AVTIS - The Antenna
Who are we?
The workshop and exhibition
Resources and information
St Andrews <

Imaging <
The Basics

Applications <
The Universe
Brijot Imager
Car Radar
Debris Detection
Aircraft Landing
External links
Photo gallery

In this section:

> 1. Intro
> 2. The Instrument
> 3. The Antenna
> 4. As a Radar
> 5. Seeing the Volcano
> 6. Measuring
> 7. Data Stacking
> 8. A Scan
> 9. Colour Code
> 10. The Volcano
> 11. Pyroclastic Flows
> 12. Devastation
> 13. The Future

The antenna is a device for collecting the incoming mm-waves and channelling them into the radar detection box behind. There are three main parts to the antenna: the main dish, the sub-reflector and the feedhorn. The main dish is specially shaped so that the incoming mm-waves are reflected back onto the subreflector no matter which part of the dish they hit. The subrefelector has a similar job, reflecting the mm-waves again so that they are focussed at the feedhorn. The feedhorn is basically a hollow metal cone about a centimetre across at the open end. Once the mm-waves are inside the feedhorn, the cone gets slowly narrower and the mm-wave signals are concentrated into a small rectangular metal pipe inside the radar box and can then be fed to the signal detector.

'Vision For The Future' is an EPSRC funded project run by the MMW group at the University of St Andrews
Copyright ©2006 by the University of St Andrews :: web, graphic and exhibition design by FifeX Ltd, www.fifex.co.uk