Advanced cross polar source diagnostics based on the equivalent currents reconstruction from measured data

The equivalent current (EQC) technique applied on antenna measurements has been demonstrated to be an efficient tool for diagnostics in many measurement situations [15]. Indeed the equivalent currents can be applied in tasks such as the filtering of disturbances such as undesired coupling with the supporting structure or the feeding and in NF-NF transformation. In particular the filtering capabilities have been efficiently demonstrated for suppressing the disturbances due to the presence of the feeding cable and of the mounting support in the measurement set-up in a sleeve dipole and a TT&C antenna [6]. The study was focused on the analysis of the co-polar component of the radiated field. Starting from the past results [6] we present in this paper a new study of the TT&C antenna extended also to the diagnostic of the cross-polar antenna sources.

[1]  L. J. Foged,et al.  Comparative measurements and inverse source technique for validation of compact cylindrical NF ranges , 2012, 2012 Loughborough Antennas & Propagation Conference (LAPC).

[2]  Giuseppe Vecchi,et al.  Suppression of Undesired Radiated Fields Based on Equivalent Currents Reconstruction From Measured Data , 2011, IEEE Antennas and Wireless Propagation Letters.

[3]  F. Saccardi,et al.  Design improvements of electrically large antennas using the inverse source method , 2013, 2013 Loughborough Antennas & Propagation Conference (LAPC).

[4]  F. Saccardi,et al.  Investigation of Spherical higher order modes sources in antenna measurement probe design , 2015, 2015 9th European Conference on Antennas and Propagation (EuCAP).

[5]  F. Saccardi,et al.  Investigation of complex excitation errors at single element and sub-array level in large array antennas by inverse source technique , 2014, The 8th European Conference on Antennas and Propagation (EuCAP 2014).

[6]  F. Saccardi,et al.  Practical Application of the Equivalent Source Method as an Antenna Diagnostics Tool [AMTA Corner] , 2012, IEEE Antennas and Propagation Magazine.

[7]  G. Vecchi,et al.  Improved-Accuracy Source Reconstruction on Arbitrary 3-D Surfaces , 2009, IEEE Antennas and Wireless Propagation Letters.