We present a monolithically fabricated PolyStrata-based 64×64 array composed of 4096 tightly coupled dipole D-band elements connected by a 4096-way reactive corporate feed network, operating over the 130–175 GHz frequency range. Measured farfield patterns, return loss and realized gain versus simulation are captured. Additionally, we demonstrate the repeatability of the fabrication process by reporting on the performance of multiple smaller 16×16 arrays fabricated on the same mask set. Monolithically fabricated PolyStrata-based radiators can be an enabler for wafer-level scale arrays which require stable and well-matched input impedance, high efficiency and broadband performance.