Manual

RaDeKL Radar ICD
107-201-001 ISSUE 2.10
MULTISPECTRAL SOLUTIONS, INC. PROPRIETARY AND CONFIDENTIAL
9 of 26
transmissions and the high speed return signal processing. The second component is the
WBT radio front end circuit card with transmitter which provides short pulse
transmissions spanning the frequency range from 6.0 to 6.5 GHz and the receiver radio
frequency front end which conditions the signal for return processing. The last
component is the dual antenna array providing an antenna each for the transmitter and
receiver to minimize the insertion losses of a switch or circulator. Radar performance
characteristics are summarized in Table 1 below.
Table 1: WBT Radar Performance Characteristics (30 mWatt Version)
RF Characteristics Center Frequency 6.35 GHz
Bandwidth 400 MHz (-3dB)
Peak Power 50 mW EIRP
Antenna Gain 12 dBi w/4x4 array
Antenna FOV 40 deg AZ x 40 deg EL
System Performance Primary Power 1.0 Watt (7.2-35 V
supply)
Range Extent 256 range bins
w/variable offset
Range Resolution 1.0 foot
Data Interface USB 2.0/1.1
Physical
Characteristics
Circuit Card Stack Size 2.25 x 3.5 x 0.6 in
w/shield
Individual Antenna Size 2.5 x 2.5 x 0.375 in
Circuit Card Stack Weight 80 grams
Individual Antenna Weight 25 grams
MSSI’s patented radar operates by transmitting and receiving a single WBT pulse. Upon
transmission, the digital processor initiates a timer/counter. The receiver RF front end
filters and amplifies the return, passing the signal to the high speed diode amplitude
detector. After a measured time has elapsed corresponding to the minimum range to
initiate detection, the diode detector video output is compared to multiple voltage
threshold levels to determine relative signal strength return. The video stream is sampled
with one nanosecond time steps corresponding to six-inch radar range bins. This receiver
processing technique permits a fast and simple analog-to-digital conversion of the return
signal amplitude over the entire range space in one transmitted pulse. Since the receiver
measures return signal power amplitude, the receiver does not depend on relative motion
of the target but rather only its presence. As a consequence, the detector is capable of
detecting very slow moving targets. The above process is repeated and signal magnitude