Tunable matching circuit
First Claim
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1. A communication device comprising:
- a capacitive element and an inductive element arranged as a matching circuit, the matching circuit having an impedance;
a ferro-electric material positioned to adjust a value that is a member of the group consisting of a capacitance value of the capacitive element and an inductive element value of the inductor;
a control line operably connected to the ferro-electric material; and
a control source electrically connected to the control line, the control source configured to transmit a control signal on the control line;
wherein the ferro-electric material, responsive to the control signal, adjusts the value to change the impedance of the matching circuit.
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Abstract
The present invention provides for low loss tunable matching circuits at rf frequencies. Ferro-electric materials are used to produce low loss tunable capacitors and inductors for use in matching circuits.
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Citations
23 Claims
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1. A communication device comprising:
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a capacitive element and an inductive element arranged as a matching circuit, the matching circuit having an impedance; a ferro-electric material positioned to adjust a value that is a member of the group consisting of a capacitance value of the capacitive element and an inductive element value of the inductor; a control line operably connected to the ferro-electric material; and a control source electrically connected to the control line, the control source configured to transmit a control signal on the control line; wherein the ferro-electric material, responsive to the control signal, adjusts the value to change the impedance of the matching circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A tunable matching circuit comprising:
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a capacitive element and an inductive element arranged as a matching circuit, the matching circuit having an input conductor and an output conductor and the matching circuit having an impedance; a ferro-electric material positioned to adjust at least one of a capacitance of the capacitive element and an inductance of the inductive element, responsive to a changing dielectric constant, responsive to an electric field condition of the ferro-electric material; and a bias pad connected to the ferro-electric material. - View Dependent Claims (21, 22, 23)
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Specification