HELP : Design a new ultra-wide band antenna element

I need help to produce a new ultra wide band antenna element that can operate from a range of 300MHz to 26GHz..

Please provide any reference and HFSS simulation if there is..
Thank You!

Hi,

If you have ADS (a challenger to HFSS), I guess to remember there are some models, i.e., some examples " all made ".

Good luck.