In situ array antenna diagnosis using microwave circular holography

This paper is presenting a circular microwave holography algorithm for the troubleshooting of in-service phased array antennas in situ. The algorithm is one dimensional and the arrays are either linear or planar. First the algorithm for the estimation of array element excitations from circular near field measurements is built step by step. The performance in terms of accuracy is then studied in simulation. The results demonstrate an excellent potential for fault finding.