Patent ID: 8674874
Filing Date: 2014-03-18
Classification: G01S,H01Q

Abstract:
1. A method for calibrating an array antenna having a plurality of branches comprising: generating a test signal using a pseudo-random sequence assigned to one of the plurality of branches for each of the plurality of branches; adding the test signals to a useful signal of the antenna so as to form a summed signal emitted via the array antenna; receiving the summed signal with a receiver antenna; correlating the received summed signal with a replica of the pseudo-random sequence so as to produce a correlation result using a correlator; estimating a characteristic of one of the plurality of branches by processing the correlation result; calibrating the antenna based on the estimated characteristic; and deducing a delay and losses and a phase shift in a receiver path starting from an output of the receiver antenna to an input of the correlator, the deducing including: