NEC-LIST: design a wide band and 2-band corner reflector

Hi, all
I found a reference written by L. B. Cebik, W4RNL in http://cebik.com/crn.html, in which a 2-band version of the corner reflector is introduced.
But because the antenna uses 2 dipole drivers, its band is narrow.
I wonder whether it's feasible to design a wide band and 2-band corner reflector by using bow-tie drivers.
For example, a corner reflector covers both 700MHz-1100MHz and 1700MHz-2200MHz.
Does anybody give me some suggestions or recommend me some references? Thanks in advance.

                           xingc

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