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Martello S-723

The Marconi Radar Type S.723 is an D-Band, long range, transportable 3D surveillance radar system designed for world-wide use in military applications.

The Antenna is a planar array, consisting of a stack of 40 linear arrays and is rotated at six revs/min about a vertical axis to provide all round surveillance. Each linear array is fed with R.F. modules power from its own solid states power amplifier module. The R.F. modules are fed with the appropriate power level from a single similar R.F. module and phased so as to produce the required vertical transmit radiation pattern.

Each linear array has an associated receiver and the return signals are converted to the system IF and amplified before being passed to a beam formign system. The individual are combined in this unit to form a stack of six simultaneous surveillance and height-finding beams whitch provide cosecant squared cover to above 20°.

The output signals from each processor channel are thresholded and combined to give the best available signal in the prevailing clutter, chaff and ECM conditions. This video can displayed on ppi-scopes in a co-located Operations Room.

The beam output signals are also passed to a Plot Forming Unit where target plan position and elevation angle are extracted and then to a Plot Processor whitch calculates target height. The Plot Processor correlates the primary radar plot data with plot data from the SSP system and generates a 3D plot message for sending to a remote display and tracking system.