Patent ID: 6046697
Filing Date: 2000-04-04
Classification: H01Q

Abstract:
A method of monitoring an antenna array comprising a plurality of antenna elements each of which is connected to one end of a respective signal path, each of the other ends of which are connected to a beam forming circuit, the method comprising the steps of:a) selecting one of the elements of the array;b) applying a first signal of known characteristics to said other end of a respective signal path;c) detecting at the one end of the said signal path a second signal resulting from the application of said first signal to said element;d) comparing the detected second signal with the applied first signal whereby to generate an error signal corresponding to any changes in the characteristics of the applied signal due to the signal path;e) using the error signal to access a stored value in a look-up table; andf) repeating steps a) to e) for each element of the array.