Title :
Wide bandwidth mixer array development in millimeter wave imaging systems for plasma diagnostics
Author :
Shen, Zuowei ; Ito, Naoki ; Xia, Zhengang ; Domier, Calvin W. ; Mase, Atsushi ; Luhmann, N.C., Jr.
Author_Institution :
UC Davis, Davis
Abstract :
The development of imaging arrays on dielectric lens antennas for use in millimeter wave imaging systems is described. The 24-element 140-170 GHz and 22-element 110-140 GHz imaging mixer array are comprised of Schottky diodes and double dipole antenna arrays placed on an elliptical lens. This paper first describes the antenna development and then the characterization of the off-axis performance of the elliptical lens. The unequal spacing between antennas and channel number of the antenna arrays are determined based on the theoretically calculated off-axis far field patterns. A wide bandwidth balun used to reduce the mixer IF loss is also described.
Keywords :
lens antennas; millimetre wave imaging; plasma diagnostics; Schottky diodes; dielectric lens antennas; double dipole antenna arrays; elliptical lens; frequency 110 GHz to 170 GHz; imaging arrays; millimeter wave imaging systems; plasma diagnostics; wide bandwidth mixer array development in; Antenna arrays; Bandwidth; Dipole antennas; Impedance matching; Lenses; Microwave imaging; Millimeter wave technology; Plasma diagnostics; Plasma waves; Schottky diodes; Balun double dipole antenna; elliptical lens; imaging array;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516831
