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A millimeter‐wave cylindrical conformal array with a 120° flat‐top broad beam and a stable 30° downward tilted‐angle is demonstrated, fabricated and measured in this paper. The radiating part consists of eight slotted waveguides, with 32‐element longitudinal slots per waveguide. The feeding network consists of a 1‐to‐8 unequal power divider and a compact phase compensating network, which was designed...