Wireless communication device and communication control method
AssigneeOmron Automotive Electronics Co., Ltd.
InventorTadao Nishiguchi
Life of this patent
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Abstract
A wireless communication device for a vehicle conducts wireless communication with a vehicle portable key through an antenna including a resonant circuit. The wireless communication device has a transmitting circuit that transmits a signal from the antenna, and a control circuit that supplies an inversion carrier wave in which a phase of a carrier wave is inverted to the transmitting circuit for a predetermined time after a modulated signal in which the carrier wave is modulated by transmission data is transmitted from the antenna.
Claims13
A wireless communication device for a vehicle that conducts wireless communication with a vehicle portable key through an antenna including a resonant circuit, the wireless communication device comprising:
- a transmitting circuit that transmits a signal from the antenna;
- and
- a control circuit that supplies an inversion carrier wave in which a phase of a carrier wave is inverted to the transmitting circuit for a predetermined time after a modulated signal in which the carrier wave is modulated by transmission data is transmitted from the antenna.
A wireless communication device for a vehicle that conducts wireless communication with a vehicle portable key through a first antenna including a first resonant circuit and a second antenna including a second resonant circuit, the wireless communication device comprising:
- a transmitting circuit that transmits a signal from the first antenna and the second antenna;
- and
- a control circuit that supplies an inversion carrier wave in which a phase of a carrier wave is inverted to the transmitting circuit for a predetermined time after a modulated signal in which the carrier wave is modulated by transmission data is transmitted from the first antenna and the second antenna,
- wherein the wireless communication device transmits the modulated signal at different times through the first antenna and the second antenna, and
- wherein the control circuit supplies the inversion carrier wave to the transmitting circuit for the first antenna for a predetermined time before the modulated signal is transmitted through the second antenna after the modulated signal is transmitted through the first antenna.
A communication control method for a wireless communication device for a vehicle, comprising:
- transmitting a signal via a transmitting circuit from an antenna including a resonant circuit;
- conducting wireless communication with a vehicle portable key through the antenna;
- and
- supplying an inversion carrier wave in which a phase of a carrier wave is inverted to the transmitting circuit for a predetermined time after a modulated signal in which the carrier wave is modulated by transmission data is transmitted from the antenna.
Dependencies are inferred from the claim text.