Title :
Near-field measurements of a millimeter-wave reflectarray at 120 GHz
Author :
Makela, S. -M. ; Tamminen, A. ; Ala-Laurinaho, Juha ; Raisanen, Antti V. ; Koivisto, Paivi ; Saily, J. ; Hakli, J. ; Rantakari, Pekka ; Tuovinen, Reijo ; Luukanen, A.
Author_Institution :
Dept. of Radio Sci. & Eng., Aalto Univ., Espoo, Finland
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
In this paper, we describe the near-field measurements of the surface of a 120 GHz reflectarray. The reconfigurable offset-fed reflectarray under development consist of approximately 3700 coplanar patch antenna elements which are individually controlled by 4-state micro-electro-mechanical (MEMS) phase shifters. Measurements of a static reflectarray preceding the MEMS-controlled one are done in order to characterize the behavior of individual antenna elements of the reflectarray. Measurement setup, probe selection and the effect of the directional coupler are described. Amplitude and phase patterns of the reflectarray are shown. Also the main characteristics of the static reflectarray under test are presented.
Keywords :
antenna feeds; directional couplers; micromechanical devices; microstrip antenna arrays; millimetre wave antenna arrays; millimetre wave phase shifters; reflectarray antennas; 4-state micro-electro-mechanical; MEMS phase shifters; coplanar patch antenna elements; directional coupler; frequency 120 GHz; millimeter wave reflectarray; near field measurements; probe selection; reconfigurable offset fed reflectarray; Antenna measurements; Phase measurement; Probes; Reflection; Reflector antennas; Surface waves; antenna measurements; millimeter-wave; near-field-probe measurements; reflectarray;
Conference_Titel :
Radar Conference (EuRAD), 2012 9th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2471-7
