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:
Nov. 20, 2012
Filed:
Apr. 10, 2006
Takuya Kojima, Saitama, JP;
Shinya Nakamura, Saitama, JP;
Takuya Kojima, Saitama, JP;
Shinya Nakamura, Saitama, JP;
NEC Corporation, Tokyo, JP;
Abstract
A folding mobile phone is provided that improves the antenna characteristics of both of a main antenna and a sub-antenna. The folding mobile phone comprises at least an upper housing, a lower housing, a hinge unit, a main antennalocated in the vicinity of the hinge unitof the lower housing, a sub-antennalocated at the lower end of the lower housing, and a control unit for selecting an antenna to be used, the folding mobile phone comprising: an upper-and-lower-connections switching circuitfor connecting to a lower circuit board; and an upper-and-lower-boards connecting meansfor connecting an upper circuit boardwith the upper-and-lower-connections switching circuit, wherein, at the upper-and-lower-connections switching circuit, an electrical connection state between the upper circuit boardand the lower circuit boardis switched by turning the PIN diode on and off based on the antenna selection signal from the control unit. This provides an appropriate connection state for the selected antenna and thus improves the antenna characteristics of both antennas.