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Size reduction of ultra-wideband (UWB) antenna structures with taking into account matching, efficiency, and radiation pattern constraints is considered. We discuss design trade-offs between the minimum attainable antenna size and its electrical and field properties. The best possible trade-offs are obtained using rigorous numerical optimization of all geometry parameters of the structure at hand...
Miniaturization of UWB antennas using EM-driven optimization is investigated. We demonstrate that formulating the design problem as direct size reduction task with constraints on electrical performance parameters does not lead to optimum results due to the fact that in a typical UWB structure only a few geometry parameters explicitly determine the antenna footprint. An alternative design methodology...
In this paper, size reduction of antenna structures taking reflection response and total efficiency into account has been investigated. In order to find available design trade-offs concerning the antenna footprint, its wideband matching, and efficiency, numerical optimization has been employed. Appropriate formulation of the objective function permits identification of the designs that exhibit the...
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