Antennas Research Group / Democritus University of Thrace

VEMSA3D

A floss Visual ElectroMagneticsSimulator for 3D Antennas

33rd TSP 2010

Christos Koutsos, Nikolitsa Yannopoulou and Petros Zimourtopoulos

2/17

VEMSA3D - Ancestors : 1/2

ThinWire 1980

RichWire 1990

3/17

VEMSA3D - Ancestors : 2/2

WWW Virtual Reality 1995

RadPat4w 2000

4/17

VEMSA3D - The Starting Window

5/17

VEMSA3D - Menus and Dialog Boxes

6/17

VEMSA3D - Simulation Results : 1/2

Industrial StandardThe Half-wave Dipole : 9 modes

2D and 3D E - U Radiation Patterns

7/17

VEMSA3D - Simulation Results : 2/2

Commercial Antenna

HUF TV : 723 modes

8/17

VEMSA3D - Comparison - Simulation Results with Measurements : 1/4

Experimental AntennaArray of 2 dipoles : 73 modes

9/17

VEMSA3D - Comparison - Simulation Results with Measurements : 2/4

Amateur Antenna"Hentenna" : 109 modes

10/17

VEMSA3D - Comparison - Simulation Results with Measurements : 3/4

Experimental AntennaMonopole over a counterpoise : 167 modes

11/17

VEMSA3D - Comparison - Simulation Results with Measurements : 4/4

Experimental AntennaA Monopole over a Counterpoise over a Wired-Disk : 2,594 modes

12/17

VEMSA3D - Comparison with Freeware 4NEC2X : 1/2

Antenna on Airplane

VEMSA3D : 391 modes

13/17

VEMSA3D - Comparison with Freeware 4NEC2X : 2/2

Horn with Bow-Tie feeder, by Pittra and Raida, 20101,370 modes from 1,206 segments =< 1,500 max segments of 4NEC2X

14/17

VEMSA3D : Improvements

Old Version 1.0

- - - - - - - - - - - - - - - - - - - - - - New version 1.1 - - - - - - - - - - - - - - - - - - - - - - -

Short Cross Antenna

Total Pattern Theta-Pattern Phi-Pattern

15/17

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

16/17

VEMSA3D - Unique Characteristics : 2/3

Horn with Bow-Tie feeder, by Pitra and Raida, 20103,266 points - 4,362 segments 5,458 modes

17/17

VEMSA3D - Unique Characteristics : 3/3

18/17

VEMSA3D - Main Conclusions

VEMSA3D

- is only limited by computing resourves 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.

33rd TSP 2010

VEMSA3DSource 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