Antenna arrangements

摘要

The present invention relates to an antenna arrangement (100) comprising an antenna part comprising at least two antenna means, each with a number of first antenna elements having a first polarization and a number of second antenna elements having a second polarization different from said first polarization, said antenna part further comprising antenna part ports. There are two antenna part ports for each antenna means, one antenna part port for each polarization, and the antenna arrangement (100) further comprises polarization controlling means (30), comprising a distribution network, to which the antenna part ports are connected, and which includes at least a main forming network with external interface antenna ports (301,302,303,304). The polarization controlling means (30) is configured to connect antenna part ports and external interface antenna ports (301, 302, 303, 304).

主权项

1. An antenna arrangement comprising:
an antenna part comprising a first antenna and a second antenna, wherein the first antenna is a column array that includes a first plurality of antenna elements having a first polarization and a second plurality of antenna elements having a second polarization different from said first polarization and wherein the second antenna is a column array that includes a third plurality of antenna elements having the first polarization and a fourth plurality of antenna elements having the second polarization, and wherein the first plurality of antenna elements and the second plurality of antenna elements are centered along a first axis, and the third plurality of antenna elements and the fourth plurality of antenna elements are centered along a second axis offset from the first axis, the antenna arrangement further comprising: four antenna part ports in communication with the first plurality of antenna elements, the second plurality of antenna elements, the third plurality of antenna elements, and the fourth plurality of antenna elements, respectively; a polarization controller that comprises a distribution network connected to the four antenna part ports, wherein the distribution network includes at least a main forming network having external interface antenna ports and pre-forming network that is connected to the four antenna part ports and to the main forming network, wherein the pre-forming network includes intermediate ports and a first sub-network and a second sub-network, wherein the first sub-network outputs on two of the intermediate ports a first set of intermediate signals that have the first polarization and different beam orientations among themselves, and wherein the second sub-network outputs on another two of the intermediate ports a second set of intermediate signals that have the second polarization and different beam orientations among themselves, wherein the main forming network includes a third sub-network and a fourth sub-network that are connected to the intermediate ports of the pre-forming network such that intermediate signals from the pre-forming network having the same polarization are inputted to different ones of the third sub-network and the fourth sub-network, and wherein the polarization controller is configured to introduce a desired variation in polarization properties of beams associated with said external interface antenna ports.