Antenna for ultra-wide band communication
An antenna for ultra-wide band communication is disclosed. The antenna includes a substrate, a patch formed on one side of the substrate so as to be smaller than the substrate, and being excited when an electric current is supplied through a feeder line, so as so radiate energy, and a ground area formed by removing a portion of another side of the substrate so as to obtain a wide band characteristic.
1. An antenna for ultra-wide band communication, comprising:
a substrate;
a patch formed on one side of the substrate so as to be smaller than the substrate, and being excited when an electric current is supplied through a feeder line, so as to radiate energy;
a ground area formed on another side of the substrate so as to obtain a wide band characteristic; and
a plurality of matching stubs directly contacting each other and being formed between the patch and the feeder line, so as to perform an impedance matching between the patch and the feeder line,
wherein the ground area extends from an edge of the substrate to a position that is less than a corresponding position of an edge of the patch formed on the one side of the substrate such that the ground area does not extend under the patch.
2. The antenna according to claim 1 , wherein the substrate is a printed circuit board.
3. The antenna according to claim 1 , wherein the substrate is formed of any one of low resistance silicon, glass, alumina, teflon, epoxy, low temperature co-fired ceramic.
4. The antenna according to claim 1 , wherein the patch is formed to have a center frequency of 5.8 gigahertz (GHz).
5. The antenna according to claim 1 , wherein the patch is formed in a shape of any one of a circle, a triangle, a rectangle, and a polygon.
6. The antenna according to claim 1 , further comprising an air gap slot formed in the patch, so as to control a frequency band of the antenna.
7. The antenna according to claim 6 , wherein the air gap slot is formed in a shape of any one of a circle, a triangle, a rectangle, and a polygon.
8. The antenna according to claim 1 , wherein the matching stubs are formed in a shape of any one of a rectangle, a trapezoid, and a circle, and are formed in an array form.
9. The antenna according to claim 1 , wherein one of the matching stubs being adjacent to the feeder line has a width smaller than that of another one of the matching stubs.
10. The antenna according to claim 1 , wherein the ground area is formed in a single patch form.
11. The antenna according to claim 10 , further comprising an air gap slot formed within the ground area.
12. The antenna according to claim 11 , wherein the air gap slot is formed in a shape of any one of a circle, a triangle, a rectangle, and a polygon.
13. The antenna according to claim 1 , wherein the patch is formed on the substrate in one of a single-layered structure and a multi-layered structure.
14. The antenna according to claim 1 , wherein an area of the patch is smaller than an area of the substrate such that the substrate completely surrounds the patch.
15. The antenna according to claim 1 , wherein a length of the ground area extends along the entire length of the substrate and the height of the ground area extends to the position that is less than the edge of the patch to thereby form a single patch form ground area.
16. The antenna according to claim 1 , wherein the plurality of matching stubs include a first stub directly contacting the patch and a second stub located between the first stub and the feeder line, and wherein a width of the second stub is less than a width of the first stub.
17. The antenna according to claim 16 , wherein the patch is formed on a top middle surface of the substrate and is surrounded by the substrate, and the feeder line extends from an edge of the substrate to the second stub directly contacting the first stub.
18. The antenna according to claim 16 , wherein a width of the first stub is less than a width of the second stub, and a width of the feeder line is less than a width of the second stub.