - Unique Characteristics : 2/3
Horn with Bow-Tie feeder, by Pitra and Raida, 2010
3,266 points, 4,362 segments => 5,458 modes
15/17
VEMSA3D - Unique Characteristics : 3/3
16/17
VEMSA3D - Main Conclusions
VEMSA3D
- is only limited by computing resources and time,
- is Free Libre Open Source Software Code for everybody,
- is expandable by anyone,
- surpasses any restriction imposed by any authority
on modeling points, segments or modes
of any other Visual Electromagnetics Antenna Simulator,
either freeware or commercialware.
17/17
33rd TSP 2010
VEMSA3D
Source Code, Updated Material
www.antennas.gr/floss
code.google.com/p/rga/
Thank you for your attention
Antennas Research Group, Palaia Morsini, Xanthi, Thrace, Hellas, EU