Co and cross polarizations in CST revisited

Hi all,
Following the directions in CST MWS help, I plotted the co and cross polarization components for a simple microstrip p@tch antenna. The plot in the H-plane looks very good.( about -15 dB cross polarization levels and about 6 dB co polarization level.) . Howecver, in the E-plane, it is showing a cross polarization level only -80 dB while co polarization is okay at about 6 dB again. Is this result believable ? I have seen cross polarization levels quite higher than this in the papers ( measured ) . Exporting the E-fields to Matlab and processing it and plotting also gives the same results. Any comments ?

-svarun

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