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This contribution presents a novel 3-D circular conformal MIMO antenna system composed of three magneto-electric dipoles (MED) antennas. The single MED element was delicately designed to include one main (lower-band) dipole and two auxiliaries (upper-band) dipoles in order to achieve the dual-band radiation. The proposed MED owns a low-profile conformal geometry but features a wide H-plane beamwidth (minimum 103 •). By embedding the metamaterial of the broadside-coupled E-shaped unit cells into the magnetic dipole, the height of MED can be dramatically reduced by 37.2% as compared with the conventional ones. Meanwhile, the two U-shaped notches together with a rectangular notch were included onto the E-dipole to create a band-notch, which offers the anti-interference capability to the ubiquitous 2.4-GHz signal of the wireless local area network. According to the measurement results, the MED element exhibits an impedance bandwidth of 54.2% (1.68-2.93 GHz) with a stable gain of 6.05±1.15 dBi in the lower band and 9.2% (3.32-3.64 GHz) with 5.71 ± 0.7 dBi in the upper band, respectively. Moreover, the threeelement MIMO system provides quasi-omnidirectional coverage in the H-plane from 1.68 to 3.64 GHz. The outstanding performance metrics validate the proposed ME dipole antenna that is well suited for the future sub-6-GHz fifth-generation MIMO mobile base stations. INDEX TERMS Conformal antenna, magneto-electric dipole, miniaturization, MIMO antenna, 5G base-station antenna. I. INTRODUCTION With the increasing demand of high-speed data transmission and the coexistence of different kinds of communication networks, multi-frequency and wideband mobile communication systems have become a hot research area. In China, the frequency bands of 0.81-0.96 GHz and 1.71-2.69 GHz have been assigned to mobile networks for the 2G/3G/LTE communications [1]-[3]. Since November 2015, the 3.5 GHz C-band (3.4-3.6 GHz) has been distributed as the future mobile communication by the World Radio Communication Conference 2015 (WRC-15) [4]. As the 5G network offers massive users the ability to access with The associate editor coordinating the review of this manuscript and approving it for publication was Ahmed Mohamed Ahmed Almradi.

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A conveniently amplified DNA AND logic gate platform was designed for the highly sensitive detection of low-abundance DNA fragment inputs based on strand displacement reaction and rolling circle amplification strategy. Compared with others, this system can detect miRNAs in biological samples. The success of this strategy demonstrates the potential of DNA logic gates in disease diagnosis.

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In this letter, a compact ultrawideband polarization diversity MIMO antenna system with dual band‐notched characteristics is proposed. The proposed antenna element consists of a metal ground with a stepped slot etched on it. The stepped slot is fed by a 50‐Ω microstrip line on the top layer. Dual notched bands (5G WLAN and 8G X band) are achieved by etching an open ended slot and a split ring resonator in the ground plane, respectively. Two identical antenna elements are arranged orthogonally and fed perpendicularly to obtain polarization diversity and enhance port isolation. A simple Y‐shaped defected ground structure is etched in the ground plane to suppress mutual coupling between two antennas and improve the impedance matching. Diversity performance in term of envelop correlation coefficient (ECC) and mean effective gain (MEG) are studied. The simulated and measured results show good agreement, which demonstrates that the proposed MIMO antenna system can be a good candidate for UWB MIMO system applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:626–630, 2016