ELRA - Experimental phased array radar

An experimental electronic steerable array radar system (ELRA) is developed as a research tool for investigations related partly to multifunction operation and adaptive signal processing. To obtain a great flexibility, separate active phased arrays have been chosen for transmitting and receiving. In connection with the large quantity of components employed, the use of efficient monitoring and diagnostic equipment is mandatory. One basic property of ELRA is related to the automatic correction of phase differences between the modules. By properly matching the bandwidth, the phase shifter control and the sample rate, the receive array generates up to six independent simultaneous beams. Variable beam forming is possible by weighting the subarray signals.