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In this paper, we present the experimental path loss models for a typical indoor office propagation scenario. Channel measurements have been performed using a wideband channel sounder in the 28 and 38 GHz frequency bands. We derive path loss exponents and shadow fading factors based on the two popular path loss models, i.e., Close-in (CI) free space reference distance model and Floating-intercept...
Highly directive antennas or various beamforming techniques using large antenna arrays are expected to be adopted for overcoming the severe path loss on millimeter-wave bands. This paper investigates the effect of antenna beamwidth on millimeter-wave channel characterization and modeling. The indoor channel measurement campaigns were performed using a wideband channel sounder in the frequency band...
Propagation characteristics of millimeter-wave are being widely studied for utilization of the fifth generation (5G) mobile communication systems. To overcome the severe path loss on the high frequency band, highly directive antennas or beamforming techniques using large array antennas can be used to establish a reliable communication link between a transmitter and a receiver. In this paper, a recently...
The Prins cyclization strategy was successfully applied in the stereoselective synthesis of (−)-blepharocalyxin D (1), a cytotoxic dimeric diarylheptanoid isolated from Alpinia blepharocalyx.
Two novel heptadentate ligands, pentaaza macrocycles with two pendant xpyridyl and phenol groups, were prepared and the crystal structure of the manganese(II) complex of N,N′-bis(2-pyridylmethyl)-pentaaza macrocycle revealed a pentagonal bipyramidal geometry.
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