Softbank Corporation

HoYu Lin

Takafumi Fujii

Akihiro Sato

Naoki Hasegawa

Sachiko Takeuchi

Kenji Hoshino

Yoshichika Ota

Sho Kimura

Hideki Omote

Yuta Nakamoto

Shoma Tanaka

Takeshi Fukusako

Ryuji Kuse

A reflection apparatus which reflects a radio wave includes a first device including first units each including a first base body having a first surface and a second surface provided along an emission direction of the reflected wave, a first element provided on the first surface, and a second element provided on the second surface to be shifted in position from the first element in the emission direction, and a second device including second units each including a second base body having a third surface and a fourth surface provided along the emission direction, a third element provided on the third surface, and a fourth element provided on the fourth surface, and the first device is provided separated from the second device, and a relative positional relationship between the first device and the second device in a direction along the second surface is adjustable.

Reflection apparatus and system

Provided is an aerial-staying type communication relay apparatus that can suppress fluctuations in a directivity pattern due to reflection at an antenna-mounting member to which a service link antenna is mounted, stably fix a footprint of a cell, and as a result, prevent deterioration of communication quality. The communication relay apparatus includes an antenna having plural antenna elements that form a cell for performing a radio communication of a service link to and from the terminal apparatus and an antenna-mounting member to which the antenna is mounted, and a layer of radio wave absorber or a layer of frequency-selective electromagnetic shielding member that selectively shields radio waves having a frequency of the service link, which is provided on an outer surface exposed to an outside of the antenna-mounting member. Phases and amplitudes of signals transmitted and received via each of the plural antenna elements of the antenna may be controlled.

Suppression of reflected wave interference from antenna-mounting plate in service link of haps

Provided is a wireless-power transfer apparatus capable of efficiently supplying a predetermined power for each of plural terminal apparatuses. A wireless-power transfer apparatus comprises a radio processing section for transmitting a signal for wireless power transfer to each of the plural terminal apparatuses via plural beams, by a beamforming for forming the plural beams against the plural terminal apparatuses simultaneously or at staggered times, an information acquisition section for acquiring terminal information including location information of a current location of a terminal apparatus for each of plural terminal apparatuses, and a control section for controlling the beamforming so that a signal for wireless power transfer is received at a predetermined reception power in each of plural terminal apparatuses, based on terminal information of each of plural terminal apparatuses.

Wireless-power transfer apparatus, wireless-power transfer system, method and program

An apparatus, method, and program capable of predicting an attenuation of electromagnetic waves in an upper airspace of a target area in consideration of the influence of long-term weather changes in future are provided. An apparatus for predicting an attenuation of electromagnetic waves between a radio apparatus located above a target area and a terrestrial surface is provided with a data acquisition section for acquiring past weather data in the target area, and an estimation section for estimating a weather corresponding to a future target year in the upper airspace of the target area based on the past weather data, and estimating an attenuation of electromagnetic waves based on an estimation result of the weather.

Apparatus, method and program for predicting attenuation of electromagnetic waves

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Tokyo, Japan

HoYu Lin