NDLI: Robust transmit nulling in phased array antennas

Content Provider	IEEE Xplore Digital Library
Author	Vouras, P. de Graaf, J.
Copyright Year	2011
Description	Author affiliation: Naval Research Laboratory, Washington D.C., 20375, USA (Vouras, P.; de Graaf, J.)
Abstract	The ability to create nulls in the transmit pattern of a phased array antenna has many applications for radar systems, including interference and clutter mitigation. Most nulling techniques introduce small perturbations in amplitude and phase, or phase-only, at each element of the phased array. For practical reasons, phase-only perturbations are desired and they create acceptable rms levels of null depth. However, the phase shift at each element will vary with the frequency of the transmitted signal. As a result, the depth and pointing accuracy of the transmit null will not be uniform over the bandwidth of the transmitted signal. This paper will describe some of the inherent limitations in achieving robust transmit nulling performance over a wide bandwidth when using phase-only, open-loop control on a typical phased array antenna. Some solutions to overcome these limitations and improve the performance of transmit nulls will be proposed.
Starting Page	2101
Ending Page	2103
File Size	596632
Page Count	3
File Format	PDF
ISBN	9781467303217
ISSN	10586393
e-ISBN	9781467303231
DOI	10.1109/ACSSC.2011.6190399
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Bandwidth Interference Transmitting antennas Robustness Frequency dependence Finite impulse response filter wide bandwidth array antenna phase-only transmit null
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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