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Metamaterials for Miniaturization of Narrowband and Ultra-Wideband Antennas It is well-recognized that materials design holds a promise in developing novel antennas that are much smaller and enable greater multi-functionality than ever before. Such needs stem from the unprecedented growth of commercial wireless communications and related research is highly fueled by growth in commercial and defense multi-band and high bandwidth future communication systems. This presentation will discuss how modified materials, inductive/ capacitive lumped loads and low loss magnetic materials/crystals (metamaterials) are impacting antenna design with the goal of overcoming miniaturization challenges (viz. bandwidth and gain reduction, multi-functionality etc.). Dielectric design and texturing for impedance matching has, for example, led to significant size reduction and higher bandwidth low frequency antennas. Also, recent magnetic photonic crystals (MPCs) and non-magnetic versions of these crystals hold a promise for antenna/array miniaturization. Formal design methods incorporating local, global or hybrid optimizers play an important role in materials design. Such algorithms and their role in antenna and other radio frequency (RF) applications will play a critical role in materials design. Practical realizations of these new materials are poised to challenge computational and design methods for a variety of RF applications. |
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