User's Manual

SECTION 5—GENERAL THERORY OF OPERATION
5.2
5.1 GENERAL
The Raptor RP-1 moving radar system transmits a K or Ka-
Band radio frequency in compliance with the Federal
Communications Commission (FCC) regulations.
CIRCUIT DESCRIPTION:
Antenna Description (K-Band) : The Raptor RP-1 employs
a Doppler Radar Transceiver Module (integrated antenna
and micro-wave transceiver). The antenna element is a
Microstrip Patch Antenna Array (MSPA). The antenna has
one transmit and one receive array sections of connected
patch elements. The transceiver is an integrated microstrip
design containing the transmitter, low noise amplifier,
receiver mixers (I/Q), and pre-amplifiers. An electronic
board inside the antenna housing contains the power supply
and Automatic Level Control (ALC) circuitry. The output
signals from this antenna module are the I/Q Doppler
signals.
Antenna Description (KA-Band) : The Raptor RP-1
employs a Doppler Radar Transceiver Module (integrated
micro-wave transceiver). The single antenna element is a
circular horn and lens type. The transmit and receive
sections are isolated by employing a turnstile junction in
the microwave wave guide. The microwave transmitter is a
Gunn effect oscillator placed at one port of the turnstile
junction. A pick-up probe at the other port of the turnstile
junction feeds the dual (I/Q) microstrip mixers. An
electronic board inside the antenna housing contains the
power supply and pre-amplifiers, filters and Automatic
Level Control (ALC) circuitry. The output signals from
this antenna module are the I/Q Doppler signals.
Processing Unit Description : The outputs from the antenna
modules are connected to an antenna switch, to select the
active antenna between front and rear. The signals from
the active antenna are converted from continuous analog to
discrete digital samples by the analog to digital converter.
These digital samples are use by the DSP for all target