Design of W-Band Cassegrain Antenna for Beam Steering

Abstract

In this paper, for the mechanical beam steering of the Cassegrain antenna, the steering performances of the main reflector tilting method are characterized, and the Cassegrain antenna for the antenna rotating method is designed and its performances are measured. In the Cassegrain antenna operating at W-band, the changes of characteristics due to changes in the sizes of the main/sub-reflectors and other structural changes are analyzed to obtain the structural variables satisfying the performance goal. The manufactured antenna in W-band shows the measured gain of 42.08 dBi, 3 dB beamwidth of 1.32°, 1.14° and the return loss(  ) of -23.58 dB at the center frequency of 94 GHz.

Design and Measurement of a Two-Dimensional Beam-Steerable Metasurface for Ka-Band Communication Systems

“…A drawing using the MS reflector technology concept as a sub-reflector in a Cassegrain antenna is shown in Figure 15. In this configuration, the MS steers the beam from the feed and changes its direction, accordingly, improving the directivity, which becomes an issue in 5G point-to-point MMW communication [36]. Furthermore, the suggested configuration enables real-time control over the beam direction and increased stability, which are needed due to environmental influences, such as wind and temperature differences [34].…”