Patent ID: 6140962
Filing Date: 2000-10-31
Classification: G01S,H01Q

Abstract:
A phased array antenna system for radar applications, comprising:at least two phased array antenna faces configured to produce RF transmitter pulses, each antenna face provided with an array of active T/R modules, and each T/R module being provided with an RF amplifier for producing RF pulses of an at least substantially constant amplitude;a supply network configured to provide the T/R modules with an RF input signal; anda control unit configured to generate control signals for individual of the T/R modules, wherein the control unit generates one gate pulse for activating all RF amplifiers of an antenna face, and each T/R module is provided with delay means for delaying the gate pulse with a delay, selected from a predetermined time interval such that in response to a leading edge of the gate pulse a number of active of the T/R modules gradually increases and in response to a trailing edge of the gate pulse the number of active of the T/R modules gradually decreases, for providing produced RF transmitter pulses with selected rise and fall times for minimizing occurrence of crosstalk to another antenna face.