Abstract
Current mobile communications technology relies heavily on efficient design of antennas, where the operational characteristics of the wireless communication systems are largely dependent on the directional specifications of the antenna. Consequently, the antennas that can be flexibly tuned to operate over a reasonable wide band of frequencies are of greatest interest for efficacious designs of mobile communication devices. In this research paper, a proposed model for an electromagnetically frequency tunable antenna that can cover a wide range of operating frequencies is presented. This design is based on altering the electromagnetic properties of the ferrite material that forms the antenna. It is shown that the resonance frequency of the proposed model can be adjusted by altering one of the main electromagnetic properties of the ferrite material of the antenna; that is its permeability. This can take place without introducing any modifications to the physical dimensions of the antenna. The proposed approach provides flexible operation of the antenna over a reasonable range of operating frequencies, which in turn results in an overall improvement in the performance of the mobile communication systems.
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