H
Hiroki Ito
Researcher at Sony Broadcast & Professional Research Laboratories
Publications - 15
Citations - 380
Hiroki Ito is an academic researcher from Sony Broadcast & Professional Research Laboratories. The author has contributed to research in topics: Antenna (radio) & Coaxial antenna. The author has an hindex of 10, co-authored 15 publications receiving 380 citations.
Papers
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Patent
Antenna device and portable radio set
Hiroki Ito,Masatoshi Sawamura +1 more
TL;DR: In this article, an antenna in which first and second antenna elements are selected by a switching apparatus so that the first and the second antennas elements are connected to an unbalanced transmission line via a balancing-unbalancing transmission line or only the first antenna element is connected to the unbalanced line.
Patent
Antenna apparatus and portable communication apparatus
Hiroki Ito,Katsumi Okayama +1 more
TL;DR: In this article, two inverted-F antennas having the same characteristics are supplied with power with phase difference of 180 degrees respectively, and only radio wave of polarized wave in a predetermined direction can be radiated and deterioration in antenna characteristics due to leak currents can be prevented.
Patent
Antenna apparatus and portable radio set
TL;DR: An antenna that functions as an approximately balanced antenna that is structurally asymmetric but electrically symmetric includes a first antenna element that is extendable and retractable, a second fixed antenna element, an unbalanced transmission line feeding the first and second antenna elements, and a balanced-unbalanced convertor as mentioned in this paper.
Patent
Antenna device and portable radio communication device
TL;DR: In this paper, a portable radio communication device with a conductive plate for use in reducing the amount of the electromagnetic waves to be absorbed into a human body can be reduced in size.
Patent
Antenna for two frequency bands
TL;DR: In this article, an antenna which operates in two frequency bandes even when its sliding antenna section (30) is housed in or pulled out from an enclosure is described, and the antenna cover is used to hold the antenna on the extension of the axis of the antenna.