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.