The feed system of microstrip antenna array

Hello!
I need your advice.
Design microstrip array is shown on this image.
[url=http://images.elektroda.net/72_1333004259.jpg]
Here linear symmetric phase error grow at boundary of frequency range. It leads to distortion of the main beam.
[url=http://images.elektroda.net/85_1333006268.jpg]

My question: how to feed the array to reduce the linear phase error?

Thank you.

Hello Marat86

As you have seen the feed location and system are presented in the image. so what are you asking precisely, because the question is quite ambiguous.

Regards
Elchiquito

elchiquito, thank you for your attention.

Patch elements are spaced with L.

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L is the wavelength equal to the center frequency. Frequency range is 10...11 GHz.
Phase distribution along array is determined by wavenumber k=2Pi/L. So, the phase difference is a multiple of zero or 2Pi at the central frequency. But phase difference between the patches isn"t zero or 2*Pi at the other frequency. And this error grows with increasing order number of elements. So, linear symmetric phase distribution occurs along array. This phase error is significant for this size of the array and frequency range.

I am interested possible variants of feeding of radiators to reduce phase errors.

I assume the following feeding system:

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