Results 21 to 30 of about 5,538,194 (288)
Impacts of frequency increment errors on frequency diverse array beampattern [PDF]
EURASIP Journal on Advances in Signal Processing, 2015 Different from conventional phased array, which provides only angle-dependent beampattern, frequency diverse array (FDA) employs a small frequency increment across the antenna elements and thus results in a range angle-dependent beampattern. However, due to imperfect electronic devices, it is difficult to ensure accurate frequency increments, and ...
Kuandong Gao +4 more
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Beampattern analysis of frequency diverse array radar: a review [PDF]
EURASIP Journal on Wireless Communications and Networking, 2021 AbstractElectronic beam steering is an essential feature of state-of-the-art radar systems. Conventional phased array (PA) radars with fixed carrier frequencies are well-known for electronically steering their beam with high directivity. However, the resulting beampattern is angle-dependent but range-independent.
Zeeshan Ahmad +2 more
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Frequency divided group beamforming with sparse spacefrequency code for above 6 GHz URLLC systems
ETRI Journal, 2022 In this study, we propose a limited feedback-based frequency divided group beamforming with sparse space-frequency transmit diversity coded orthogonal frequency division multiplexing (OFDM) system for ultrareliable low latency communication (URLLC ...
Chanho Yoon +3 more
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Micromachines, 2021 We demonstrate the generation of multiple orbital angular momentum (OAM) vortex beams with different radiating states at different frequencies through a laminated meta-surface lens consisting of a dual polarized meta-array interconnected with a frequency
Pengfei Gao, Rui Yang
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Transmit Waveform Optimization for Spatial-Frequency Diversity MIMO Radar in the Presence of Clutter
International Journal of Antennas and Propagation, 2014 Benefitting from the independent target echoes of diversity channels, diversity MIMO radar can efficiently improve system performance, such as target detection and parameter estimation. Due to the fact that the RCS (radar cross section) of complex target
Yonghao Tang +3 more
doaj +1 more source
IEEE Access, 2018 This paper proposes a new design of a dual-polarized base station antenna for sub-6-GHz 5G communication covering the band from 3.3 to 3.8 GHz. The proposed antenna offers a good impedance matching across the desired frequency band with $\text {VSWR ...
Ahmed Alieldin +4 more
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Research Progress and Prospect for the Noval Waveform Diverse Array Radar
Leida xuebao, 2021 It is difficult for the traditional radar to suppress deceptive mainlobe interference and separate the range ambiguous clutter. The proposal of a waveform diverse array changes the way of obtaining information through utilizing degrees-of-freedom in the ...
Shengqi ZHU +4 more
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Frequency Diverse Array with Cubic Sinusoidal Frequency Offset
Journal of Physics: Conference Series, 2020 Abstract Frequency diversity array radar (FDA) has range-angle dependent beampattern, providing enormous potential for the application of this new type of radar. However, the beampattern of conventional FDA (CFDA) has two problems: range-angle coupling and range periodicity, limiting the application of FDA.
Xinxin Qin, Changli Li
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A Flexible Phased-MIMO Array Antenna with Transmit Beamforming
International Journal of Antennas and Propagation, 2012 Although phased-array antennas have been widely employed in modern radars, the requirements of many emerging applications call for new more advanced array antennas.
Wen-Qin Wang, Huaizong Shao
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Isolation Enhancement of Wide-Band MIMO Array Antennas Utilizing Resistive Loading
IEEE Access, 2019 In this paper, we propose the use of resistor-loaded paired parallel-coupled resonators (PCRs) for mutual coupling reduction and isolation enhancement in wideband MIMO array antennas.
Jung-Dong Park +2 more
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