Apparatus and method for determining reflection coefficient of antenna

1. An electronic device comprising:

an antenna;

a communication module including a transceiver; and

a control circuit,

wherein the control circuit is configured to:

radiate a first signal generated from the transceiver through the antenna;

obtain at least part of a second signal obtained by combining a forward signal delivered from the communication module to the antenna and a reverse signal reflected from the antenna; and

determine a reflection coefficient for the antenna based on at least part of the first signal and at least part of the second signal.

2. The electronic device of claim 1 , further comprising:

a memory,

wherein the control circuit is configured to:

determine the reflection coefficient based at least on a look-up table indicating a ratio between the first signal and the second signal, which are stored in the memory.

3. The electronic device of claim 2 , further comprising:

a passive element between the communication module and the antenna,

wherein the control circuit is configured to:

obtain the at least part of the second signal through the passive element.

4. The electronic device of claim 2 , wherein the communication module further includes a first transmission/reception module corresponding to a first frequency band and a second transmission/reception module corresponding to a second frequency band,

further comprising:

a switch between the communication module and the antenna,

wherein the control circuit is configured to:

obtain the at least part of the second signal through a port, which is not connected to the first transmission/reception module and the second transmission/reception module, from among a plurality of ports included in the switch.

5. The electronic device of claim 2 , further comprising:

a first line interposed between the communication module and the antenna and a second line disposed separately from the first line,

wherein the control circuit is configured to:

obtain the at least part of the second signal through the second line.

6. The electronic device of claim 5 , wherein the communication module includes a printed circuit board (PCB), and

wherein the second line is disposed on the same layer as the first line, on a layer over the first line, or on a layer under the first line, on the PCB.

7. The electronic device of claim 1 , further comprising:

a tuner between the communication module and the antenna,

wherein the control circuit is configured to:

correct impedance for the antenna based on the determined reflection coefficient through the tuner.

8. The electronic device of claim 1 , wherein the transceiver includes a radio frequency integrated circuit (RFIC).

9. A method of an electronic device, the method comprising:

radiating a first signal generated from a transceiver, through an antenna;

obtaining at least part of a second signal obtained by combining a forward signal delivered to the antenna and a reverse signal reflected from the antenna; and

determining a reflection coefficient for the antenna based on at least part of the first signal and at least part of the second signal.

10. The method of claim 9 , wherein the determining of the reflection coefficient includes:

determining the reflection coefficient based on a look-up table indicating a ratio between the first signal and the second signal.

11. The method of claim 10 , wherein the obtaining of the at least part of the second signal includes:

obtaining the at least part of the second signal through a passive element interposed between a communication module including the transceiver and the antenna.

12. The method of claim 10 , wherein the obtaining of the at least part of the second signal includes:

obtaining the at least part of the second signal through a port of a switch interposed between a communication module including the transceiver and the antenna.

13. The method of claim 10 , wherein the obtaining of the at least part of the second signal includes:

obtaining the at least part of the second signal through a first line interposed between a communication module including the transceiver and the antenna and a second line disposed separately from the first line.

14. The method of claim 13 , wherein the second line is disposed on the same layer as the first line, on a layer over the first line, or on a layer under the first line.

15. The method of claim 9 , further comprising:

correcting impedance for the antenna based on the determined reflection coefficient.