NDLI: Passive millimetre-wave imaging with a planar diffraction antenna

Content Provider	IEEE Xplore Digital Library
Author	Harmer, S. Shylob, S. Sydorenkob, Y. Wheelerc, D. Dundonaldc, D.
Copyright Year	2014
Description	Author affiliation: Centre for Sensing & Imaging, Manchester Metropolitan Univ., Manchester, UK (Harmer, S.) \|\| Radio Phys. Solutions Inc., Salem, NH, USA (Wheelerc, D.; Dundonaldc, D.) \|\| Usikov Inst. of Radio Phys. & Electron. IRE, Kharkov, Ukraine (Shylob, S.; Sydorenkob, Y.)
Abstract	A dispersive antenna, formed by locating a dielectric sheet waveguide in the near-field zone of a millimetric scale diffraction grating, is described for the application of passive millimeter-wave imaging in the W-band. Two dimensional radiometric contrast images are formed by frequency scanning in the radial direction of the image and mechanically scanning in the azimuthal direction. Mechanical scanning is by means of rotation of the antenna at a uniform angular speed, while frequency scanning is achieved by careful selection of antenna parameters to provide a near linear dependence of beam angular position with frequency of ~1 degree per GHz. The imaging system operates over the frequency range 84-100 GHz and utilizes a single millimeter-wave LNA (Low Noise Amplifier) and mixer to produce a microwave frequency intermediate frequency; further down conversion stages result in 64 baseband channels. In this way, the 16 GHz operational bandwidth is divided into 64 equal width frequency channels, giving the system a field of view of ~16 degrees.
Starting Page	1095
Ending Page	1099
File Size	393618
Page Count	5
File Format	PDF
ISBN	9781479925810
DOI	10.1109/CSNDSP.2014.6923993
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-23
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	antenna concealed weapon detection Diffraction Surface waves Imaging Electromagnetic waveguides passive imaging system Diffraction gratings Dielectrics millimeter-wave Antennas
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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