Patent ID: 11956640
Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A communication device, comprising:
a wireless communication circuit configured to control wireless communication with a portable device in conformity with a specific communication standard;
a capacitive sensor circuit configured to detect proximity of an object on a basis of a change in capacitance;
an antenna configured to be used for both transmitting/receiving a wireless signal conforming to the specific communication standard and detecting the capacitance;
a high-pass filter disposed between the wireless communication circuit and the antenna; and
a low-pass filter disposed between the capacitive sensor circuit and the antenna,
wherein the communication device is configured to be disposed in a gripping portion to be gripped by a user carrying the portable device, and
the capacitive sensor circuit detects the proximity of the object after authenticity of the portable device is confirmed.