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Near-field wideband channel estimation for extremely large-scale MIMO
Science China Information Sciences, 2022Extremely large-scale multiple-input-multiple-output (XL-MIMO) at millimeter-wave (mmWave) and terahertz (THz) bands plays an important role in supporting extreme high beamforming gain as well as ultra-wideband spectrum resources. Unfortunately, accurate
Mingyao Cui, L. Dai
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Advances in Materials, 2020
Artificially engineered metasurfaces provide extraordinary wave control at the subwavelength scale. However, metasurfaces proposed so far suffer due to limited bandwidths.
M. R. Akram +4 more
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Artificially engineered metasurfaces provide extraordinary wave control at the subwavelength scale. However, metasurfaces proposed so far suffer due to limited bandwidths.
M. R. Akram +4 more
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Wideband electromechanical stimulator
Medical & Biological Engineering, 1976An electromechanical stimulator with wideband characteristics is described. Nonlinear control techniques have been used to achieve a fast rise time, a speedy settling time, and a very small steady-state error. The device has been used in quantitative investigations on cutaneous receptor units.
M J, O'Connell, F, Khalafalla, S, Lal
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IEEE Transactions on Antennas and Propagation, 2021
In this article, a wideband and highly-integrated quad-element multiple-input multiple-output (MIMO) antenna is proposed for the first time, to adapt to the size-limited environment in fifth-generation (5G) smartphones.
Libin Sun, Yue Li, Zhijun Zhang
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In this article, a wideband and highly-integrated quad-element multiple-input multiple-output (MIMO) antenna is proposed for the first time, to adapt to the size-limited environment in fifth-generation (5G) smartphones.
Libin Sun, Yue Li, Zhijun Zhang
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Wideband 23.5–29.5-GHz Phased Arrays for Multistandard 5G Applications and Carrier Aggregation
IEEE transactions on microwave theory and techniques, 2021This article presents a 23.5–29.5-GHz $8\times 8$ phased array for wideband multistandard applications. The array is based on wideband high-performance $2\times 2$ transmit/receive (TRX) quad-beamformer chips with 6 bit of phase control and 8 bit of ...
Yusheng Yin +4 more
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Wideband local oscillator design for wideband transceivers
2011 IEEE International RF & Microwave Conference, 2011The wideband transceivers like the software defined radio require designing wideband RF hardware covering octave bands. The local oscillator of the mixer should be a wideband frequency synthesizer. Building on the theory of oscillations in the voltage controlled oscillator, the paper reviews the concept of negative resistance in the transistor circuit ...
Mehul R. Naik, C H Vithalani
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IEEE Transactions on Antennas and Propagation, 2020
This article presents a wideband orthogonal-mode dual-antenna pair with a shared radiator for fifth-generation (5G) multiple-input multiple-output (MIMO) metal-rimmed smartphones.
Libin Sun +3 more
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This article presents a wideband orthogonal-mode dual-antenna pair with a shared radiator for fifth-generation (5G) multiple-input multiple-output (MIMO) metal-rimmed smartphones.
Libin Sun +3 more
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Wideband and ultra wideband direct chaotic communications
ICCSC'02. 1st IEEE International Conference on Circuits and Systems for Communications. Proceedings (IEEE Cat. No.02EX605), 2003We introduce a high rate wireless communication scheme, based on wideband and ultra wideband chaotic carriers, generated directly in the microwave frequency band. The main features and performance of the proposed scheme are discussed. An experimental model of the system is designed and a series of experiments, demonstrating wireless transmission with ...
A.S. Dmitriev, A.I. Panas, D.Yu. Puzikov
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Communications in Theoretical Physics
This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating the temperature, the film can achieve multi-band absorption within the 30–45 THz range or ...
Wenxin Li +8 more
semanticscholar +1 more source
This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating the temperature, the film can achieve multi-band absorption within the 30–45 THz range or ...
Wenxin Li +8 more
semanticscholar +1 more source
2021
Wideband operation is often desired for modern wireless systems, applications include, data hungry multi-standard wireless communication systems, ultrahigh-resolution radars desired for connected and autonomous driving applications, imaging systems for healthcare or security applications.
Naeem, Umair, Fusco, Vincent
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Wideband operation is often desired for modern wireless systems, applications include, data hungry multi-standard wireless communication systems, ultrahigh-resolution radars desired for connected and autonomous driving applications, imaging systems for healthcare or security applications.
Naeem, Umair, Fusco, Vincent
openaire +2 more sources