Portable electronic device having loop antenna arrangement
A portable electronic device determines to which processing portion a signal received by a loop antenna is suited and can preferably perform different types of noncontact communication. The portable electronic device includes: an antenna including a first loop portion and a second loop portion; a signal processing portion that processes a signal received at the antenna; a signal detection portion; and in a state in which a single loop antenna formed by the first loop portion and the second loop portion is connected with the signal detection portion, a control portion that delivers a signal received at the single loop antenna to the signal processing portion, and delivers a signal received at the first loop portion to the signal processing portion.
1. A portable electronic device, comprising:
a body;
an antenna including a first loop portion and a second loop portion, each being arranged at a different position of the body;
a signal processing portion that processes a signal received at the antenna;
a signal detection portion that detects a first signal or a second signal received at the antenna; and
a control portion that, in a state in which a single loop antenna formed by the first loop portion and the second loop portion is connected with the signal detection portion, delivers a signal received at the single loop antenna to the signal processing portion, in a case of the first signal being detected by the signal detection portion, and delivers a signal received by the first loop portion to the signal processing portion, in a case of the second signal being detected at the signal detection portion, wherein the body includes a first face and a second face that face each other, the first loop portion being disposed at the first face of the body, the second loop portion being disposed at the second face of the body,
wherein the body includes:
a first body including the first face;
a second body including the second face; and
a coupling portion that couples the first body and the second body to be openable and closable around an opening-closing axis so as to be able to enter: a closed state in which the first body and the second body are disposed to be layered with a face of the first body on an opposite side to the first face and a face of the second body on an opposite side to the second face facing each other; and an opened state in which the first body and the second body are aligned in a predetermined direction with the first face and the second face being separated from each other, and
wherein, upon the single loop antenna being formed in the opened state, the first loop portion and the second loop portion are disposed at the first body or the second body, respectively, so as to suppress cancellation between the signal received at the first loop portion and the signal received at the second loop portion.
2. The portable electronic device according to claim 1 , wherein
in a state in which a single loop antenna formed by the first loop portion and the second loop portion is connected with the signal detection portion, the control portion delivers the signal received by the first loop portion to the signal processing portion and delivers the signal received by the second loop portion to the signal detection portion in a case of the second signal being detected at the signal detection portion, and delivers the signal received by the first loop portion to the signal detection portion and delivers the signal received by the second loop portion to the signal processing portion in a case of the second signal being detected by the signal detection portion that is connected with the second loop portion.
3. The portable electronic device according to claim 1 , further comprising:
a magnetic field shielding member disposed in at least one of the first body and the second body,
wherein the first loop portion and the second loop portion are respectively disposed at the first body or the second body, so that a loop direction of the first loop portion when viewed in the layering direction of the first body and the second body and a loop direction of the second loop portion when viewed in the layering direction in the closed state are opposite directions to each other, and
wherein the magnetic field shielding member is disposed between the first loop portion and the second loop portion in the closed state.
4. The portable electronic device according to claim 1 , wherein
the first loop portion is disposed in a region of the first body at a side of the coupling portion; and
the second loop portion is disposed in a region of the second body at a side of the coupling portion.
5. A portable electronic device, comprising:
a body;
an antenna including a first loop portion and a second loop portion, each being disposed at a different position inside the body;
a first signal processing portion and a second signal processing portion that process signals received at the antenna, respectively;
a signal detection portion that is connected with the first signal processing portion and detects a first signal or a second signal received at the antenna; and
a control portion that, in a state in which a single loop antenna formed by the first loop portion and the second loop portion is connected with the signal detection portion, processes a signal received at the single loop antenna by way of the first signal processing portion in a case of the first signal being detected by the signal detection portion, and connects the first loop portion with the second signal processing portion and connects the second loop portion with the signal detection portion in a case of the second signal being detected by the signal detection portion, wherein the body includes a first face and a second face that face each other, the first loop portion being disposed at the first face of the body, the second loop portion being disposed at the second face of the body,
wherein the body includes:
a first body including the first face;
a second body including the second face; and
a coupling portion that couples the first body and the second body to be openable and closable around an opening-closing axis so as to be able to enter: a closed state in which the first body and the second body are disposed to be layered with a face of the first body on an opposite side to the first face and a face of the second body on an opposite side to the second face facing each other; and an opened state in which the first body and the second body are aligned in a predetermined direction with the first face and the second face being separated from each other, and
wherein, upon the single loop antenna being formed in the opened state, the first loop portion and the second loop portion are disposed at the first body or the second body, respectively, so as to suppress cancellation between the signal received at the first loop portion and the signal received at the second loop portion.
6. The portable electronic device according to claim 5 , wherein
the control portion connects the first loop portion with the signal detection portion and connects the second loop portion with the second signal processing portion in a case of the second signal being detected by the signal detection portion that is connected with the second loop portion.