Radar end-fire antenna array with expanded detection field

A radar device comprising:

• a plurality of printed circuit boards arranged in a substantially semi-cylindrical fan-shaped array such that the plurality of printed circuit boards extend radially outward from a central region;
• and
• a plurality of end-fire antenna arrays, each end-fire antenna array having a transmission end oriented in a different direction than the other end-fire antenna arrays, the plurality of end-fire antenna arrays being arranged in pairs on a respective one of the plurality of printed circuit boards such that each pair of end-fire antenna arrays are located in substantially the same plane and such the transmission ends of each pair of end-fire antenna arrays facing in directions that are at an angle from substantially 60 degrees to substantially 120 degrees relative to each other, the end-fire antenna arrays not being movable, each of the plurality of the end-fire antenna arrays having a detection range of more than 150 meters,
• the plurality of end-fire antenna arrays configured to create a collective detection field, the collective detection field being substantially semi-spherical.