Radar System Engineering

SEC. 11.12] ILL USTRA TIVE EXAMPLES OF R-F HEADS 429
tions so that they may be quickly removed for servicing or replacement
with spare units. Remote metering of magnetron current, radar crystal
current, and beacon cavity crystal current is provided.
Shipborne Air-search Set.—The final example is the r-f unit of a
high-power shipborne set for maintaining air surveillance. The r-f head
~“-”’--—–”--
——-—.._ .
1
-j
-h
:. A
FIG.11.30.—Front view of r-f head, shipborne radar: (a) pulse input; (b) transmitter
compartment, search radar; (c) receiver, search radar; (d) ATR mount; (e) AFC mixer;
U) radar n,ixer; (o) TR-tube mount; (h) r-f switch for noise source; (i) receiver, height-
Iinder radar; (j) duplexer, height-finder radar; (k,l) built-in control and test equipment.
illustrates many points of good design applicable to high-power sets in
the 10-cm region whether shipborne or not. Figure 11.30 shows a front
view of the r-f head.
This equipment is a dual set with separate radars on different
frequencies; o~e for long-range search and one for height-finding. The
two antennas are mounted on a turret about 5 ft in diameter which contains
the r-f head and has room for an operator during tests The