Results 11 to 20 of about 5,461,422 (271)
Tangent hyperbolic circular frequency diverse array radars
The Journal of Engineering, 2016 Frequency diverse array (FDA) with uniform frequency offset (UFO) has been in spot light of research for past few years. Not much attention has been devoted to non-UFOs in FDA. This study investigates tangent hyperbolic (TH) function for frequency offset
Sarah Saeed +3 more
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Ultra-Wideband Imaging via Frequency Diverse Array with Low Sampling Rate
Remote Sensing, 2022 Imaging systems based on millimeter waves (mm-waves) are advancing to achieve higher resolution and wider bandwidth. However, a large bandwidth requires high sample rates, which may limit the development of ultra-wideband imaging systems. In this letter,
Zhonghan Wang, Yaoliang Song, Yitong Li
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Range-Angle-Dependent Beamforming by Frequency Diverse Array Antenna [PDF]
International Journal of Antennas and Propagation, 2012 This paper proposes a range-angle-dependent beamforming for frequency diverse array (FDA) antenna systems. Unlike conventional phased-array antenna, the FDA antenna employs a small amount of frequency increment compared to the carrier frequency across ...
Wen-Qin Wang, Huaizong Shao, Jingye Cai
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Advances on Frequency Diverse Array Radar and Its Applications
Leida xuebao, 2018 Unlike the conventional phased array that provides only angle-dependent transmit beampattern, Frequency Diverse Array (FDA) employs a small frequency increment across its array elements to produce automatic beam scanning without requiring phase shifters ...
Wang Wenqin +3 more
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Cognitive MIMO Frequency Diverse Array Radar with High LPI Performance [PDF]
International Journal of Antennas and Propagation, 2016 Frequency diverse array (FDA) has its unique advantage in realizing low probability of intercept (LPI) technology for its dependent beam pattern. In this paper, we proposed a cognitive radar based on the frequency diverse array multiple-input multiple ...
Ling Huang +3 more
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Frequency diverse array with random logarithmically increasing frequency offset [PDF]
Microwave and Optical Technology Letters, 2020 AbstractThe frequency diverse arrays (FDAs) have been extensively investigated since it can provide a unique angle‐range‐dependent beampattern. This range‐dependent characteristic can suppress the range ambiguous clutters, leading to many novel potential Radar applications.
Gaojian Huang +3 more
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Space scanning FMCW-based two-dimensional frequency diverse array radar [PDF]
The Journal of Engineering, 2019 The frequency-modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is extended to two dimensions (2D). The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased ...
Savaş Karadağ +2 more
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Joint Decoupling Optimization of Frequency Offsets and Array Elements for Frequency Diverse Arrays
International Journal of Antennas and PropagationFrequency diverse array (FDA) has a distance-angle–dependent beam direction map, which has a greater application advantage than phased array. However, due to the distance-angle coupling and periodicity of its beam direction map, it makes the parameter ...
Yuming Lu +4 more
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Antenna Element Index Modulation for Frequency Diverse Array
International Journal of Antennas and Propagation, 2019 In this paper, we propose a new architecture and provide performance analysis for frequency diverse array (FDA) Radar combined with the index modulation (IM) techniques. Here, the IM concept is applied upon frequency offsets in an FDA.
Gaojian Huang +3 more
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On the Sideband Harmonics in Pulsed Frequency Diverse Arrays [PDF]
IEEE Access, 2023 Pulsed frequency diverse arrays (FDAs) have recently garnered significant research attention in radar and sensing applications due to their range-dependent radiation properties. However, the time-dependent nature of radiation can limit the benefits of FDAs.
Ihsan Kanbaz +4 more
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