Perpendicular Rotman phased array front end device

A front end of a radar system comprising:

• a transmit front end device including a transmit planar component;
• and
• a receive front end device including a receive planar component, each of the transmit planar component and the receive planar component including a corresponding:
• a first end;
• a second end located opposite the first end;
• a cavity space bounded by beam ports along a first side of the cavity space and by array ports along a second side of the cavity space, the cavity space being in operative communication with the beam ports and with the array ports to form a Rotman lens;
• and
• a linear array of antennas located along the second end of the planar component, each of the antennas being in operative communication with a corresponding one of the array ports,
• wherein the transmit planar component and receive planar component are arranged such that the linear array of antennas of the transmit planar component and the linear array of antennas of the receive planar component are perpendicular to one another,
• wherein the transmit planar component, the receive planar component, or both the transmit planar component and the receive planar component include a corresponding first set of waveguides that extend between the first end of the planar component and the beam ports and a corresponding second set of waveguides that extend between the array ports and the second end of the planar component.