How to increase the BW of a patch antenna design?

Hi,

I am doing a design of rectangular patch antenna with inset feed and simulation on HFSS.
the problem is the BW is very small,so what should i do to increase BW?
Thanks

I think you can tune the position of inset feed. It's a methed of improving the matching

Hi,

please can any one till me the steps to simulate patch on HFSS ,
to see s11 curve ,radiation pattern,far field,.......

Thanks

you can refer to link:
http://rapidshare.com/files/35218258..._book.pdf.html
this pdf file is very good in learn hfss.

Patch antennas are typically narrow band devices. Increasing the thickness and decreasing the dielectric constant can sometimes help.