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US 6,765,540 B2Granted
Tunable antenna matching circuit
AssigneeKyocera Wireless Corp.
InventorStanley S. Toncich
Life of this patent
Estimating the term…
Abstract
A tunable antenna matching circuit is provided. The matching circuit includes a ferro-electric tunable component. A control signal is applied to the tunable component, changing the component's impedance. This changes the impedance of the matching circuit.
Claims2
A tunable antenna matching circuit comprising:
- a ferro-electric tunable component configured to be coupled to an antenna;
- a matching circuit comprising the ferro-electric tunable component;
- a control line operably coupled to the ferro-electric component;
- a control source electrically coupled to the control line, the control source configured to transmit a control signal on the control line;
- wherein the ferro-electric component, responsive to the control signal, adjusts the impedance of the matching circuit;
- a first inductor coupled, at a first end of the first inductor, to ground and configured to be coupled to an antenna at a second end of the first inductor;
- a second inductor coupled, at a first end of the second inductor, to the second end of the first inductor;
- a first capacitor coupled, at a first end of the first capacitor, to a second end of the second inductor and to ground at a second end of the first capacitor;
- and
- a second capacitor coupled to the second end of the second inductor.
7 more elements
A wireless communication device comprising:
- a battery;
- a transceiver;
- a user interface;
- a housing encasing the battery and the transceiver and adapted to present the user interface external to the housing;
- an antenna matching circuit, configured to be coupled to an antenna and comprising a ferro-electric tunable component;
- a control signal generator for generating a control signal;
- a control line coupled to the control signal generator and to the ferro-electric component;
- a control source electrically coupled to the control line, the control source configured to transmit a control signal on the control line;
- wherein the ferro-electric component, responsive to the control signal, adjusts the impedance of the matching circuit;
- a first inductor coupled, at a first end of the first inductor, to ground and configured to be coupled to an antenna at a second end of the first inductor;
- a second inductor coupled, at a first end of the second inductor, to the second end of the first inductor;
- a first capacitor coupled, at a first end of the first capacitor, to a second end of the second inductor and to ground at a second end of the first capacitor;
- and
- a second capacitor coupled to the second end of the second inductor.
11 more elements
Dependencies are inferred from the claim text.