Communication device
View Patent ↗A communication device comprises a plurality of antennas, a sensing unit, a plurality of radio frequency circuits, and a sensing module. The sensing unit is electrically connected to the ground through at least one grounding capacitor, and the sensing unit is further configured to isolate and be coupled to each antenna. Each the radio frequency circuit is electrically connected to the corresponding each antenna. The sensing module is electrically connected to the sensing unit through an inductor, wherein the sensing module is used to sense the distance between the sensing unit and an external object by the sensing unit, and the sensing module generates a distance signal according to the distance.
1. A communication device, comprising:
a plurality of antennas;
a sensing unit electrically connected to a ground through at least one grounding capacitor that is directly connected to the ground, the sensing unit being configured to isolate and couple to each of the plurality of antennas;
a plurality of radio frequency circuits, wherein each of the plurality of radio frequency circuits is electrically connected to a corresponding of each of the plurality of antennas; and
a sensing module electrically connected to the sensing unit through an inductor, wherein the sensing module is used to sense a distance between the sensing unit and an external object, and wherein the sensing module generates a distance signal according to the distance.
2. The communication device of claim 1 , wherein each of the plurality of antennas is a planar inverted-F (PIFA) antenna.
3. The communication device of claim 2 , wherein the PIFA antenna is electrically connected to the ground through a capacitor in series.
4. The communication device of claim 1 , wherein the sensing unit comprises:
a first portion coupled to the plurality of antennas; and
at least one second portion electrically connected to the first portion, and the at least one second portion being used to isolate and be coupled to the plurality of antennas.
5. The communication device of claim 4 , wherein each of the at least one second portion is electrically connected to the ground through a corresponding of the at least one grounding capacitor.
6. The communication device of claim 4 , wherein the at least one second portion is disposed equidistant between the plurality of antennas.
7. The communication device of claim 1 , further comprising a control module electrically connected with the sensing module and the plurality of radio frequency circuits, wherein the control module receives the distance signal and sends a control signal to control the plurality of radio frequency circuits.
8. The communication device of claim 7 , wherein the control module is used to judge a distance between the sensing unit and the external object by the distance signal, and the control module sends a power control signal to the plurality of radio frequency circuits to reduce an output power of a radio frequency signal when the distance is less than a threshold.
9. The communication device of claim 1 , wherein each of the plurality of radio frequency circuits is electrically connected to a corresponding of the plurality of antennas through a connection capacitor.
10. The communication device of claim 1 , wherein each of the plurality of antennas is a monopole antenna.