Biomedical Engineering Reference
In-Depth Information
T/R
module
Array
element
Array processor
T/R
module
Array
element
Signal generator
(and modulator)
T/R
module
Array
element
To
T/R
modules
Array controller
FIGURE 2.4
Typical phased array radar configuration.
Transmitter
Duplexer
Antenna
Processor
Receiver
Beam-
steering
network
Control and
display
network
FIGURE 2.5
Block diagram of a typical radar system.
data obtained from reflected signals by the array processor into a format for
display to the system operator.
The distributed nature of the radar formation in Figure 2.4 yields several
operational advantages over conventional radar systems. For instance, by
dividing the power amplification duties over what is typically thousands
of T/R modules, solid state amplifiers may be used instead of tube-based
amplifiers. This provides a decrease in size and cost per amplifier and an
increase in reliability.
Another advantage realized in phased array radar designs is high-speed
beam steering and radiation pattern control. Since the beam characteristics
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