A 94-GHz planar monopulse receiver

Millimetre‐wave polarization‐dependant monopulse printed Fresnel reflector

“…Furthermore, tuning of 90 the C-patches provides a phase change of 180 [8] rotation of the C-element. The 135 zone is made with a Cpatch including a central disk.…”

“…Monolithic millimeterwave horns using pyramidal cavities etched in silicon has been used to obtain the sum pattern, and the difference pattern of monopulse antenna [7,8] that can be used in a radar receiver [9]. More recently, a monopulse reflectarray antenna has been electronically switched to give either a sum or a difference radiation pattern by using only two bias voltage states and a liquidcrystal mixture with a tunable phase range of 90 [10].…”

“…In addition, millimetre-wave radar antennas tend to include more and more functionalities, like beam scanning [6] or monopulse mode of operation [7][8][9][10]. Monolithic millimeterwave horns using pyramidal cavities etched in silicon has been used to obtain the sum pattern, and the difference pattern of monopulse antenna [7,8] that can be used in a radar receiver [9].…”