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In this paper we present a frequency reconfigurable LTE MIMO antenna for automotive applications, based on the characteristic mode theory. Capacitive coupling elements are used for the excitation of surface wave modes of the given chassis in order to design an uncoupled two port antenna system. A feeding network with a reconfigurable LTCC impedance matching is presented and evaluated.
In this letter, it is shown how the behavior of a capacitive coupling element (CCE)-based mobile terminal antenna can be modeled at the UHF band as a combination of the separate wavemodes of the structure. The proposed equivalent circuit model improves the general understanding of the operation of the antenna structure. It can be used for analyzing the combined performance of the capacitive coupling...
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