In this paper, a radial line microstrip antenna array (RL-MSAA) for linear polarization is designed. Stacked microstrip antennas (MSAs) with a stub element in the upper parasitic element are arrayed on a radial waveguide as a phase-controllable radiation element. A prototype array with three concentric rows of the stacked MSAs is tested in 12 GHz.

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 ...

In this paper, the results of experimental tests conducted on concrete-filled steel tubular (CFST) columns are presented. There is currently a deficit data available that can be used to evaluate current guidance documents and provide assessment improve their accuracy when considering behaviour CFST filled with high strength concrete. Thus, paper aims increase volume series groups stub subject a...