In this paper, a wideband eight-element multiple-input multiple-output (MIMO) antenna array for 5G smartphone applications is presented. Each composed of dual-arm tortuous monopole radiating element with double-stub tuner and an open slot on the ground plane. Tuning stub microstrip lines are utilized to improve impedance matching. The operating bandwidth single from 3200 6000 MHz three resonant...

The paper provides an experimental comparison of four types of ultra-wideband coplanar-fed planar monopole antennas. Parameters of the open stub completed by an L-shaped monopole and the cross monopole were adopted from the literature. The forked monopole and the coplanar monopole were fabricated and measured. Monopoles were compared from the viewpoint of the impedance bandwidth, gain, directiv...

The concurrent action of the sucrase and isomaltase active sites of the hybrid sucrase-isomaltase from rat intestine on an a-limit dextrin was studied by use of 63 maltotriosylmaltotriose isolated from controlled action of pullulanase on pullulan. Hydrolysis of the a-dextrin hexasaccharide occurred by sequential removal of a glucose residue from its nonreducing end. The initial pentasaccharide ...

1. Introduction Leaky-wave antennas based on an open-waveguide structure can become a candidate of millimeter-wave antennas. Since such a structure is already open, leakage is produced by introducing not a physical cut, but asymmetry of the structure. As a result, it supports a leaky mode (instead of a bound mode) and therefore radiates all along its length, possess flexibility in beamwidth and...

Developer testing (also called unit testing) can help ensure the development of high-quality cloud applications. However, unit testing normally can’t take into account all possible inputs because the input space is too large or even infinite. So, developers need criteria to decide which test inputs to use and when to stop testing. Effective use of criteria such as structural-code coverage can h...