Title :
A microwave sensor system based on reverse modelling of the array factor
Author :
Costanzo, Alessandra ; Masotti, Diego ; Arbizzani, Nicola ; Rizzoli, Vittorio ; Mastri, Franco
Author_Institution :
DEIS, Univ. of Bologna, Cesena, Italy
Abstract :
The paper describes a possible circuit implementation of a low-cost, non-invasive sensor system for wireless structural monitoring. It consists of a two-tags array and one reader: the former is the sensor placed on the structure to be monitored, the latter is placed in a predetermined position with respect to the array phase center. Particular attention is devoted to the antenna design, in order to manage cross-polarized signals in the system activity. The simple operating principle of the system exploits the far-field array-factor definition, in particular the positions, on the reader side, of the nulls of the received radiation surface. A proof of concept of the sensor is experimental demonstrated for two operating frequencies, 2.45 and 5.8 GHz.
Keywords :
antenna phased arrays; sensor arrays; antenna design; array phase center; cross-polarized signal; far field array factor definition; microwave sensor system; noninvasive sensor system; received radiation surface; reverse modelling; system activity; two-tags array; wireless structural monitoring; Antenna measurements; Arrays; Bifurcation; Microwave antenna arrays; Microwave communication; Oscillators; Displacement sensor; RFID; antenna array; interferometry;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6206087