Antennas, multi-antenna apparatus, and antenna housings

A multi-antenna apparatus, comprising:

• a housing enclosing a global navigation satellite system (GNSS) antenna and a radio antenna;
• the radio antenna positioned beneath the GNSS antenna, the radio antenna comprising:
• a shielding element dimensioned to substantially match the horizontal cross-section dimensions of the GNSS antenna;
• a ground plane element dimensioned to substantially match the horizontal cross-section dimensions of the GNSS antenna;
• an array of conductive mast elements configured to receive radio signals and driven by an electrical current to transmit radio signals, wherein the array of conductive mast elements are positioned between the shielding element and ground plane element;
• and
• a conductive and hollow tubular passage positioned between and providing a passageway through the shielding element and ground plane element such that wiring may pass through the hollow tubular passage for communicating signal with the GNSS antenna;
• wherein the array of conductive mast elements and the hollow tubular passage are positioned relative to one another between the shielding element and ground plane element such that when the electrical current is supplied to drive the array of conductive mast elements to transmit radio signals, and a radiation of the radio signals from the driven array of conductive mast elements in combination with radiation off the non-driven hollow tubular passage has a substantially omnidirectional azimuthal radiation pattern.