Omni-directional MIMO antenna
An omni-directional MIMO antenna comprises: a board; a first feed line and a second feed line formed on the board and spaced apart from each other; a first radiator receiving a feed signal from the first feed line; a second radiator receiving a feed signal from the second feed line; a first ground pattern that surrounds the first feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board; a second ground pattern that surrounds the second feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board; a parasitic patch formed on a rear surface of the board; a first feed point formed on the rear surface and providing a feed signal to the first feed line and a second feed point formed on the rear surface and providing a feed signal to the second feed line.
1. An omni-directional MIMO antenna, the antenna comprising:
a board;
a first feed line and a second feed line formed on the board and spaced apart from each other;
a first radiator receiving a feed signal from the first feed line;
a second radiator spaced apart from the first radiator by a predetermined distance and receiving a feed signal from the second feed line;
a first ground pattern that surrounds the first feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board;
a second ground pattern that is spaced apart from the first ground pattern by a predetermined distance, surrounds the second feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board;
a parasitic patch formed on a rear surface of the board; and
a first feed point formed on the rear surface of the board and providing a feed signal to the first feed line and a second feed point formed on the rear surface of the board and configured to provide a feed signal to the second feed line,
wherein, from the parasitic patch, first and second projections protrude in a direction of the first feed point and the second feed point.
2. The omni-directional MIMO antenna according to claim 1 ,
wherein the first and second projections protrude such that the first feed point and the second feed point are positioned between the first projection and the second projection.
3. The omni-directional MIMO antenna according to claim 1 ,
wherein the parasitic patch is disposed such that a partial region of the parasitic patch is overlapped with the first ground pattern and the second ground pattern vertically.
4. The omni-directional MIMO antenna according to claim 2 ,
wherein the omni-directional MIMO antenna further includes a connection element electrically connecting the first radiator and the second radiator and having a length of λ/2.
5. The omni-directional MIMO antenna according to claim 4 ,
wherein on one side of the first ground pattern, a first stub is formed in a direction of the second ground pattern.
6. The omni-directional MIMO antenna according to claim 5 ,
wherein on one side of the second ground pattern, a second stub is formed in a direction of the first ground pattern, and the first stub and the second stub are adjacent to each other to enable electromagnetic coupling.
7. The omni-directional MIMO antenna according to claim 6 ,
wherein on the connection element, a third stub is formed to protrude in a space direction between the first ground pattern and the second ground pattern.
8. An omni-directional MIMO antenna, the antenna comprising:
a board;
a first feed line and a second feed line formed on the board and spaced apart from each other;
a first radiator receiving a feed signal from the first feed line;
a second radiator spaced apart from the first radiator by a predetermined distance and receiving a feed signal from the second feed line;
a first ground pattern that surrounds the first feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board;
a second ground pattern that is spaced apart from the first ground pattern by a predetermined distance, surrounds the second feed line, is electrically connected to a ground, and extends in a longitudinal direction of the board; and
a parasitic patch formed on a rear surface of the board,
wherein, on one side of the first ground pattern, a first stub is formed in a direction of the second ground pattern, and on one side of the second ground pattern, a second stub is formed in a direction of the first ground pattern.
9. The omni-directional MIMO antenna according to claim 8 ,
wherein the first stub and the second stub are adjacent to each other to enable electromagnetic coupling.
10. The omni-directional MIMO antenna according to claim 8 ,
wherein on the rear surface of the board, a first feed point providing a feed signal to the first feed line and a second feed point for providing a feed signal to the second feed line are formed.
11. The omni-directional MIMO antenna according to claim 10 ,
wherein, from the parasitic patch, first and second projections protrude in a direction of the first feed point and the second feed point.
12. The omni-directional MIMO antenna according to claim 11 ,
wherein the first and second projections protrude such that the first feed point and the second feed point are positioned between the first projection and the second projection.
13. The omni-directional MIMO antenna according to claim 9 ,
wherein the parasitic patch is disposed such that a partial region of the parasitic patch is overlapped with the first ground pattern and the second ground pattern vertically.
14. The omni-directional MIMO antenna according to claim 9 ,
wherein the omni-directional MIMO antenna further includes a connection element electrically connecting the first radiator and the second radiator and having a length of λ/2.
15. The omni-directional MIMO antenna according to claim 14 ,
wherein on the connection element, a third stub is formed to protrude in a space direction between the first ground pattern and the second ground pattern.