Effect Study of a Ring on the performances of a patch antenna

In this paper, the behavior of a ring on the performonce of a patch antenna a is to dincrease the Bandwidth and to change the frequency of resonance towards less frequencies. The patch antenna is planar antennas generally made on printed circuits. They are commonly used in mobile communications because of their small size and ease of integration. They consist of a radiating element, a ground plane and a dielectric substrate of permittivity (εr) and permeability (μr), The simulated results are obtained from CADFEKO a Method of Moments Model-Based Solver.