Antenna and communication device thereof

1. 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.

2. The antenna of claim 1 , wherein a total path length of the closed conductor loop is between 1.4 wavelengths and 4.2 wavelengths of a center frequency of the operating band.

3. The antenna of claim 1 , wherein a length of a conductor path between the feeding portion and the short-circuit portion is between a 0.7 wavelength and 2.1 wavelengths of a center frequency of the operating band.

4. The antenna of claim 1 , wherein a matching circuit is configured between the feeding portion and the at least one signal source.

5. The antenna of claim 4 , wherein the matching circuit is a capacitive coupling feeding, an inductive coupling feeding, a low-pass, a high-pass, a band-pass, a band-reject, an L-type or a π-type circuit architecture.

6. The antenna of claim 1 , wherein the at least one ground is formed on the dielectric substrate through printing or etching method.

7. The antenna of claim 1 , wherein a path of the closed conductor loop has different conductor widths.

8. The antenna of claim 1 , wherein a path of the closed conductor loop has an inductor or a capacitor of distributed or lumped types.

9. The antenna of claim 1 , wherein other antenna radiating portions of different antenna types are capable of being configured besides the at least one radiating portion.

10. The antenna of claim 1 , wherein antenna radiating portions of planar inverted-F antenna types, inverted-F antenna types, monopole antenna types, dipole antenna types, slot antenna types, loop antenna types, helix antenna types, quadrifilar helix antenna types, N-filar helix antenna types or other combinations of antenna radiating portions of different antenna types thereof are capable of being configured besides the at least one radiating portion.

11. A communication device, comprising:

at least one transceiver module, configured to be at least one signal source; and

at least one antenna, electrically connected or coupled to the transceiver module, 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:

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, the at least one radiating portion makes the at least one antenna to generate an operating band, and the transceiver module is configured to transmit or receive electromagnetic signals of at least one communication band through the operating band generated by the at least one antenna,

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.

12. The communication device of claim 11 , wherein a total path length of the closed conductor loop is between 1.4 wavelengths and 4.2 wavelengths of a center frequency of the operating band.

13. The communication device of claim 11 , wherein a length of a conductor path between the feeding portion and the short-circuit portion is between a 0.7 wavelength and 2.1 wavelengths of a center frequency of the operating band.

14. The communication device of claim 11 , wherein a matching circuit is configured between the feeding portion and the at least one signal source.

15. The communication device of claim 14 , wherein the matching circuit is a capacitive coupling feeding, an inductive coupling feeding, a low-pass, a high-pass, a band-pass, a band-reject, an L-type or a π-type circuit architecture.

16. The communication device of claim 11 , wherein a path of the closed conductor loop has different conductor widths.

17. The communication device of claim 11 , wherein other antenna radiating portions of different antenna types are capable of being configured besides the at least one radiating portion.

18. The communication device of claim 11 , wherein antenna radiating portions of planar inverted-F antenna types, inverted-F antenna types, monopole antenna types, dipole antenna types, slot antenna types, loop antenna types, helix antenna types, quadrifilar helix antenna types, N-filar helix antenna types or other combinations of antenna radiating portions of different antenna types thereof are capable of being configured besides the at least one radiating portion.

19. The communication device of claim 11 , wherein a path of the closed conductor loop has an inductor or a capacitor of distributed or lumped types.