International Symposium on Antennas and Propagation


Session Number:3C26



An Electromagnetic Band Gap Structures for Ultra Wide Band Antennas.

T.Masri,  M.K.A.Rahim,  


Publication Date:2008/10/27

Online ISSN:2188-5079


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A modern generation short-range wireless communications technology namely the Ultra Wide Band (UWB) systems, operates at an extremely wide range of frequencies from 3.1 GHz up to 10.6 GHz and allows high rate data transmissions. It can reach above 2Gbits/s with low power consumptions and have to be managed in a way that permits optimal spectrum usage at a limited transmits power of -41 dBm/MHz, as mandated by the FCC, ensuring protection of licensed services against potential interferences [1]. Given the identified bands and failure to comply with the regulations aforementioned, UWB systems could become a potential jammer for the numerous licensed services. It is an option and will be much favourable if the UWB antenna has a capability to be ‘tune’ to work at a certain allocated band of frequencies and reject partially those unneeded ones, where, the radiating power will be reduced to a level that will not intrude any existing channels. In such a way, UWB systems will certainly not be a threat to the already operating applications. To accomplish this objective, the authors proposed an active and passive 2D Electromagnetic Band Gap (EBG) structure(s) that exhibit ‘band stop’ characteristics, that can be incorporated into UWB antennas and act as a ‘band rejecter’.