Antenna structure and electronic device including the same

Abstract

An electronic device is provided. The electronic device includes a communication circuit configured to communicate with an external device, and a processor configured to control the communication circuit, wherein the communication circuit includes a coil antenna including a first coil of a loop type which rotates with a number of times in a first direction, and a second coil of a loop type which is extended from the first coil, configured to rotate with a number of times in a second direction, and spaced from the first coil by a specific distance, and an antenna control circuit electrically connected with the coil antenna and configured to transmit or receive a signal with the coil antenna.

What is claimed is: 
     
         1 . An electronic device comprising:
 a communication circuit configured to communicate with an external device;   a processor configured to control the communication circuit,   wherein the communication circuit comprises:
 a coil antenna including a first coil of a loop type that rotates with a first number of rotation times in a first direction, and 
 a second coil of a loop type that is extended from the first coil, configured to rotate with a second number of rotation times in a second direction, and spaced from the first coil by a specific distance; and 
   an antenna control circuit electrically connected with the coil antenna and configured to transmit or receive a signal with the coil antenna.   
     
     
         2 . The electronic device of  claim 1 ,
 wherein the first coil and the second coil are arranged on a same surface, and   wherein the second coil is configured to form a loop, which is smaller than a loop formed by the first coil, in the loop formed by the first coil.   
     
     
         3 . The electronic device of  claim 1 , wherein the second direction is same as the first direction. 
     
     
         4 . The electronic device of  claim 1 , wherein the second number of rotation times is same as the first number of rotation times. 
     
     
         5 . The electronic device of  claim 1 , wherein the first coil and the second coil are arranged to face each other on different surfaces. 
     
     
         6 . The electronic device of  claim 5 ,
 wherein the first coil is arranged at the front surface of the electronic device, and   wherein the second coil is arranged at the rear surface of the electronic device.   
     
     
         7 . The electronic device of  claim 5 , wherein the second direction is different from the first direction. 
     
     
         8 . The electronic device of  claim 1 , wherein the communication circuit further comprises a metallic antenna connected with opposite ends of the first coil, which is divided into two parts, and configured to form a loop together with the first coil. 
     
     
         9 . The electronic device of  claim 8 ,
 wherein the metallic antenna is a multiple band antenna, and   wherein the communication circuit further comprises an RF circuit to communicate with an external device through the metallic antenna.   
     
     
         10 . The electronic device of  claim 9 , wherein the communication circuit further comprises:
 a first switch placed between the second coil and the antenna control circuit and configured to switch a signal between the second looped coil and the antenna control circuit; and   a second switch placed between the metallic antenna and the RF circuit and configured to switch a signal between the metallic antenna and the RF circuit.   
     
     
         11 . The electronic device of  claim 9 , wherein the communication circuit further comprises:
 a third filter placed between the second coil and the antenna control circuit and configured to filter a signal between the second coil and the antenna control circuit; and   a fourth filter between the metallic antenna and the RF circuit and configured to filter a signal that between the metallic antenna and the RF circuit.   
     
     
         12 . The electronic device of  claim 1 , wherein the coil antenna is configured to communicate with the external device in near field communication (NFC) under control of the antenna control circuit. 
     
     
         13 . The electronic device of  claim 1 , wherein the coil antenna further comprises:
 a first connection part connected with an end of the first coil; and   a second connection part connected with an end of the second coil,   wherein the antenna control circuit is configured to transmit and receive a signal with the coil antenna through the first connection part or the second connection part.   
     
     
         14 . The electronic device of  claim 13 , wherein the communication circuit further comprises:
 a signal processing circuit configured to:
 process a signal received from the antenna control circuit, and 
 supply a signal to the coil antenna through the first connection part or the second connection part. 
   
     
     
         15 . The electronic device of  claim 14 , wherein the signal processing circuit comprises:
 a filter circuit configured to filter a portion of a frequency band of a signal received from the antenna control circuit; and   a frequency control circuit configured to modify a resonance frequency of a signal received from the filter.   
     
     
         16 . An antenna structure comprising:
 at least one printed circuit board; and   a coil antenna arranged on the at least one printed circuit board,   wherein the coil antenna comprises:
 a first coil of a loop type configured to rotate with a first number of rotation times in a first direction; and 
 a second coil of a loop type extended from the first coil, configured to rotate with a second number of rotation times in a second direction, and spaced from the first coil by a specific distance. 
   
     
     
         17 . The antenna structure of  claim 16 ,
 wherein the first coil and the second coil are arranged on the same printed circuit board, and   wherein the second coil is configured to form a loop, which is smaller than a loop formed by the first coil, in the loop formed by the first coil.   
     
     
         18 . The antenna structure of  claim 17 , wherein the second direction is same as the first direction. 
     
     
         19 . The antenna structure of  claim 16 , wherein the first coil and the second coil are arranged to face each other on different printed circuit boards. 
     
     
         20 . An electronic device comprising:
 a housing including a first surface toward a first direction and a second surface toward a second direction that is opposite to the first direction;   at least one communication circuit included in the housing;   a wireless charging circuit included in the housing;   a printed circuit board included in the housing and configured to have a surface parallel with the first surface or the second surface;   a first coil having a first diameter in view of the top of the second surface and including at least one turn;   a second coil configured to have a second diameter, which is smaller than the first diameter, in view of the top of the second surface, arranged in an interior surrounded by the turns of the first coil, and configured to include at least one turn; and   a third coil configured to have a third diameter, which is smaller than the second diameter, in view of the top of the second surface, arranged in an interior surrounded by the turns of the second coil, and configured to include at least one turn,   wherein the first coil, the second coil, and the third coil are arranged in or adjacent to the printed circuit board,   wherein the first coil and the third coil are electrically connected with the communication circuit, and   wherein the second coil is electrically connected with the wireless charging circuit.