NDLI: Meta-reflector antenna with annular pattern for electromagnetic orientation in UAS applications

Content Provider	IEEE Xplore Digital Library
Author	Eck, J. Morin, M. Warnick, K.F.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA (Eck, J.; Morin, M.; Warnick, K.F.)
Abstract	Unmanned Aerial Systems (UAS) often use GPS for navigation, but there are many scenarios in which GPS is inaccessible or inaccurate. GPS-denied navigational systems using optical and radar technologies have been proposed to supplement GPS. We present a novel antenna that produces an annular beam pattern ideal for down-looking navigational radar. This pattern is achieved using a monopole over a metasurface ground. The design uses a planar, focusing reflector technique based on a sub-wavelength grating to achieve a high gain pattern with a low profile antenna, and a null in the direction normal to the antenna plane. The annular radiation pattern reduces specular returns from the nadir direction below the UAS that can overdrive the radar electronics. The performance of a GPS-denied navigation system is simulated using the antenna pattern of the planar meta-reflector antenna.
Sponsorship	IEEE Antennas & Propag. Soc.
Starting Page	993
Ending Page	994
File Size	141045
Page Count	2
File Format	PDF
ISBN	9781479935383
ISSN	15223965
e-ISBN	9781479935406
DOI	10.1109/APS.2014.6904824
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar antennas Radar Gain Global Positioning System Gratings Electromagnetics
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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