Patent ID: 6456248
Filing Date: 2002-09-24
Classification: H01Q

Abstract:
An antenna device functioning as an antenna by supplying electric power to an antenna element from a power supply point for reducing an amount of electromagnetic waves absorbed by a user, said device comprising:high-frequency current restricting means including: a first conductive planar plate having a first short-circuit portion with one end electrically short-circuited to a shield case connected to high-frequency currents from said power supply point and a first open end portion with an other end being electrically opened and positioned outside of said shield case to bring an input impedance close to infinity at first radio communication frequencies; and a second conductive planar plate having a second short-circuit portion with one end electrically short-circuited to said shield case and a second open end portion with the other end being electrically opened and positioned outside of said shield case to bring an input impedance close to infinity at second radio communication frequencies, wherein said first conductive planar plate and said second conductive planar plate are composed as one unit.