Advanced Space Communications Research Laboratory

Yuichi Otsu

Hiroyuki Arai

Takashi Miyoshi

Hitoshi Hoshino

A hand-held satellite mobile phone terminal contains an antenna deployment element with a small antenna attached to the tip area of the antenna deployment element The antenna deployment element is usually folded and stored on the rear side surface of the body of the hand-held satellite mobile phone terminal, and is deployed to become vertical to the rear side surface of the hand-held satellite mobile phone terminal body when it is used. The antenna deployment element is attached to the body of the hand-held satellite mobile phone terminal through a rotational axis so that the small antenna attached to the antenna deployment element can be rotated after deployment in order for its plane to become parallel with the ground surface. Also, the hand-held satellite mobile phone terminal is usable both in a satellite communication system and in a terrestrial cellular communication system. For this purpose, the antenna deployment element, batteries and circuits for satellite communication are installed as one package, which can be folded and stored on the rear side surface of the body of the hand-held mobile phone terminal, and which can be removed freely so that it is replaced by another package having the same attachment size as the one package and containing only batteries, when the hand-held mobile phone terminal is used in a terrestrial mobile communication system.

Growing community of inventors

Tokyo, Japan

Yuichi Otsu