Antenna arrangement for MIMO antenna applications
An antenna arrangement includes a baseplate having a center, a bottom face and a top face. At least two first antenna elements are arranged on the top face and extend radially away from the center. Each of the at least two first antenna elements comprises a with respect to the base plate essentially perpendicular arranged first section, which is arranged radially towards the center. The first section merges into a second section which is arranged with respect to the base plate essentially parallel and extends away from the first section in a first direction. The second section merges into a third section arranged with respect to the base plate essentially perpendicular extending away from the second section above the first section. The third section merges into a fourth section arranged with respect to the base plate essentially parallel extending away from the third section opposite to the first direction.
1 . An antenna arrangement comprising
a. a baseplate having a center, a bottom face and a top face;
b. at least two first antenna elements arranged on the top face in a rotational symmetric manner with respect to each other, wherein each of the at least two first antenna elements comprises:
i. a first section essentially perpendicularly arranged with respect to the base plate;
ii. the first section merges into a second section arranged with respect to the base plate essentially parallel extending away from the first section in a first direction;
iii. the second section merges into a third section arranged with respect to the base plate essentially perpendicular extending away from the second section above the first section;
iv. the third section merges into a fourth section arranged with respect to the base plate essentially parallel extending away from the third section opposite to the first direction.
2 . The antenna arrangement according to claim 1 , wherein the first section comprises a lower edge arranged adjacent to the top face and comprising a feeding port to feed a signal into the first antenna element.
3 . The antenna arrangement according to claim 2 , wherein the lower edge comprises between the feeding port and the dorsal end of the first antenna element a curved portion extending away from the top face of the base plate.
4 . The antenna arrangement according to claim 3 , wherein the first antenna element comprises a grounding element arranged adjacent to the curved portion of the lower edge at the dorsal end of the first antenna element, interconnecting the first antenna element to the base plate.
5 . The antenna arrangement according to claim 1 , wherein the first through the fourth sections of the first antenna element are planar and merge into each other by straight edges in an angled manner.
6 . The antenna arrangement according to claim 1 , wherein the first through the fourth sections form an essentially hook-shaped cross section.
7 . The antenna arrangement according to claim 1 , wherein a stabilizer is arranged at the least-one of dorsal end of the first antenna element interconnecting at least the fourth section of the first antenna element to the ground plate.
8 . The antenna arrangement according to claim 1 , wherein the first antenna element comprises at a dorsal end a shielding element being arranged transversal with respect to radial direction of the first antenna element.
9 . The antenna arrangement according to claim 8 , wherein the shielding element is arranged adjacent to the second section and the third section.
10 . The antenna arrangement according to claim 1 , wherein at least one fourth section comprises attachment means to attach a second antenna element.
11 . The antenna arrangement according to claim 1 , wherein the fourth section is arranged at an angle with respect to the top face of the base plate sloping towards the distal end of the first antenna element.
12 . The antenna arrangement according to claim 11 wherein in a top view the two first antenna elements are each arranged on an essentially L-shaped conductive layer.
13 . The antenna arrangement-according to claim 1 , wherein at least one of the third section and the fourth section are split by a channel into a first radiator and a second radiator.
14 . The antenna arrangement according to claim 13 , wherein in a top view the first radiator has a squared shape and the second radiator is U-shaped and arranged circumferentially around the first radiator.
15 . The antenna arrangement according to claim 1 , wherein the first antenna element comprises bent sheet metal.
16 . The antenna arrangement according to claim 1 , wherein the first antenna elements are arranged on the base plate in a windmill-like arrangement equally spaced apart from each other in circumferential direction.
17 . The antenna arrangement according to claim 1 , wherein a GNSS-antenna is arranged at the center of the base plate.
18 . The antenna arrangement according to claim 17 , wherein the GNSS-antenna is in a top view arranged between the at least two first antenna elements.
19 . The antenna arrangement according to claim 17 , wherein the GNSS-antenna is attached to a radome encompassing in an assembled position the at least two first antenna elements.
20 . The antenna arrangement according to claim 1 , wherein at least one third antenna element is arranged in circumferential direction between neighboring first antenna elements.