We use the well-known Feynman path integral to model Ratio Cognitive (RC) strategies in wireless communications. Since RC is a crucial methodology to optimize the arrival of signal to terminal or sensing device, we associate the concept of propagation of the information under the view of the Green's function or space-time propagators inside the theory of the Feynman path integral. We have derived relationships that allows us to estimate the Bit Error Rate of diverse geometrical topologies of RC.