Front-End Circuit for Improved Antenna Performance
AssigneeEpcos AG
InventorsPasi Tikka, Jarmo Valtonen
Life of this patent
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Abstract
A front-end circuit includes a signal path and a first antenna port. A first antenna switch is electrically connected to the first antenna port. A second antenna port is electrically connectable or connected to the signal path. An antenna termination circuit is electrically connected to the first antenna switch. The antenna termination includes an impedance element. The first antenna switch electrically connects the first antenna port to the antenna termination circuit when the signal path is electrically connected to the second antenna port.
Claims19
A front-end circuit comprising:
- a signal path;
- a first antenna port;
- a first antenna switch that is electrically connected to the first antenna port;
- a second antenna port that is electrically connectable or connected to the signal path;
- an antenna termination circuit that is electrically connected to the first antenna switch, wherein the antenna termination circuit comprises an impedance element selected from the group consisting of a resistance element, a capacitive element and an inductive element;
- and
- wherein the first antenna switch electrically connects the first antenna port to the antenna termination circuit when the signal path is electrically connected to the second antenna port.
A method for driving a front-end circuit, the method comprising:
- identifying an active antenna port of the front-end circuit;
- identifying an inactive antenna port of the front-end circuit;
- consulting a mode table regarding antenna performance;
- and
- terminating the inactive antenna port open, short or individual according to the mode table by selecting and setting a switching state an antenna switch associated with the inactive antenna port.
Dependencies are inferred from the claim text.