Accession Number : ADA430796


Title :   Microbolometer Detectors for Passive Millimeter-Wave Imaging


Descriptive Note : Final rept.


Corporate Author : ARMY RESEARCH LAB ADELPHI MD


Personal Author(s) : Nemarich, Joseph


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA430796


Report Date : MAR 2005


Pagination or Media Count : 43


Abstract : Reports on far-infrared and infrared microbolometer detectors developed with cooled high temperature superconductor (HTSC) materials were reviewed to determine whether it would be feasible to use this type of detector in a passive millimeter wave camera (PMC). A base-line set of achievable HTSC microbolometer parameter values were identified and used to calculate the noise equivalent temperature difference (NETD) of a cooled MMW radiometer with this type of detector. The report includes results showing that the calculated NETD of such a radiometer operating at a 30-Hz modulation frequency would be between 3 and 6 K for an RF bandwidth between 70 and 40 GHz. A PMC with this NETD would be competitive with that of previously developed systems, be much less costly, and be suitable for a number of applications. The results of further calculations made to determine the HTSC microbolometer parameter values needed to obtain an improved MMW detector are included in the report.


Descriptors :   *DETECTORS , *FAR INFRARED RADIATION , *HIGH TEMPERATURE SUPERCONDUCTORS , MATERIALS , PASSIVE SYSTEMS , MILLIMETER WAVES , FEASIBILITY STUDIES , RADIOMETERS , BANDWIDTH , MILLIMETER WAVE EQUIPMENT , BOLOMETERS.


Subject Categories : OPTICS
      RADIOFREQUENCY WAVE PROPAGATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE