Results 11 to 20 of about 5,290,066 (245)
A New Class of Broadband Arrays With Frequency Invariant Beam Patterns [PDF]
, 2004 In this paper, a new class of broadband arrays with frequency-invariant beam pattern is proposed. By suitable substitutions, the beam pattern of a continuous sensor array with continuous temporal processing can be regarded as the Fourier transform of its
S. Weiss +5 more
core +5 more sources
Design of frequency invariant beamformer for broadband arrays [PDF]
, 2007 A simple method for the design of a class of arrays with frequency invariant beam patterns is proposed. Starting from the desired frequency invariant beam pattern of an n-D array, the proposed method uses a series of substitutions and an n-D inverse ...
Weiss, Stephan +5 more
core +4 more sources
Design of a Novel High Frequency Ultrasound Annular Array [PDF]
, 2009 The design of a novel 50MHz 7-elment annular array is described. Equal-width electrodes are deposited on the rear face of piezoelectric layer to form a kerfless array, instead of mechanical cutting.
Harris, NR +5 more
core +2 more sources
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
doaj +1 more source
Space scanning FMCW-based two-dimensional frequency diverse array radar
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Frequency Diversity Array for DOA Estimation [PDF]
Mehran University Research Journal of Engineering and Technology, 2017 The localization of targets has been presented in this article. DOA (Direction of Arrival) is an important parameter to be determined by radar. The MLE (Maximum Likelihood Estimator) has been widely used to accurately and efficiently estimate the DOAs ...
NAUMAN ANWAR BAIG +2 more
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