Impedance Adjustment Circuit for Adjusting Planar Antennas
AssigneeEpcos AG
InventorEdgar Schmidhammer
Life of this patent
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Abstract
An impedance matching circuit for matching planar antennas includes a signal path with a signal path input and a signal path output. A first capacitive element with variable capacitance is connected between the signal path input and signal path output. A second capacitive element with variable capacitance is connected between the signal path and ground. A first inductive element is connected between the signal path input and ground. A second inductive element is connected between the signal path output and ground. An antenna line with an impedance between 30 and 60 ohm is connected to the signal path output.
Claims20
An impedance matching circuit for matching planar antennas, the circuit comprising:
- a signal path with a signal path input and a signal path output;
- a first capacitive element with variable capacitance connected between the signal path input and signal path output;
- a second capacitive element with variable capacitance connected between the signal path and ground;
- a first inductive element connected between the signal path input and ground, a second inductive element connected between the signal path output and ground;
- and
- an antenna line with an impedance between 30 and 60 ohm connected to the signal path output.
Dependencies are inferred from the claim text.