Patent ID: 8330667
Filing Date: 2012-12-11
Classification: H03F,H03H,H04B

Abstract:
1. A portable wireless terminal comprising: an antenna interface module having a first port for connection to a RF output or input stage and a second port; a threshold detector including a reactance threshold detector coupled between the second port and an antenna terminal for connection to an antenna; the antenna interface module including first and second switches; a first matching circuit including an inductive reactance coupled between the first port and a first pole of the first switch; and a second matching circuit including a capacitive reactance coupled between the first port and a first pole of the second switch, second poles of the first and second switches being coupled to the second port, the reactance threshold detector providing an output for changing the state of the first switch from a first condition to a second condition and the state of the second switch from a second condition to a first condition, or vice versa, in response to the reactance threshold detector traversing a predetermined threshold value.