NDLI: The crow's nest antenna-experimental results

Content Provider	IEEE Xplore Digital Library
Author	Wilden, H. Ender, J.
Copyright Year	1990
Description	Author affiliation: FGAN-FFM, Wachtberg, West Germany (Wilden, H.; Ender, J.)
Abstract	The experimental radar system CNA-512 is introduced. Its core is a spatial array consisting of 512 statistically distributed microstrip antennas. The object is to demonstrate radar operation over 360 degrees without need for mechanical antenna rotation. The CNA-512, working at X-band, is designed for a look-direction-independent beamwidth of 2.7 degrees . The positions of the single elements (microstrip loop antennas) were determined via a 3D-Taylor density distribution. Each antenna element is to be equipped with a separate T/R-module, from which 60 have been realized in the first step. The array is subdivided into 32 subgroups with combination on the RF level; the individual signal outputs are down-mixed and digitized, allowing monopulse operation and adaptive null steering. Phase calibration for beamforming is achieved by the measurement of relative phases at a few reference elements inside the sphere. First experiments with the CNA-512 showed that transmit-receive operation and phase-steering work as projected.
Starting Page	280
Ending Page	285
File Size	603063
Page Count	6
File Format	PDF
DOI	10.1109/RADAR.1990.201177
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-05-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar antennas Phase shifters Phased arrays Microstrip antennas Array signal processing Switches Antenna arrays Marine vehicles Adaptive arrays Microstrip antenna arrays
Content Type	Text
Resource Type	Article

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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
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