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US 6,140,962 AGranted
Antenna system
AssigneeHollandse Signaalapparaten B.V.
InventorAlbert Groenenboom
Life of this patent
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Abstract
A multiface phased array antenna, with each antenna face being provided with a plurality of T/R modules. To preclude the occurrence of crosstalk among the different antenna faces, caused by the steep edges of transmitted RF pulses, these pulses are delayed per T/R module with a delay selected from a predetermined time interval.
Claims5
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;
- and
- a 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.
1 more element
Dependencies are inferred from the claim text.