Results 241 to 250 of about 519,811 (291)

Lamb Wave Frequency Diverse Array

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022
The imaging method based on the conventional phased array (PA) can only realize angle focusing. To break through the above limitations, frequency diverse array (FDA) is first introduced from radar to Lamb wave, which opens up a possibility to realize angle-range focusing in damage localization. The energy pattern of FDA without considering the features
Yanfeng Lang   +3 more
openaire   +2 more sources

Frequency Diverse Array Information Geometry Analysis

2020 14th European Conference on Antennas and Propagation (EuCAP), 2020
Different classic phased-array that generates only angle-dependent transmit beampattern, frequency diverse array (FDA) offers both angle-dependent and range-dependent transmit beampattern. This paper adopts the information geometry theory to study the fundamental information resolution for a general FDA radar system.
Haifeng Yu   +5 more
openaire   +1 more source

Frequency diverse array: Simulation and design

2009 Loughborough Antennas & Propagation Conference, 2009
In this paper, the radiation characteristics of frequency diversity array are concerned. With a set of CW signals of different frequencies transmitted simultaneously from the array, the transient field is examined by electromagnetic field simulation software.
Jingjing Huang   +2 more
openaire   +2 more sources

Frequency Diverse Array Radars

2006 IEEE Conference on Radar, 2006
This paper presents a generalized structure for a frequency diverse array radar. In its simplest form, the frequency diverse array applies a linear phase progression across the aperture. This linear phase progression induces an electronic beam scan, as in a conventional phased array.
P. Antonik   +3 more
openaire   +1 more source

Spatially resolving antenna arrays using frequency diversity

Journal of the Optical Society of America A, 2016
Radio imaging devices and synthetic aperture radar typically use either mechanical scanning or phased arrays to illuminate a target with spatially varying radiation patterns. Mechanical scanning is unsuitable for many high-speed imaging applications, and phased arrays contain many active components and are technologically and cost prohibitive at ...
Daniel L, Marks   +2 more
openaire   +2 more sources

Frequency diverse array radar receiver architectures

2012 International Waveform Diversity & Design Conference (WDD), 2012
Frequency diverse array radar utilizes the principle of superposition to cohere energy, in a novel fashion, to achieve range dependent spatial patterns. While the theory for transmit spatial patterns has been developed, the need for efficient receiver design architectures persists.
Aaron M. Jones, Brian D. Rigling
openaire   +1 more source

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