Antenna
An antenna includes a substrate, a feed line formed on one surface of the substrate, a ground plane formed on the other surface of the substrate, a short-circuit stub that extends from a terminating end of the feed line and contacts the ground plane, and slits formed on the ground plane so as to cross the feed line.
1. An antenna comprising:
a substrate;
a feed line formed in a direction on one surface of the substrate;
a ground plane formed on the other surface of the substrate;
a short-circuit stub that extends in the same direction with the feed line from a terminating end of the feed line for tuning a resonant frequency of the antenna, wherein a terminating end of the short-circuit stub makes contact with the ground plane; and
a slit formed on the ground plane so as to cross the feed line.
2. The antenna of claim 1 , wherein the ground plane is a metal rear case.
3. The antenna of claim 1 , wherein the substrate is a ferrite sheet.
4. The antenna of claim 1 , further comprising an additional stub that extends from one side of the feed line.
5. The antenna of claim 1 , wherein at least one end of the slit is open from an end of the ground plane to an external space.
6. The antenna of claim 5 , wherein the slit is formed from one end to the other end of the ground plane, and each end of the slit is open from an end of the ground plane to an external space.
7. The antenna of claim 1 , wherein the slit is formed on the ground plane so as to perpendicularly cross the feed line.
8. The antenna of claim 1 , wherein a coupling point, at which coupling between the slit and the feed line occurs, is formed on each of the slit, and the slit has the same symmetrical length on both ends thereof based on the coupling point.
9. The antenna of claim 1 , further comprising additional slit formed on the ground plane so as to cross the slit.