I want to design a Bow tie antenna. But I am looking for a certain equation or Formula, where I can calculate the parameters like length, angle etc for a Bow tie antenna to design at certain Frequency. Like I am interested to design at 2.4 GHz, what should be the length, angle, width of the Bow tie antenna?
I would start with the total length of lambda/2, and assign an angle of 60 degrees. Later using some EM tool like CST you can get the optimum response.
I sent to you three pdf's from Antenna Magus, with some further info on this sort of antenna. At the end of each there are some hints on the optimization, as well as references in case you need them.
Just get to your EM software and start with some rough dimensions, soon you'll get an acceptable design.