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Recently, the challenges of the utilization of higher frequency bands for cellular systems have been attracting attention. In these high frequency bands, besides the higher propagation losses, the propagation channel tends to suffer more severe shadowing by pedestrians in the environments. In this paper, we carried out measurements in the 26GHz band in an indoor quasi-static environment for figuring...
Wireless power transmission is being investigated as a means to operate tiny medical devices such as the capsular endoscope, which is able to exist for a long period during diagnostic procedures within the body. In this paper, we examine the wireless power transmission to a capsular endoscope by microwaves to show its usability for medical applications. A modified helical antenna inside the endoscope...
This paper provided a measurement campaign of simple antenna system mounted on a vehicle by utilising a Japanese geostationary test satellite called Engineering Test Satellite VIII (ETS-VIII). We developed an antenna system that was compact, light weight, and promising in low cost production. The antenna system was built by a 16-cm patch array antenna, which had simple satellite-tracking method that...
On the air (OTA) measurement has attracted attention as a method for evaluating MIMO user equipment (UE), and represents a promising candidate for the LTE and IMT-advanced systems. Moreover, we have to simulate spatiotemporal dynamic channel properties in the OTA measurement systems to evaluate MIMO systems with dynamic radio resource assignment. In this paper, we report the basic studies of the spatio-temporal...
Small implanted devices have been investigated with great interest for wireless medical applications due to the promise of different clinical usages in order to promote patient's independence. In these implanted device systems, an antenna plays an important role as a part of transmitting and receiving power. There are several issues to consider while designing an in-body antenna, including power consumption,...
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