Capacitive sensor device and radio transceiver with a capacitive sensor device and a method for adjusting a transmission power of a handheld radio transceiver

摘要

A capacitive sensor device for a handheld radio transceiver for estimating a specific absorption rate (SAR) can be coupled with at least one first electrode, wherein during the operation of the handheld radio transceiver the first electrode is at the same time a sensor electrode of the capacitive sensor device and an antenna of the handheld radio transceiver. Moreover a handheld radio transceiver with such a capacitive sensor device can be provided. Moreover, a method can be provided for adjusting a transmission power of a handheld radio transceiver, wherein an approach of an object to the handheld radio transceiver is detected and wherein depending on the detected approach the transmission power of the handheld radio transceiver is increased or reduced.

主权项

1. Capacitive sensor device for a handheld radio transceiver connected with an antenna element, for estimating a specific absorption rate (SAR) of the handheld radio transceiver, wherein the sensor device is coupled with the antenna element, and wherein during the operation of the handheld radio transceiver the antenna element is at the same time a sensor electrode of the capacitive sensor device and an antenna of the handheld radio transceiver wherein the sensor device further comprises a second electrode, which can be brought into a capacitive coupling with them antenna element, wherein one of the antenna element and the second electrode is operable as transmitting electrode and the respective other one as receiver electrode, and wherein the transmitting electrode can be fed with an electric alternating signal.