A Folded Reflectarray Antenna for 2D Scanning

A folded reflectarray antenna is presented which is able to scan its beam in two dimensions. The antenna is based on the bifocal approach with phase angle adjustments on a top and on a bottom reflector. Seven feeds are used to switch between different beams in one plane, and the backside reflector is tilted to scan in the orthogonal direction. For good performance, top and bottom reflector are designed is a special way. A sample antenna has been built and tested at 77 GHz.

[1]  F. Holt,et al.  A design procedure for dielectric microwave lenses of large aperture ratio and large scanning angle , 1957 .

[2]  R. Schneider,et al.  System aspects for future automotive radar , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[3]  H. H. Meinel.  Automotive Millimeter-wave Radar , 1998 .

[4]  Holger H. Meinel.  Automotive Millimeterwave Radar History and present Status , 1998, 1998 28th European Microwave Conference.

[5]  W. Menzel,et al.  A 76 GHz multiple-beam planar reflector antenna , 2002, 2002 32nd European Microwave Conference.

[6]  W. Menzel,et al.  A dual planar reflectarray with synthesized phase and amplitude distribution , 2005, IEEE Transactions on Antennas and Propagation.

[7]  W. Menzel,et al.  A 77 GHz FM/CW radar frontend with a low-profile, low-loss printed antenna , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[8]  I. Gresham,et al.  A compact manufacturable 76-77-GHz radar module for commercial ACC applications , 2001 .