Antenna circuit, communication device, and communication method
AssigneeSony Corporation
InventorHiroshi BANDO
Life of this patent
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Abstract
An antenna circuit which includes, a resonant circuit which is configured by at least first and second capacitors, and antenna coils; a transmitter-receiver circuit which has a transmission terminal and a reception terminal; and an adjustment circuit which adjusts an impedance between the resonant circuit and the transmitter-receiver circuit, in which a combination of capacitances of the first and second capacitors is set in a predetermined range of a composite capacitance of the first and second capacitors, and a signal from a terminal which is provided between the first and second capacitors is input to the reception terminal.
Claims7
An antenna circuit comprising:
- a resonant circuit which is configured by at least first and second capacitors, and antenna coils;
- a transmitter-receiver circuit which has a transmission terminal and a reception terminal;
- and
- an adjustment circuit which adjusts an impedance between the resonant circuit and the transmitter-receiver circuit,
- wherein a combination of capacitances of the first and second capacitors is set in a predetermined range of a composite capacitance of the first and second capacitors, and
- wherein a signal from a terminal which is provided between the first and second capacitors is input to the reception terminal.
A communication device comprising:
- an antenna circuit which includes
- a transmitter-receiver circuit having a transmission terminal and a reception terminal;
- a resonant circuit which is configured by at least first and second capacitors, and antenna coils;
- and
- an adjustment circuit which adjusts an impedance between the resonant circuit and the transmitter-receiver circuit,
- wherein a combination of capacitances of the first and second capacitors is set in a predetermined range of a composite capacitance of the first and second capacitors, and
- wherein a signal from a terminal which is provided between the first and second capacitors is input to the reception terminal.
A communication method using an antenna circuit which includes
- a transmitter-receiver circuit including a transmission terminal and a reception terminal;
- a resonant circuit which is configured by at least first and second capacitors, and antenna coils;
- and
- an adjustment circuit which adjusts an impedance between the resonant circuit and the transmitter-receiver circuit,
- the method comprising:
- setting a combination of capacitances of a first and second capacitors in a predetermined range of a composite capacitance of the first and second capacitors;
- and
- inputting a signal from a terminal which is provided between the first and second capacitors to the reception terminal.
Dependencies are inferred from the claim text.