monopulse


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monopulse

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In a monopulse radar, the antenna has four multiple beams. The four antenna signals are combined in the beam former to give a signal corresponding to the sum i.e., A + B + C + D, vertical difference beam, i.e., (A + D) − (B + C) and a horizontal difference beam, (A + B) − (C + D). The sum beam and vertical difference beam patterns are shown above. When these sum and differences are compared in the processor shown above, both the amount of target movement off the antenna boresight and its sense, that is up and down, can be found. This is simultaneously sensed in the horizontal plane and the results used to drive the antenna onto the target direction.
A radar technique using four overlapping pencil beams. Two of these are for azimuth, while the other two are for elevation. The overall circuitry is such that when the target is in the center, there is no current flowing in the system.
References in periodicals archive ?
To synthesize monopulse [SIGMA] and [DELTA] patterns in the azimuth plane, a linear array is arranged along the X-axis.
Poli, "Synthesis of monopulse sub-arrayed linear and planar array antennas with optimized sidelobes," Progress In Electromagnetics Research, Vol.
Monopulse autotrack feed patterns are unaffected by the subreflector.
It provides an outline of modern primary radar sensor systems and covers the theory and evolution of secondary surveillance radar and the development of monopulse processing.
The high performance, cost-effective product line features fully automated signal processing with an innovative digital receiver architecture and high accuracy monopulse interferometers to meet demanding ISR requirements.
The company will supply six co-mounted Perimeter Surveillance Radars (PSR) and Monopulse Secondary Surveillance Radars (MSSR) in the South Region of the country and one additional PSR for the Oriental regions main hub.
The amplitudes being used are for a typical orientation (side on, with a 45 degree barrel tilt with respect to the incident electric field polarisation), and performing a convolution of this time series data with the monopulse assumed emitted by the antenna.
The feed is the dual-band (X- and S-band) single-channel monopulse tracking-feed mounted in Cassegrain configuration to derive the tracking error signals for driving the antenna in a direction to nullify this error.
Three approaches are usually considered when giving a AOA-measurement (also known as direction-finding, or DF) capability for monopulse RF signals to a given military platform: (1) the amplitude-difference approach, (2) the interferometer approach and (3) the time-difference-of-arrival (TDOA) approach.
5 million deal with Raytheon for three Monopulse Secondary Surveillance Radar (MSSR) systems.
Telephonics also supplies fixed and mobile Monopulse Secondary Surveillance Radar currently in use in several sites throughout China.
Limited Tenders are invited for Development And Realisation Of Imaging And Monopulse Rf Seeker