Title :
Characterization of Reconfigurable LC-Reflectarrays Using Near-Field Measurements
Author :
Dieter, Sabine ; Moessinger, Alexander ; Mueller, Stefan ; Jakoby, Rolf ; Menzel, Wolfgang
Author_Institution :
Inst. of Microwave Tech., Univ. of Ulm, Ulm
Abstract :
A new measurement method for characterization of liquid crystal reflectarrays (LC) is presented. The phase and amplitude characteristics are determined by near-field measurements close to the antenna surface, using high resolution probes, which have been developed to resolve individual patches on the reflectarray. Measurement results showed a phase angle range of 280deg of individual detected LC patches. The measurement setup and corresponding measurement results at 35 GHz are presented. The procedure used for measurement automation is also explained.
Keywords :
microstrip antenna arrays; microwave antenna arrays; phase measurement; amplitude measurements; antenna surface; frequency 35 GHz; individual patches; liquid crystal reflectarrays; measurement automation; near-field measurements; phase measurements; reconfigurable LC-reflectarrays; Antenna measurements; Crystalline materials; Liquid crystals; Microwave measurements; Microwave theory and techniques; Phase detection; Phase measurement; Probes; Reflection; Reflector antennas; High resolution probe; liquid crystal; near-field characterization; reconfigurable antenna; reflectarray;
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
DOI :
10.1109/GEMIC.2009.4815846
