Radio-Frequency Device and Wireless Communication Device

摘要

A radio-frequency device for a wireless communication device includes an antenna, a capacitive sensing unit, a connecting unit comprising a first terminal electrically connected to a radiating element of the antenna, a second terminal and a third terminal, conducting to each other, a direct-current (DC) blocking element for cutting off a DC signal route between the second terminal of the connecting unit and a signal feed-in unit of the antenna, a sensing auxiliary unit including a high-frequency blocking element for blocking a high-frequency signal route between the third terminal of the connecting unit and the capacitive sensing unit, and at least a capacitor connected to the high-frequency blocking element in series and electrically connected between the third terminal of the connecting unit and the capacitive sensing unit, for decreasing an equivalent capacitance from the connecting unit to the radiating element.

主权项

1. A radio-frequency (RF) device for a wireless communication device, the RF device comprising:
an antenna, comprising:
a radiating element; anda signal feed-in unit, for transmitting and receiving an RF signal; a capacitive sensing unit, for sensing an environment capacitance within a specific range; a connecting unit, comprising a first terminal, a second terminal and a third terminal being mutually conductive, the first terminal electrically connected to the radiating element of the antenna; a direct-current (DC) blocking element, electrically connected between the second terminal of the connecting unit and the signal feed-in unit, for cutting off a DC signal route between the second terminal of the connecting unit and the signal feed-in unit; and a sensing auxiliary unit, electrically connected between the third terminal of the connecting unit and the capacitive sensing unit, comprising:
a high-frequency blocking element, for blocking a high-frequency signal route between the third terminal of the connecting unit and the capacitive sensing unit, to avoid the RF signal interfering the capacitive sensing unit; andat least a capacitor, connected to the high-frequency blocking element in series and electrically connected between the third terminal of the connecting unit and the capacitive sensing unit, for decreasing an equivalent capacitance from the connecting unit to the radiating element; wherein the signal feed-in unit is coupled to the radiating element via the DC blocking element and the connecting unit, for transmitting and receiving the RF signal via the radiating element; wherein the capacitive sensing unit is coupled to the radiating element via the high-frequency blocking element and the connecting unit, for sensing the environment capacitance within the specific range via the radiating element.