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

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

481

Lastpage

484

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference (EuRAD), 2012 9th European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2471-7

Type

conf

Filename

6450741