Arrangement for improved isolation between adjacent cell areas
First Claim
1. A node in a wireless communication system, the node having a central point and comprising at least two antenna functions, each antenna function being arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area, two adjacent sector areas being separated by at least one corresponding border extending from the central point and running between the corresponding antenna functions, wherein the polarization of at least one of said antenna functions, between the borders of the corresponding sector area, varies over the azimuth directions associated with the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are orthogonal at the border.
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Abstract
The present invention relates to a node in a wireless communication system, the node having a central point and comprising at least two antenna functions. Each antenna function is arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area separated by corresponding borders. The polarization of at least one of said antenna functions is variable between the borders of the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are essentially orthogonal at the border. The present invention also relates to a corresponding wireless communication system and corresponding antenna functions.
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Citations
14 Claims
- 1. A node in a wireless communication system, the node having a central point and comprising at least two antenna functions, each antenna function being arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area, two adjacent sector areas being separated by at least one corresponding border extending from the central point and running between the corresponding antenna functions, wherein the polarization of at least one of said antenna functions, between the borders of the corresponding sector area, varies over the azimuth directions associated with the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are orthogonal at the border.
- 7. A wireless communication system comprising at least one node, said node having a central point and comprising at least two antenna functions, each antenna function being arranged to cover a corresponding sector area, the sector areas being positioned around the central point successively such that each sector area is adjacent to at least one other sector area, two adjacent sector areas being separated by at least one corresponding border extending from the central point and running between the corresponding antenna functions, wherein polarization of at least one of said antenna functions, between the borders of the corresponding sector area, varies over the azimuth directions associated with the corresponding sector area such that for each border, the polarizations of the antenna functions at each side of the border are orthogonal at the border.
- 13. An antenna function located in each sector of a wireless communication system, each antenna function being arranged to cover one sector area having at least two borders towards at least one other adjacent sector area, wherein the polarization of the antenna function, between said borders, varies over the azimuth directions associated with the corresponding sector area such that along each border, and wherein the polarization of the antenna function is orthogonal to the polarization in the corresponding adjacent sector area.
Specification