Three-dimensional multi-frequency antenna
A three-dimensional multi-frequency antenna includes a substrate; a shorting wall vertically formed on a first edge of the substrate; a radiation element including a first radiator corresponding to a first resonance frequency band, and a second radiator corresponding to a second resonance frequency band, the first radiator and the second radiator capable of generating a frequency-multiplying third resonance frequency extending toward opposite directions; and a connection element, for connecting the shorting wall and the radiation element, separated from a second edge of the substrate by a gap; wherein the width of the radiation element and the gap conforms to a specific ratio.
1. A three-dimensional multi-frequency antenna comprising:
a substrate;
a shorting wall, directly connected to a first edge of the substrate;
a radiation element comprising:
a first radiator having a first sheet metal and a second sheet metal; and
a second radiator having a third sheet metal and a fourth sheet metal, the first radiator and the second radiator extending toward opposite directions;
a connection element having a first end directly connected to the shorting wall and a second end opposite to the first end of the connection element;
wherein the connection element is coupled along an edge of the connection element to a second edge of the substrate, and a spacing interval is set between the edge of the connection element and the second edge of the substrate; and
a feeding terminal connected between the radiation element and the connection element;
wherein the second end of the connection element is connected at a junction to the feeding terminal and the radiation element.
2. The multi-frequency antenna of claim 1 , wherein the connection element is a long strip of sheet metal.
3. The multi-frequency antenna of claim 1 , wherein the substrate comprises a sub substrate.
4. The multi-frequency antenna of claim 1 , wherein the substrate, the shorting wall and the first sheet metal of the first radiator are perpendicular to each other, and the substrate, the shorting wall and the third sheet metal of the second radiator are perpendicular to each other.
5. The multi-frequency antenna of claim 1 , wherein the second sheet metal and the fourth sheet metal have a bow tie structure.
6. The multi-frequency antenna of claim 1 , wherein the first radiator further comprises a fifth sheet metal coupled to the first sheet metal, and the second radiator further comprises a sixth sheet metal coupled to the third sheet metal.
7. The multi-frequency antenna of claim 1 , wherein the sum of a length of the first radiator and a length of the connection element is corresponding to quarter of a radio signal wavelength of a first resonance frequency band.
8. The multi-frequency antenna of claim 1 , wherein the sum of a length of the second radiator and a length of the connection element is corresponding to quarter of a radio signal wavelength of a second resonance frequency band.
9. The multi-frequency antenna of claim 1 , wherein the first radiator and the second radiator are further utilized for generating a frequency-multiplying third resonance frequency band.
10. The multi-frequency antenna of claim 1 , wherein the spacing interval is substantially between 0.5 mm and 5 mm.
11. The multi-frequency antenna of claim 1 , wherein a width of the radiation element and the spacing interval conform to a ratio, and the ratio is substantially between 1 and 15.
12. A three-dimensional multi-frequency antenna comprising:
a substrate formed on a first plane;
a shorting wall formed on a second plane, a side edge of the shorting wall directly connected to a first edge of the substrate;
a radiation element comprising:
a first radiator, corresponding to a first resonance frequency band, having a first sheet metal formed on a third plane and a second sheet metal paralleled with the first plane; and
a second radiator, corresponding to a second resonance frequency band, having a third sheet metal formed on the third plane and a fourth sheet metal paralleled with the first plane;
a connection element having a first end directly connected to the side edge of the shorting wall and a second end opposite to the first end of the connection element;
wherein the connection element is coupled along an edge of the connection element to a second edge of the substrate; and
a feeding terminal coupled between the radiation element and the connection element;
wherein the second end of the connection element is connected at a junction to the feeding terminal and the radiation element.
13. The multi-frequency antenna of claim 12 , wherein the connection a spacing interval is set between the entire edge of the connection element and the second edge of the substrate, and, the spacing interval is substantially between 0.5 mm and 5 mm.
14. The multi-frequency antenna of claim 13 , wherein a width of the radiation element and the spacing interval conform to a ratio, the ratio is substantially between 1 and 15.
15. The multi-frequency antenna of claim 12 , wherein the first plane, the second plane and the third plane are perpendicular to each other.
16. A three-dimensional multi-frequency antenna comprising:
a substrate;
a shorting wall directly connected to a first edge of the substrate;
a radiation element comprising:
a first radiator comprising at least a bend; and
a second radiator comprising at least a bend, the first radiator and the second radiator extending toward opposite directions; and
a connection element having a first end directly connected to the shorting wall and a second end opposite to the first end of the connection element;
wherein the connection element is coupled along an edge of the connection element to a second edge of the substrate; and
a feeding terminal coupled between the radiation element and the connection element;
wherein the second end of the connection element is connected at a junction to the feeding terminal and the radiation element.
17. The multi-frequency antenna of claim 16 further comprising a feeding terminal coupled between the radiation element and the connection element.
18. The multi-frequency antenna of claim 16 , wherein a spacing interval is set between the edge of the connection element and the second edge of the substrate, and the spacing interval is substantially between 0.5 mm and 5 mm.
19. The multi-frequency antenna of claim 18 , wherein a width of the first radiator and the spacing interval conform to a ratio, the ratio being substantially between 1 and 15.
20. The multi-frequency antenna of claim 18 , wherein a width of the second radiator and the spacing interval conform to a ratio, the ratio being substantially between 1 and 15.