Target Tracking - MATLAB Simulations for Radar Systems Design - page 399

error signals (azimuth and elevation) are functions of the targetÓs RCS; they are
functions of its angular position off the main beam axis.

In order to illustrate how conical scan tracking is achieved, we will first con-
sider the case shown in Fig. 9.4 . In this case, as the antenna rotates around the
tracking axis all target returns have the same amplitude (zero error signal).
Thus, no further action is required.

ϕ

ω s

rotating
feed

Figure 9.2. Conical scan beam.

Az & El
servo Amp

servo motor
drive

transmitter duplexer

elevation

error

detector

mixer &
IF Amp.

envelope
detector

AGC

scan motor &
scan reference

azimuth

error

detector

Figure 9.3. Simplified conical scan radar system.