Antenna structure and wireless communication device employing same

A wireless communication device comprising:

• a printed circuit board;
• and
• an antenna structure comprising:
• a feeding portion electronically coupled to the printed circuit board the feeding portion comprising a first side and a second side parallel to the first side of the feeding portion;
• a first grounding portion positioned adjacent to and spaced apart from the first side of the feeding portion, and further electronically coupled to the printed circuit board;
• a second grounding portion positioned adjacent to and spaced apart from the second side of the feeding portion, and further electronically coupled to the printed circuit board;
• wherein the first grounding portion is positioned at the first side of the feeding portion and the second grounding portion is positioned at the second side of the feeding portion, a first slit is defined between the feeding portion and the first grounding portion, and a second slit is defined between the feeding portion and the second grounding portion;
• a first loop antenna defined to receive a second loop antenna position inside and between the first loop antenna and electronically coupled to the first and second grounding portions, wherein the first loop antenna comprises a first meander strip, a second meander strip, a third meander strip, a fourth meander strip, and a fifth meander strip, all of which are coupled together in sequence starting from the first meander strip and ending with the fifth meander strip;
• the first meander strip extends from the first grounding portion, and is positioned in a first plane;
• the second meander strip is positioned in a second plane that is substantially perpendicular to the first plane;
• the fourth meander strip is positioned in the second plane and facing towards the second meander strip;
• the third meander strip is coupled between the second and fifth meander strips and is positioned in a third plane substantially parallel to the first plane;
• the fifth meander strip extends from the second grounding portion away from the first meander strip;
• and
• the second loop antenna positioned inside and spaced part from the first loop antenna, and further electronically coupled to the feeding portion.

A wireless communication device comprising:

• a printed circuit board;
• and
• an antenna structure comprising:
• a feeding portion electronically coupled to the printed circuit board the feeding portion comprising a first side and a second side parallel to the first side of the feeding portion;
• a first grounding portion positioned adjacent to and spaced apart from the first side of the feeding portion, and further electronically coupled to the printed circuit board;
• a second grounding portion positioned adjacent to and spaced apart from the second side of the feeding portion, and further electronically coupled to the printed circuit board;
• a first loop antenna defined to receive a second loop antenna position inside and between the first loop antenna, and electronically coupled to the first and second grounding portions, wherein the first loop antenna comprises a first meander strip, a second meander strip, a third meander strip, a fourth meander strip, and a fifth meander strip, all of which are coupled together in sequence starting from the first meander strip and ending with the fifth meander strip;
• the first meander strip extends from the first grounding portion, and is positioned in a first plane;
• the second meander strip is positioned in a second plane that is substantially perpendicular to the first plane;
• the fourth meander strip is positioned in the second plane and facing toward the second meander strip;
• the third meander strip is coupled between the second and fifth meander strips and is positioned in a third plane substantially parallel to the first plane;
• the fifth meander strip extends from the second grounding portion away from the first meander strip;
• and
• the second loop antenna positioned inside and spaced apart from the first loop antenna, and further electronically coupled to the feeding portion
• a dielectric substrate positioned at an end of the printed circuit board;
• and
• an universal serial bus (USB) connector;
• wherein a cutout is defined in the dielectric substrate, the feeding portion, the first grounding portion and the second grounding portion are positioned on the dielectric substrate and are located adjacent to a same side of the cutout;
• the USB connector is received in the cutout.