I have to build in cst studio (student edition) a patch antenna with a coaxial. The ground and the dielectric must be 100x100 mm. The metal thickness must be 0.035mm and as dielectric we use a rogers ro4350B (lossy). The thickness of the dielectric must be 0.2 or 0.5 or 1 mm. The frequency must be 6Ghz. I m asked to achieve a bandwidth 200Mhz @-10dB in s11. The best i did its 140Mhz. Can anyone please help me?