The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Jul. 19, 2004
Shinichi Uotsu, Hitachinaka, JP;
Masanobu Kumekawa, Higashiyamato, JP;
Yutaka Chiba, Higashiyamato, JP;
Shinichi Uotsu, Hitachinaka, JP;
Masanobu Kumekawa, Higashiyamato, JP;
Yutaka Chiba, Higashiyamato, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a cell phone, no consideration is given to a switch unit when a reception circuit for space diversity is added, and consequently an antenna can be optimally connected to the reception circuit for space diversity. The cell phone comprises a first antenna for radio communication, a transmission-reception circuit to exchange signals with a base station through the first antenna, and a GPS reception circuit to receive signals from the GPS satellite through the first antenna. The reception circuit receives a signal from the base station, a second antenna different from the first antenna is provided, and the switch unit changes over connections between the first antenna and the second antenna, and the transmission-reception circuit, the GPS reception circuit and the reception circuit according to operation modes.