Beam-pattern synthesis using slotted Rotman lenses
In this article, the design principle of the Rotman lens is reviewed, and an X-band lens for 10-GHz operating frequency is simulated and analyzed. Rotman lenses with circular and elliptical slots of different orientations are simulated, and their associated radiation patterns are plotted too. The characteristics of the radiation patterns generated by a linear array antenna and the slotted Rotman lenses are functions of the shape, dimensions, location, and orientation of the slots etched on the metallic surface of the lenses that feed the array. The computer simulation results demonstrate that, in addition to the other significant advantages of microwave lenses, there is a strong potential for using slotted Rotman lenses as convenient microwave devices for beam-pattern synthesis.  2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2011.
beam-pattern synthesis rotman lens slotted rotman lens array beamforming