US 7,519,174 B2
	Communication terminal with casing conductors for reducing antenna gain degradation
Nobuaki Tanaka, Yokohama (Japan); Kenji Sato, Yokohama (Japan); and Eiji Saito, Yokohama (Japan)
Assigned to Panasonic Corporation, Osaka (Japan)
Appl. No. 10/534,153 PCT Filed Nov. 07, 2003, PCT No. PCT/JP03/14223 § 371(c)(1), (2), (4) Date Jun. 16, 2005, PCT Pub. No. WO2004/042947, PCT Pub. Date May 21, 2004.
Claims priority of application No. 2002-324084 (JP), filed on Nov. 07, 2002.
Prior Publication US 2006/0017625 A1, Jan. 26, 2006
Int. Cl. H04M 1/00 (2006.01); H04M 9/00 (2006.01); H05K 9/00 (2006.01)

U.S. Cl. 379—419  [379/429; 361/816; 455/575.5]

14 Claims

1. A mobile phone including a circuit board having a ground plane, the circuit board connected to an antenna, and the circuit board contained in a casing, the mobile phone, comprising: a first conductive part, formed of a conductor, and provided in the casing so as to be exposed from a rear face of the casing; a second conductive part, formed of a conductor, and provided in the casing so as to be exposed from a bottom face or side face of the casing and a passive element provided between the second conductive part and the ground plane of the circuit board, wherein the second conductive part is electrically connected to the ground plane of the circuit board through the passive element and to the first conductive part.