"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
'P' to 'Pea' 'Pen' to 'Pol' 'Pow to 'Pulsedd', 'Pulsedl to 'Pz'
PALMER SCAN: Conical scan superimposed on another type of scan pattern - usually a spiral pattern.
PARABOLIC ANTENNA: An antenna consisting of a parabolic reflector and a radiating or receiving
element at or near its focus. If the reflector is in the shape of a paraboloid, it is called a paraboloidal reflector.
PARABOLIC REFLECTOR: An antenna reflector in the shape of a parabola. It converts spherical
wavefronts from the radiating element into plane wavefronts.
PARALLEL-CONNECTED DUPLEXER: Configuration in which the tr spark gap is connected
across the two legs of the transmission line one-quarter wavelength from the Tjunction.
PARAMETER: A quantity which may have various values, each fixed within the limits of a stated case or discussion.
In the present case, some examples of parameters; would be: radar frequency, limited by the tuning range of the radar.
PARASITIC ARRAY: An antenna array containing one or more elements not connected to the
transmission line.
PARASITIC ELEMENT: A directive element that is not connected to a radio transmitter or
receiver either directly or via a feeder, but is coupled to the driven element only by the fields.
PASSIVE ANGLE TRACKING: Tracking of a target using radiation from the target (such as jamming), with no
radiation from the radar itself. Only angular tracking is possible under these conditions since no measurement of time of
travel of radiation to the target is possible, as is required to obtain target range.
PATH: In communications systems and network
topologies, a route between any two points.
PAWSEY STUB: A device for connecting an unbalanced
coaxial feeder to a balanced antenna.
PC (PULSE COMPRESSION): The process used in search and tracking pulse radars whereby the transmitted
pulse is long, so as to obtain high average transmitter output power, and the reflected pulse is processed in the radar receiver
to compress it to a fraction of the duration of the transmitted pulse to obtain high definition and signal strength enhancement. Pulse compression may be accomplished by sweeping the transmitted frequency (carrier) during the pulse. The returned signal is then passed through a frequency-dependent delay line. The leading edge of the pulse is therefore
delayed so that the trailing edge catches up to the leading edge to produce effectively a shorter received pulse than that transmitted. Pulse compression radars are also referred to as CHIRP radars. Other more sophisticated pulse compression
techniques are also possible and are becoming more popular.
PEAK ENELOPE POWER: The average power supplied to the
antenna transmission line by a transmitter during one
radio frequency cycle at the crest of the modulation
envelope taken under normal operating conditions.
PEAK POWER: Maximum power of the rf pulse from a radar transmitter.
Next set of "P" terms.
