Antenna device and mobile terminal

Abstract

The present disclosure provides an antenna device including a radio frequency transceiving circuit; a matching circuit electrically coupled to the radio frequency transceiving circuit; and a metal housing provided with at least one micro-seam band, an edge of the metal housing including an arc-shaped section, the at least one micro-seam including an arc-shaped part matching the arc-shaped section. The radio frequency transceiving circuit is electrically coupled to the metal housing through the matching circuit, such that the metal housing is used as a radiating body of the antenna device. The metal housing is grounded through a grounding wire provided with an on-off switch configured to control the grounding wire. The micro-seam band includes three to twenty arc-shaped micro-seams, a metal strip is formed between the adjacent micro-seams, and the metal strip has the same material as the metal housing. The present disclosure further provides a mobile terminal.

What is claimed is: 
     
         1 . An antenna device, comprising:
 a radio frequency transceiving circuit;   a matching circuit, electrically coupled to the radio frequency transceiving circuit; and   a metal housing, an edge of the metal housing comprising an arc-shaped section, the metal housing being provided with at least one micro-seam band, the at least one micro-seam band comprising an arc-shaped part, the arc-shaped part matching the arc-shaped section of the metal housing, wherein the radio frequency transceiving circuit is electrically coupled to the metal housing by means of the matching circuit, such that the metal housing is used as a radiating body of the antenna device, the metal housing is grounded by means of a grounding wire, and the grounding wire is provided with an on-off switch configured to control the grounding wire;   wherein the micro-seam band comprises three to twenty arc-shaped micro-seams, a metal strip is formed between the adjacent micro-seams, and the metal strip has the same material as the metal housing.   
     
     
         2 . The antenna device according to  claim 1 , wherein each of the micro-seams has a seam width of 0.03 mm. 
     
     
         3 . The antenna device according to  claim 2 , wherein one micro-seam band is provided and extends non-penetratingly from the edge of the metal housing to an interior of the metal housing, such that parts of the metal housing at both sides of the micro-seam band are coupled into a whole. 
     
     
         4 . The antenna device according to  claim 2 , wherein one micro-seam band is provided and divides the metal housing into two independent metal zones, and the two metal zones are electrically coupled to the matching circuit and the grounding wire correspondingly. 
     
     
         5 . The antenna device according to  claim 2 , wherein one micro-seam band is provided and divides the metal housing into two independent metal zones, and one of the metal zones is electrically coupled to the matching circuit and the grounding wire. 
     
     
         6 . The antenna device according to  claim 2 , wherein two micro-seam bands are provided, and divide the metal housing into a first metal zone located in the middle, and a second metal zone and a third metal zone located at two ends of the first metal zone, and two metal zones of the first metal zone, the second metal zone and the third metal zone are electrically coupled to the matching circuit and the grounding wire correspondingly. 
     
     
         7 . The antenna device according to  claim 2 , wherein two micro-seam bands are provided, and divide the metal housing into a first metal zone located in the middle, and a second metal zone and a third metal zone located at two ends of the first metal zone, and one metal zone of the first metal zone, the second metal zone and the third metal zone is electrically coupled to the matching circuit and the grounding wire. 
     
     
         8 . The antenna device according to  claim 3 , wherein a distance between two adjacent micro-seams is larger than the seam width of the micro-seam. 
     
     
         9 . The antenna device according to  claim 4 , wherein a distance between two adjacent micro-seams is larger than the seam width of the micro-seam. 
     
     
         10 . The antenna device according to  claim 5 , wherein a distance between two adjacent micro-seams is larger than the seam width of the micro-seam. 
     
     
         11 . The antenna device according to  claim 6 , wherein a distance between two adjacent micro-seams is larger than the seam width of the micro-seam. 
     
     
         12 . The antenna device according to  claim 7 , wherein a distance between two adjacent micro-seams is larger than the seam width of the micro-seam. 
     
     
         13 . The antenna device according to  claim 8 , wherein the metal housing comprises a pair of short edges disposed oppositely and in parallel and a pair of long edges disposed oppositely and in parallel, the micro-seams extend parallel to the pair of short edges or the pair of long edges. 
     
     
         14 . The antenna device according to  claim 13 , wherein the micro-seam is filled with a signal non-shielding material. 
     
     
         15 . A mobile terminal, comprising an antenna device comprising:
 a radio frequency transceiving circuit;   a matching circuit, electrically coupled to the radio frequency transceiving circuit; and   a metal housing, an edge of the metal housing comprising an arc-shaped section, the metal housing being provided with at least one micro-seam band, the at least one micro-seam band comprising an arc-shaped part, the arc-shaped part matching the arc-shaped section of the metal housing, wherein the radio frequency transceiving circuit is electrically coupled to the metal housing by means of the matching circuit, such that the metal housing is used as a radiating body of the antenna device, the metal housing is grounded by means of a grounding wire, and the grounding wire is provided with an on-off switch configured to control the grounding wire;   wherein the micro-seam band comprises three to twenty arc-shaped micro-seams, a metal strip is formed between the adjacent micro-seams, and the metal strip has the same material as the metal housing.   
     
     
         16 . The mobile terminal according to  claim 15 , wherein each of the micro-seams has a seam width of 0.03 mm. 
     
     
         17 . The mobile terminal according to  claim 16 , wherein one micro-seam band is provided and extends non-penetratingly from the edge of the metal housing to an interior of the metal housing, such that parts of the metal housing at both sides of the micro-seam band are coupled into a whole. 
     
     
         18 . The mobile terminal according to  claim 16 , wherein one micro-seam band is provided and divides the metal housing into two independent metal zones, and the two metal zones are electrically coupled to the matching circuit and the grounding wire correspondingly. 
     
     
         19 . The mobile terminal according to  claim 16 , wherein one micro-seam band is provided and divides the metal housing into two independent metal zones, and one of the metal zones is electrically coupled to the matching circuit and the grounding wire. 
     
     
         20 . The mobile terminal according to  claim 16 , wherein two micro-seam bands are provided, and divide the metal housing into a first metal zone located in the middle, and a second metal zone and a third metal zone located at two ends of the first metal zone, and two metal zones of the first metal zone, the second metal zone and the third metal zone are electrically coupled to the matching circuit and the grounding wire correspondingly.