Electronic device including antenna module to output signal based on specific absorption rate in communication system, and method of operating same
An electronic device includes: a sensor module; an antenna module; and a processor electrically connected to the sensor module and the antenna module. The processor is configured to: identify a frequency band, identify a spaced distance from the antenna module to a user measured by the sensor module, and determine a power value of a transmission signal for being transmitted through the frequency band based on the frequency band and the spaced distance, and the antenna module is configured to output the transmission signal through the frequency band by using the antenna module.
1 . An electronic device comprising:
a sensor module;
an antenna module; and
a processor electrically connected to the sensor module and the antenna module,
wherein the processor is configured to:
identify a first frequency band,
determine, based on an electric field value of a transmission signal in the first frequency band being weaker than a predetermined electric field value, that an optimization for an output of the transmission signal is necessary,
determine whether a maximum output for the transmission signal in the first frequency band is limited, the determining comprising:
identifying a spaced distance from the antenna module to a user measured by the sensor module, and
determining whether the spaced distance is shorter than a first predetermined spaced distance in which a specific absorption rate of a transmission signal for transmission through the first frequency band is equal to a predetermined tolerance value, and
responsive to the maximum output being limited in the first frequency band, determine whether another frequency band exists in which the maximum output for the transmission signal is allowed, thereby preventing a power backoff, the determining comprising:
in case the spaced distance is shorter than the first predetermined spaced distance, determining whether a second frequency band, in which the spaced distance is equal to or greater than a second predetermined spaced distance in which a specific absorption rate of a transmission signal for transmission through the second frequency band is equal to the predetermined tolerance value, exists,
wherein the antenna module is configured to change a frequency band, in which a transmission signal is to be output, from the first frequency band to the second frequency band.
2 . The electronic device of claim 1 , wherein the processor is configured to:
in case the second frequency band does not exist, transmit the transmission signal through the first frequency band with a limited power value.
3 . The electronic device of claim 1 , wherein the first frequency band is a radio frequency band at a higher frequency than the second frequency band.
4 . The electronic device of claim 3 , wherein the first frequency band is equal to or higher than 1.5 GHz and the second frequency band is equal to or lower than 1 GHz.
5 . The electronic device of claim 1 , wherein the first predetermined spaced distance is 20 mm, and the second predetermined spaced distance is 10 mm.
6 . The electronic device of claim 1 , further comprising a communication module electrically connected to the antenna module,
wherein the communication module is configured to generate the transmission signal that is able to be transmitted with a maximum output in the second frequency band.
7 . A method of operating an electronic device comprising:
identifying a first frequency band by using a processor;
determining, based on an electric field value of a transmission signal in the first frequency band being weaker than a predetermined electric field value, that an optimization for an output of the transmission signal is necessary;
determining whether a maximum output for the transmission signal in the first frequency band is limited, the determining comprising:
measuring a spaced distance from an antenna module to a user by using a sensor module; and
determining whether the spaced distance is shorter than a first predetermined spaced distance in which a specific absorption rate of a transmission signal for transmission through the first frequency band is equal to a predetermined tolerance value;
responsive to the maximum output being limited in the first frequency band, determining whether another frequency band exists in which the maximum output for the transmission signal is allowed, thereby preventing a power backoff, the determining comprising:
in case the spaced distance is shorter than the first predetermined spaced distance, determining whether a second frequency band, in which the spaced distance is equal to or greater than a second predetermined spaced distance in which a specific absorption rate of a transmission signal for transmission through the second frequency band is equal to the predetermined tolerance value, exists; and
changing a frequency band, in which a transmission signal is to be output, from the first frequency band to the second frequency band by using the antenna module.
8 . The method of claim 7 , wherein the method comprises:
in case the second frequency band does not exist, transmitting the transmission signal through the first frequency band with a limited power value.
9 . The method of claim 7 , wherein the first frequency band is a radio frequency band at a higher frequency than the second frequency band.
10 . The method of claim 9 , wherein the first frequency band is equal to or higher than 1.5 GHz and the second frequency band is equal to or lower than 1 GHz.