Main Radar Home

Radar theory Home

AP3302 Pt3 Contents

AP3302 Pt3 Section 1 Contents

 Contact the Editor

AP 3302 Pt. 3

Section 1

CHAPTER 2

Basic Requirements Of A Pulse-Modulated Radar System

This may be done by the transmit-receive (T-R) switch, the action of which is illustrated in Fig 7. Although the T-R switch is represented here by the conventional symbol for a switch, in practice it is an electronic device which operates automatically. Normal mechanical switches or relays cannot be used because of the very high rate of switching.

 

Output to indicator. We have seen that information on the angular position of the aerial is conveyed to a p.p.i. for indication of bearing in azimuth, and information on the angle of tilt is conveyed to a range-height indicator for indication of bearing in elevation. This is done by one of the remote position indication systems discussed in Part 1 of these notes, i.e. Desynn, M-type or synchro systems. A typical arrangement is illustrated in Fig 8.

Receiver

The receiver amplifies the reflected pulses picked up by the aerial. After amplification the pulses are demodulated and the resulting d.c. pulses are applied to the indicator c.r.t. for 


 

Previous page

To top of this page

Next Page

Constructed by Dick Barrett
Email:
editor@ban_spam_radarpages.co.uk

(To e-mail me remove "ban_spam_" from my address)

ęCopyright 2000 - 2002 Dick Barrett

The right of Dick Barrett to be identified as author of this work has been asserted by him in accordance with the Copyright, Designs and Patents Act 1988.