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Warehouse automation systems that use robots to save human labor are becoming increasingly common. In a previous study, a picking system using a multi-joint type robot was developed. However, articulated robots are not ideal in warehouse scenarios, since inter-shelf space can limit their freedom of motion. Although the use of linear motion-type robots has been suggested as a solution, their drawback...
This paper presents results from an outdoor radio propagation experiment at 2.35 GHz using a channel sounder and a spherical horn antenna array. The propagation test was performed in Aalborg city in Denmark. Comparing the ray-tracing results and the results obtained with the proposed method on the measured data shows a good match in both the spatial and time domains.
Recently, Long Term Evolution (LTE) cellular mobile communication has been started in a number of countries. The LTE system employs a Multi Input Multi Output (MIMO) antenna array for achieving high-data-rate wireless communication. The radio propagation characteristics and antenna array configuration have a great impact on the MIMO performance [1]. Thus, MIMO propagation tests have been carried out...
This paper presents a radio frequency (RF) controlled spatial fading emulator for the evaluation of a handset MIMO antenna. The RF-controlled fading emulator can control RF signals directly in the spatial domain to produce an accurate radio propagation channel model, which includes the uniform and non-uniform angular power spectra (APS) in the horizontal plane. Fading correlation and MIMO channel...
We have studied the temperature dependence of crystalline Ge film growth on quartz, Si(100), Si(110) and Si(111) substrates from VHF-inductively-coupled plasma (ICP) of GeH 4 +H 2 . The ICP was generated by supplying 60 MHz power to an external single-turn antenna which was placed on a quartz plate window of a stainless steel reactor and parallel to the substrate. We have found that...
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