Antenna module supporting of sensing distance and electronic device including the same
Disclosed is an electronic device including an antenna module including a first antenna element and a second antenna element, and a processor operatively connected to the antenna module. The processor may be configured to transmit a first signal through the first antenna element, to receive a second signal including a signal obtained as the first signal is reflected by a target object, through the second antenna element, to calculate a distance from the antenna module to the target object based on a phase of the second signal, and to reduce a power level of the antenna module when the distance to the target object is smaller than a reference distance. In addition, various embodiments as understood from the specification are also possible.
1. An electronic device comprising:
an antenna including a first antenna element and a second antenna element; and
a processor operatively connected to the antenna, wherein the processor is configured to:
transmit a first signal through the first antenna element;
receive, through the second antenna element, a second signal including a signal obtained as the first signal, wherein the second signal is reflected by a target object;
calculate a distance from the antenna to the target object based on a phase of the second signal; and
when the distance to the target object is smaller than a reference distance, reduce a power level of the antenna,
wherein the second signal includes a coupling signal by the first signal and a reflection signal by the target object, and
wherein the processor is further configured to:
remove the coupling signal from the second signal to obtain the reflection signal, and
calculate the distance to the target object based on a phase of the reflection signal.
2. The electronic device of claim 1 , wherein the first antenna element and the second antenna element are configured to include a first polarization and a second polarization, and
wherein the processor is further configured to:
transmit, through the antenna, the first signal using the first polarization of the first antenna element; and
receive, through the antenna, the second signal using the second polarization of the second antenna element.
3. The electronic device of claim 1 , wherein the processor is further configured to:
obtain a magnitude and a phase of the coupling signal in a state where the target object is not present.
4. The electronic device of claim 3 , wherein the processor is further configured to:
convert the second signal into a baseband signal based on the phase of the coupling signal;
remove the magnitude of the coupling signal from the baseband signal; and
adjust a phase offset occurring in a process of converting the second signal into the baseband signal to obtain the reflection signal.
5. The electronic device of claim 1 , wherein the processor is further configured to:
transmit a third signal through the first antenna element;
receive a fourth signal through the second antenna element;
remove a coupling signal obtained in advance from the second signal to obtain a first reflection signal; and
remove the coupling signal from the fourth signal to obtain a second reflection signal.
6. The electronic device of claim 5 , wherein the processor is further configured to:
calculate the distance to the target object based on a phase difference between the first reflection signal and the second reflection signal.
7. The electronic device of claim 1 , wherein the processor is further configured to:
measure a first coupling signal in a state where the target object is not present;
measure a second coupling signal in a state where the target object is present; and
when a magnitude difference between the first coupling signal and the second coupling signal is greater than a reference magnitude, determine a proximity state where the distance to the target object is smaller than a specified distance.
8. The electronic device of claim 1 , wherein the antenna performs an uplink signal transmission or a downlink signal transmission for a data transmission through a plurality of slots including a flexible slot, and
wherein the processor is further configured to:
transmit, through the antenna, the first signal through the flexible slot in which the uplink signal transmission or the downlink signal transmission for the data transmission is not performed.
9. The electronic device of claim 1 , wherein the processor is further configured to:
when the target object blocks a partial area of a transmission beam of the antenna, not reduce a power level for a reception beam of the antenna facing in a direction not blocked by the target object.
10. An electronic device comprising:
an antenna including a first antenna element and a second antenna element; and
a processor operatively connected to the antenna, wherein the processor is configured to:
transmit a first signal through the first antenna element;
receive, through the second antenna element, a second signal including a signal obtained as the first signal, wherein the second signal is reflected by a target object;
when a power level of the second signal is less than a reference power level, perform a radar operation using the first signal;
when a distance, measured by the radar operation, from the antenna to the target object is smaller than a reference distance, determine a phase change of the second signal; and
when the phase change of the second signal is greater than a reference phase change, reduce a power level of the antenna.
11. The electronic device of claim 10 , wherein the first signal includes a pulse signal transmitted based on a specified time interval.
12. The electronic device of claim 10 , wherein the processor is further configured to:
when the power level of the second signal is not less than the reference power level, determine a phase change of the second signal; and
when the phase change of the second signal is greater than the reference phase change, reduce the power level of the antenna.
13. The electronic device of claim 10 , wherein the processor is further configured to:
when the distance to the target object is not less than the reference distance, maintain the power level of the antenna.
14. The electronic device of claim 10 , wherein the processor is further configured to:
when the phase change of the second signal is not greater than the reference phase change, maintain the power level of the antenna.
15. The electronic device of claim 10 , wherein the antenna includes a power detector measuring the power level of the second signal.
16. The electronic device of claim 10 , wherein the antenna includes a high speed switching circuit generating the first signal.
17. The electronic device of claim 16 , wherein the processor is further configured to provide a reference clock to the high speed switching circuit, and
wherein the high speed switching circuit generates the first signal including a frequency greater than the reference clock.
18. The electronic device of claim 10 , wherein the antenna performs an uplink signal transmission or a downlink signal transmission for a data transmission through a plurality of slots including a flexible slot, and
wherein the processor is further configured to:
transmit, through the antenna, the first signal through the flexible slot in which the uplink signal transmission or the downlink signal transmission for the data transmission is not performed.
19. The electronic device of claim 10 , wherein the processor is further configured to:
when the target object blocks a partial area of a transmission beam of the antenna, not reduce a power level for a reception beam of the antenna facing in a direction not blocked by the target object.