Electronic apparatus
An electronic apparatus capable of reducing SAR and, simultaneously, suppressing degradation of antenna efficiency is provided. To that end, an electronic apparatus includes a first temple to be positioned on one side of the user's head when the electronic apparatus is worn on the user's head, a second temple to be positioned on the other side of the user's head when the electronic apparatus is worn on the user's head, an first antenna formed in the first temple, an second antenna formed in the second temple, and a transceiver circuit for supplying power to the first antenna and the second antenna.
1. An electronic apparatus to be worn on the user's head for use, the electronic apparatus comprising:
a first temple to be positioned on one side of the user's head when the electronic apparatus is worn on the user's head;
a second temple to be positioned on the other side of the user's head when the electronic apparatus is worn on the user's head;
a first antenna formed in the first temple;
a second antenna formed in the second temple; and
a bridge connecting the first temple and the second temple, the bridge having a transceiver circuit comprising:
a power distributor;
a first matching circuit coupling the power distributor to the first antenna;
a second matching circuit and a phase shifter coupling the power distributor to the second antenna;
a transmission circuit configured to generate a transmission signal;
a reception circuit; and
a switch configured to couple the transmission circuit to the power distributor in a first switching condition controlled by a controller so that the power distributor provides the transmission signal to the first antenna via the first matching circuit and the transmission signal to the second antenna via the second matching circuit and the phase shifter, and configured to couple the reception circuit to the power distributor in a second switching condition controlled by the controller so that the power distributor provides a first received signal received at the first antenna to the reception circuit and a second received signal received at the second antenna to the reception circuit;
wherein the phase shifter is configured to generate a phase difference between the transmission signal provided to the first antenna and the transmission signal provided to the second antenna.
2. The electronic apparatus according to claim 1 , wherein power supplied from the transceiver circuit to the first antenna and power supplied from the transceiver circuit to the second antenna are equal to each other.
3. The electronic apparatus according to claim 1 , wherein the phase difference is within a range of 90° to 270°.