A flat plate antenna

摘要: A flat plate transmit/receive antenna (1) is disclosed having first and second parallel waveguides (2, 3). waveguide bend (4) communicates energy between the 3) to enable transmission reception from an exposed (5) of (3) within which array apertures (6) formed. coupler or probe (8) provided at a focus (2) cause, on transmission, cylindrical phase front propagate along converted by planar in (3). Scanning dual polarisation embodiments are also disclosed.