How to calculate the frequency of antenna with guided wavelength and slot length?

dear all,

i have attached one ieee paper. in that they explained the opration of the antenna wit the guided wavelength and slot length. how to calculate? i want to get mathematical calculations to get the frequency of operation.

with thanks in advance,

KBMani.

Added after 59 seconds:

---paper attached-----

dear all,

can anyone of u explain how to calculate the resonant frequency of the CPW fed slot antennas? give me some good refernces and books for this.


with thanks,
kbmani