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A pattern control for portable devices at 2.45 GHz is proposed by exploiting phase-shifted characteristic modes (CMs). Among all available orthogonal CMs, the pattern control of a rectangular conductive plane has been obtained by a weighted linear superposition of only two current modes (J4 and J8). A proper position of two capacitive coupling exciters (CCEs), hosted above the rectangular conductive...
In this paper a multiband MIMO antenna suitable for long term evolution (LTE) and wireless wide area network (WWAN) application is presented. The MIMO antenna consists of two symmetric antenna elements, neutralization line and modified ground plane printed on a printed circuit board (PCB). The size of each radiators are 15 × 25 × 4 mm3. To maintain the compactness, radiating elements are folded at...
A compact four-port multiple input multiple output (MIMO) antenna system is proposed operating in C-band at 3.5 GHz (3400 ∼ 3600) for future fifth generation 5G technology mobile broadband services. The four-port MIMO antenna system consist of an Inverted-L(IL)shape monopole on the edges of non-ground portion of 9×9 mm2 with substrate FR-4 and ground plane of dimensions of 136×68 mm2. The compact...
In this paper we discuss the feasibility of an online failure detection algorithm for large linear arrays for massive MIMO applications. By means of a numerical optimization of the position of few near field probes, a good failure detection performance has been verified.
We present an approach for the maximization of the MIMO channel capacity. The proposed scheme is based on the optimization of the singular values of the channel scattering matrix by properly facing the main computational key points of the problem. The approach is GPU-based, the propagation environment is described by an ultrafast Geometrical Optics (GO) approach, the singular values are computed by...
Two-element ultra-wideband (UWB) multiple input and multiple output (MIMO) antennas are presented to obtain high isolation. The designed UWB-MIMO antennas are composed of two identical orthogonal antenna elements, and a defected ground structure with I-shaped slot and a pair of L-shaped stub are employed to get better isolation. Bandwidth of the proposed antennas range from 3.28 GHz-12 GHz. Also,...
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