Multi-band High Efficiency Power Amplifiers Using Metamaterial-Based Elements

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Metamaterials are artificial materials which have physical and electrical properties not existing in natural materials. There are two main design approaches for metamaterial-based microwave devices: the resonance-type approach and the artificial transmission line approach. In this proposal, new metamaterial cells and inclusions based on the two aforementioned design approaches are proposed. These inclusions and cells have many advantages over conventional implementations and overcome many limitations related to well-known inclusions and cells found in the literature. The advantage of using coplanar waveguide (CPW) transmission lines and their discontinuities are utilized. Besides of reducing the microwave components size, theses inclusions/cells give the possibility of designing multi-resonant inclusions. The research will be focused on a feasibility study of implementing these inclusions to design multiband power amplifiers in accordance to certain base station specifications.