Patent ID: 6813481
Filing Date: 2004-11-02
Classification: H01Q

Abstract:
A mobile radio machine, comprising:an antenna including a linear antenna element which is a lower portion of the antenna, and a coil antenna element which is an upper portion of the antenna, said linear and coil antenna elements being separated and electrically isolated from one another by an insulating member, and said antenna being rotated on a lowest position thereof to take a standing-up position so that said linear and coil antenna elements are exposed to outside of a main body, and to take a laying-down-position so that said coil antenna element is only exposed to outside of said main body, while said linear antenna element is restored in said main body; a first feeding terminal for making a contact with said linear antenna element when said antenna is in said standing-up position; a second feeding terminal for making a contact with said coil antenna element when said antenna is in said laying-down position; a first impedance matching circuit connected via said first feeding terminal to said linear antenna element; a second impedance matching circuit connected via said second feeding terminal to said coil antenna element; and a switching circuit for connecting said first impedance matching circuit to a radio circuit, when said antenna takes said standing-up position, and connecting said second impedance matching circuit to said radio circuit, when said antenna takes said laying-down position.