NDLI: Arrays trilogy: adaptive-parametric-synthetic

Content Provider	IEEE Xplore Digital Library
Author	Kopp, L.
Copyright Year	2004
Abstract	Beyond the "diffraction limit" inherited from optics, that is now described as "Woodward's theorem", three kinds of antennas have demonstrated that this divine law may be bypassed. They have opened new fields for antennas. Within the framework of decision theory, adaptive array questions the pertinence of this limit as a measurement of the antenna's spatial resolution. This "cultural revolution" rejuvenated the landscape of antenna processing, its vocabulary (array manifold, spatial filtering, matched field, spatial coherence, etc.), its processing (SLC, MUSIC, ESPRIT, etc.) and its applications in a wide range of domains (telecom, sonar, radar, and medical ultrasound). Parametric array, while specific to the acoustic world, allows us to build very large-bandwidth transmit arrays, which are highly directive at low frequencies. They are a result of research on models in non-linear acoustics and are used in the underwater world (acoustic communication links, sounders, etc.) or in the air (sound projectors). Synthetic arrays take advantage of the physical array's movement to generate a large aperture, coherently combining successive receptions. Multiple applications include radar or sonar mapping, medical ultrasound, seismology, and even radio astronomy.
Starting Page	59
Ending Page	67
File Size	1396942
Page Count	9
File Format	PDF
ISBN	0780385454
DOI	10.1109/SAM.2004.1502908
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-18
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive arrays Antenna theory Antenna arrays Radar antennas Sonar applications Radar applications Ultrasonic imaging Acoustic arrays Underwater acoustics Biomedical acoustics
Content Type	Text
Resource Type	Article

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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
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