Antenna structure

An antenna structure, comprising:

• a substrate;
• a radiator mounted at one end of a front surface of the substrate, the radiator having a first radiating portion, two portions of a middle of one end edge of the first radiating portion extending horizontally to form a second radiating portion, and a feeding portion approaching the second radiating portion, a free end of the feeding portion being a feeding end, the other end edge of the first radiating portion extending horizontally and opposite to the one end edge of the first radiating portion, then extending downward, next extending towards the other end edge of the first radiating portion, later extending upward and finally extending horizontally and opposite to the one end edge of the first radiating portion to form a rectangular spiral third radiating portion;
• and
• a grounding element mounted at the other end of the front surface of the substrate and approaching the radiator, the grounding element having a first grounding portion, a second grounding portion and a connecting portion, the connecting portion having a connecting edge facing towards the one end edge of the first radiating portion, the connecting edge being spaced from the one end edge of the first radiating portion, an upper portion and a lower portion of the connecting edge extending horizontally and towards the one end edge of the first radiating portion to form the first grounding portion and the second grounding portion, the feeding portion being positioned among the first grounding portion, the second grounding portion and the connecting portion, the second radiating portion being positioned among the first radiating portion, the feeding portion and one of the first grounding portion and the second grounding portion, the feeding end of the feeding portion approaching the middle of the connecting edge of the connecting portion, the feeding end of the feeding portion being spaced from the middle of the connecting edge of the connecting portion, the first grounding portion and the second grounding portion of the grounding element.

An antenna structure, comprising:

• a substrate;
• a radiator mounted at one end of a front surface of the substrate, the radiator having:
• a first radiating portion having one end edge, and the other end edge opposite to the one end edge;
• a feeding portion horizontally extending from a middle of the one end edge of the first radiating portion, a free end of the feeding portion being a feeding end;
• a second radiating portion horizontally extending from the middle of the one end edge of the first radiating portion, the second radiating portion approaching the feeding portion to cause a coupling effect between the feeding portion and the second radiating portion;
• and
• a third radiating portion extending along a spiral path and extending from the other end edge of the first radiating portion;
• and
• a grounding element mounted at the front surface of the substrate and approaching the radiator, the grounding element surrounding the feeding portion to form a parasitic effect between the grounding element and the feeding portion.