Compensation of mutual coupling in dual polarized arrays

Mutual coupling in dual polarized antenna arrays is compensated by matrix multiplication. Using farfield measurement data, a least squares estimation of the coupling matrix is made including co- and cross-polar coupling. A compensation for measurements off the phase center is important as well as a proper assumption of the ideal element pattern. We study the performance of a dual polarized patch array with respect to far-field phase error and cross-polarization level and the performance of the compensation method exceeds or equals the use of dummy elements.