Compound antenna device for omnidirectional coverage

1. A composite antenna device configured for omnidirectional operation, comprising:

a first antenna system configured for use in a first frequency band of a first frequency range, comprising multiple first antenna elements arranged in a cylindrical configuration;

a second antenna system configured for use in a second frequency band in a second frequency range at a frequency which is lower than the first frequency band; and

a housing enclosing the first and second antenna systems, wherein the first and the second antenna systems are configured for omnidirectional operation about an axis of the composite antenna device, and wherein the first and second antenna systems are arranged in the housing in a longitudinal direction along the axis.

2. The composite antenna device of claim 1 , wherein each first antenna element comprises an array panel, wherein each array panel is arranged with a panel surface facing away from said axis.

3. The composite antenna device of claim 2 , comprising an electronic module, comprising a baseband modem and a radio frequency unit connected to the first and second antenna systems.

4. The composite antenna device of claim 3 , wherein the radio frequency unit is connected to the baseband modem without intermediary frequency converter.

5. The composite antenna device of claim 3 , wherein said electronic module is arranged inside said cylindrical configuration.

6. The composite antenna device of claim 5 , comprising a transmit/receive switch for each array panel, arranged inside said cylindrical configuration.

7. The composite antenna device of claim 6 , wherein the baseband modem is configured to control the switch for Time Division Duplex (TDD) operation of the respective array panel to activate only one array panel at a time.

8. The composite antenna device of claim 1 , further comprising an interface at a first end of the housing for connection to an electronic device, wherein the first antenna system is arranged closer to said interface than the second antenna system is.

9. The composite antenna device of claim 1 , wherein the second antenna system comprises a plurality of second antenna elements disposed on orthogonal surfaces of a cross-shaped support structure.

10. The composite antenna device of claim 1 , wherein the first antenna system is arranged concentrically around the second antenna system, wherein the second antenna system acts as a reflector for the first antenna system.

11. The composite antenna device of claim 10 , wherein the multiple first antenna elements are arranged around the second antenna system.

12. The composite antenna device of claim 10 , wherein each first antenna element is arranged at a distance to the second antenna system, which distance correlates to a quarter wavelength of a frequency in the first frequency band.

13. The composite antenna device of claim 10 , wherein the second antenna system includes a plurality of second antenna elements arranged around said axis.

14. The composite antenna device of claim 10 , wherein the second antenna system includes a central second antenna element.

15. The composite antenna device of claim 1 , wherein a projection of the first antenna system and a projection of the second antenna system on a plane perpendicular to said axis define overlapping respective areas.

16. The composite antenna device of claim 1 , wherein the first frequency range is in a mm wave spectrum.

17. A video camera device, comprising an imaging unit including an image sensor, and a composite antenna device according to claim 1 connected to said imaging unit for transmission of video data.