Patent ID: 6985760

Claim:
A foldable portable radio terminal, comprising: a portable radio terminal body including a first body and a second body connected for pivotal folding movement to each other; an antenna mounted on said first body; an antenna matching circuit for determining an antenna characteristic of said antenna; a matching characteristic changeover circuit for changing over the characteristic of said antenna matching circuit so that the antenna characteristic when said portable radio terminal body is folded and the antenna characteristic when said portable radio terminal body is not folded are equal to each other; a folded state detection circuit for detecting whether or not said portable radio terminal body is folded and issuing a detection signal representative of a result of the detection, wherein said matching characteristic changeover circuit changes over the characteristic of said antenna matching circuit in response to the detection signal of said folded state detection circuit; said antenna matching circuit determines the antenna characteristic in a state wherein said portable radio terminal body is folded, said matching characteristic changeover circuit changes over the characteristic of said antenna matching circuit so that the antenna characteristic of said antenna matching circuit when said portable radio terminal body is not folded may be equal to the antenna characteristic in the state wherein said portable radio terminal body is folded, and said matching characteristic changeover circuit is connected to said antenna and supplies current so as to cancel high frequency current distributed in said portable radio terminal body in order to eliminate variation of the high frequency current between when said portable radio terminal body is folded and when said portable radio terminal body is not folded.