Study on Design Techniques of Miniaturized High-Performance Antennas for Next-Generation Wireless Communication Systems

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Next-generation wireless communication systems for the purpose of achieving ultra high-speed data transmission in mobile communication environments have attracted considerable attention in recent years. MIMO and UWB play important roles as key technologies in realizing the next-generation wireless communication systems. The achievements obtained in this study are the developments of effective way for constructing miniaturized antennas that may be useful for high-speed wireless communication systems based on MIMO and UWB technologies. Techniques for realizing small and high-performance MIMO antennas that can be used in various kinds of miniaturized mobile terminals have been developed in this study. In addition to these achievements, design techniques of miniaturized antennas having ultra-wideband characteristics have been developed for the case where the both of MIMO and UWB techniques are used in the same time in high-speed wireless communication systems.