Antenna assemblies including dipole elements and Vivaldi elements

An antenna assembly comprising:

• a first radiating element module operable in at least a first frequency range, the first radiating element module including a plurality of dipole elements arranged in a dipole square;
• a second radiating element module operable in at least a second frequency range different than the first frequency range, the second radiating element module including a plurality of Vivaldi elements arranged in a crossed Vivaldi arrangement;
• and
• a reflector between the first and second radiating element modules such that the first and second radiating element modules are on opposite exterior and interior sides of the reflector, whereby the reflector is operable for isolating the plurality of Vivaldi elements from the plurality of dipole elements;
• wherein:
• the plurality of dipole elements comprises a first dipole element, a second dipole element, a third dipole element located opposite and across from the first dipole element in the dipole square;
• and a fourth dipole located opposite and across from the second dipole element in the dipole square;
• the first and third dipole elements are fed in phase and radiate with a first polarization;
• the second and fourth dipole elements are fed in phase and radiate with a second polarization orthogonal to the first polarization;
• the plurality of Vivaldi elements comprises a first Vivaldi element and a second Vivaldi element, the first and second Vivaldi elements having orthogonal polarizations relative to each other;
• the plurality of dipole elements comprises four dipole elements positioned at right angles relative to one another and aligned in an alignment of +/−45 degrees;
• and
• the reflector includes four walls defining a shape corresponding to the shape of the dipole square defined by the four dipole elements, each of the four walls being disposed between a corresponding one of the four dipole elements and the crossed Vivaldi elements.