Compound antenna device for omnidirectional coverage

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.