Antenna Arrangement
A Vivaldi antenna is disclosed, including an antenna upper part, and an antenna throat, wherein the antenna upper part is tilted, in respect to the antenna throat, at a predetermined location of the antenna upper part. The antenna upper part may be tilted, in respect to the antenna throat, by one or more predetermined tilted angles respectively at one or more predetermined locations of the antenna upper part. A corresponding antenna pair, antenna array and base station are also disclosed.
1 . A Vivaldi antenna comprising
an antenna upper part, and
an antenna throat,
wherein the antenna upper part is tilted, in respect to the antenna throat, at a predetermined location of the antenna upper part.
2 . An antenna according to claim 1 , wherein the antenna upper part is tilted, in respect to the antenna throat, by one or more predetermined tilted angles respectively at one or more predetermined locations of the antenna upper part.
3 . A Vivaldi antenna pair comprising two or more Vivaldi antennas according to claim 1 .
4 . An antenna pair according to claim 3 , wherein the antenna element upper part is tilted inwardly and/or outwardly.
5 . An antenna pair according to claim 3 , wherein the antenna pair comprises a combining network located on an antenna side or antenna opposite side of a reflector element.
6 . An antenna pair according to claim 3 , wherein the antenna pair comprises a combining network located inside or outside a casing formed by the antennas.
7 . An antenna pair according to claim 3 , wherein the antenna pair comprises an impedance matching network implemented in a combining network and located inside or outside a casing formed by the antennas.
8 . An antenna pair according to claim 3 , wherein the antenna pair comprises impedance transformers and/or discrete components for impedance matching.
9 . An antenna pair according to claim 3 , wherein the antenna pair comprises a ground plane for impedance matching.
10 . An antenna pair according to claim 3 , wherein the antenna pair comprises one or more ground planes as additional reflector elements inside or outside a casing formed by the antennas.
11 . An antenna pair according to claim 3 , wherein the antenna pair comprises a T-junction at a predetermined position of a combining network.
12 . An antenna pair according to claim 3 , wherein the antenna pair comprises a modified reflector element for obtaining desired radiation pattern of the antenna pair, wherein the modified reflector element comprises a shape-modified reflector blade and/or added parts.
13 . An antenna pair according to claim 3 , wherein it comprises an increased distance between a reflector element and the antennas for de-creasing antenna directivity.
14 . An antenna pair according to claim 3 , wherein it comprises an increased distance between the antennas for increasing antenna directivity.
15 . An antenna pair according to claim 3 , wherein it comprises a decreased distance to reflector for increasing antenna directivity.
16 . A Vivaldi antenna array comprising two or more antenna pairs according to claim 3 .
17 . An antenna array according to claim 16 , wherein polarizations of the antenna pairs are combined by using a combining network at an antenna side of a reflector element.
18 . An antenna array according to claim 16 , wherein a reflector element comprises a common ground plane on a bottom side of the reflector element for combining polarization ground planes, such that isolation between polarizations of the antenna pairs is increased, and a spacing between the common ground plane and the reflector element is increased.
19 . An antenna array according to claim 16 , wherein reflector elements are isolated from each other.
20 . A base station comprising at least one of an antenna, antenna pair and antenna array according to claim 1 .