Patent ID: 9620857
Date: 2017-04-11
CPC Classifications: H01Q

Claim:
1. An antenna structure comprising: a main antenna comprising a feeding strip, a first radiating strip coupled to the feeding strip, and a first connecting strip coupled between the feeding strip and the first radiating strip; a parasitic antenna comprising a grounding strip, a second radiating strip coupled to the grounding strip, a second connecting strip, and a third radiating strip; the grounding strip positioned in a first plane, the second radiating strip positioned in a second plane substantially perpendicular to the first plane, the second connecting strip positioned coplanar with the second radiating strip and coupled between the second radiating strip and the grounding strip, the third radiating strip positioned coplanar with the second radiating strip, continuously extending from the second radiating strip, and coupled to a junction between the second radiating strip and the second connecting strip; the second radiating strip positioned adjacent to and apart from the first radiating strip, the second radiating strip configured to electromagnetically couple to and be parasitically fed by the first radiating strip; wherein the third radiating strip comprises a first section and a second section, the first section continuously extends from the second radiating strip; the second section is perpendicularly connected to one end of the first section away from the second radiating strip and extends along a direction away from the second radiating strip and towards the second connecting strip; the parasitic antenna and main antenna cooperatively generating at least one high-frequency resonate mode and a low-frequency resonate mode; a matching circuit electronically coupled to the feeding strip; and a switching circuit electronically coupled to the matching circuit, and configured to regulate an inductance value of the matching circuit output to the feeding strip, thereby regulating a central frequency of the low-frequency resonate mode.