Title :
Millimeter wave Rotman lens
Author :
Rausch, Ekkehart O. ; Peterson, Andrew F. ; Wiebach, Wolfgang
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic. Various lens designs were evaluated with a computer model based on the contour integral method. The best lens design was manufactured and characterized by measuring the scattering parameters between the beam and array ports within the frequency interval of interest. The measured S-parameters were processed to determine beam sidelobes and insertion loss. Maximum sidelobe levels ⩽-30 dB were obtained. The insertion loss of the lens was between 0.8 and 23 dB depending on the particular beam port that was excited and the operating frequency. The current lens design has 32 active antenna element array ports, 17 active beam ports, and a maximum scan angle of ±22.2
Keywords :
S-parameters; active antenna arrays; antenna testing; lens antennas; millimetre wave antenna arrays; 0.8 to 2.3 dB; 33 to 37 GHz; Ka-band; SHF; active antenna element array ports; active beam ports; array ports; beam port; beam sidelobes; computer model; contour integral method; frequency interval; insertion loss; lens designs; maximum scan angle; maximum sidelobe levels; metallized plastic; millimeter wave Rotman lens; scattering parameters measurement; Frequency; Insertion loss; Lenses; Manufacturing; Metallization; Millimeter wave measurements; Millimeter wave technology; Optical design; Plastics; Scattering parameters;
Conference_Titel :
Radar Conference, 1997., IEEE National
Conference_Location :
Syracuse, NY
Print_ISBN :
0-7803-3731-X
DOI :
10.1109/NRC.1997.588162
