Application of non-uniform FDTD method to PCS antennas

There has been tremendous worldwide activity aimed at developing wireless personal communications systems (PCS). With these developments, antennas must meet tougher requirements such as smaller size, attractive appearance, and good gain. Since the frequency for the PCS is in the lower end of the microwave spectrum, the size requirements forces one to deviate from a traditional antenna design. The main feature of the proposed antennas is the small size. One feature affected by the size of the antenna is the polarization but this is not a stringent requirement in PCS. The FDTD technique is adopted for use in simulating the performance of the antennas proposed.