Patent ID: 8854273

Claim:
An antenna, comprising: at least one ground; and at least one radiating portion, wherein the at least one ground is disposed on a dielectric substrate, and the at least one radiating portion comprises: at least one signal source; and a closed conductor loop without a fracture, having a first coupling conductor portion and a second coupling conductor portion, and having a plurality of bending portions to form a three-dimensional structure, wherein a first coupling gap is formed between the first and the second coupling conductor portions, the closed conductor loop further has a feeding portion and a short-circuit portion to form a second coupling gap therebetween, the feeding portion is electrically connected or coupled to the at least one signal source, the short-circuit portion is electrically connected or coupled to the at least one ground, and the at least one radiating portion makes the antenna to generate an operating band, which is configured to transceive electromagnetic signals of at least one communication band, wherein one end of the feeding portion is connected to one end of the short-circuit portion via part of the bending portions and the first coupling conductor portion, and another end of the feeding portion is connected to another end of the short-circuit portion via part of the bending portions and the second coupling conductor portion, wherein the first coupling gap is not more than a 0.25 wavelength of a center frequency of the operating band and the second coupling gap is not more than a 0.1 wavelength of a center frequency of the operating band, wherein the first coupling gap is formed to increase an orthogonality of current vectors on a path of the closed conductor loop and current vectors of a signal feeding terminal of the radiating portion, and the second coupling gap makes the feeding portion and the short-circuit portion to form a mutual coupling structure.