Go to google and search for Matlab Sonnet. Go to the link that comes up on the Matlab website. Download the Matlab script. Then go to
www.sonnetsoftware.com. Download SonnetLite and install (I work for Sonnet). SonnetLite has no time-out, it is good forever, the problem size for the new version is twice the previous limit. Run the Matlab script. Type in the desired center frequency and input impedance. The Matlab script will run all the required SonnetLite analyses to design your antenna. You can change the Matlab script anyway you want. You can modify the script, for example, to design other circuits too.