Results 11 to 20 of about 136,872 (324)
Millimeter-wave communication for a last-mile autonomous transport vehicle [PDF]
, 2020 Low-speed autonomous transport of passengers and goods is expected to have a strong, positive impact on the reliability and ease of travelling. Various advanced functions of the involved vehicles rely on the wireless exchange of information with other ...
Higgins, Matthew D. +4 more
core +1 more source
Remote Sensing, 2022 Passive multi-frequency microwave sensors are indispensable instruments for worldwide environmental monitoring. However, they often suffer from the issues of poor spatial resolution and the original land–sea transition zone data are contaminated severely.
Weidong Hu +6 more
doaj +1 more source
IEEE Access, 2019 In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G millimeter-wave multiple-input-multiple-output (MIMO) communication is presented.
Ruoqiao Zhang +4 more
doaj +1 more source
Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom
IEEE Open Journal of Antennas and Propagation, 2022 In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam.
Daniel Edelgaard Serup +2 more
doaj +1 more source
Nanophotonics, 2022 Metasurfaces have attracted significant attention in recent years due to their unprecedented light-manipulation abilities. However, most metasurfaces so far have relied on external light excitation, prohibiting them from full on-chip integration ...
Wu Geng-Bo +3 more
doaj +1 more source
User Impact on Phased and Switch Diversity Arrays in 5G Mobile Terminals
IEEE Access, 2018 In this paper, a mobile terminal phased array at 28 GHz with different scan angles is compared with a switch diversity antenna array at 28 GHz in the case of antenna beams pointing at the user's body.
Igor Syrytsin +2 more
doaj +1 more source
A Non-Linear Correction Method for Terahertz LFMCW Radar
IEEE Access, 2020 The nonlinearity in terahertz (THz) linear frequency modulated continuous wave (LFMCW) radar usually blurs the range profile and decreases the signal to noise ratio, hampering applications where high range-resolution is particularly emphasized.
Yade Li +5 more
doaj +1 more source
Wide-Band and Wide-Angle Scanning Phased Array Antenna for Mobile Communication System
IEEE Open Journal of Antennas and Propagation, 2021 A wide-band phased array antenna with wide-angle scanning capability for mobile communication system is proposed in this article. An air cavity is properly embedded into the substrate under each array element.
Guangwei Yang, Yiming Zhang, Shuai Zhang
doaj +1 more source
Millimeter-wave diode-grid phase shifters [PDF]
, 1988 Monolithic diode grids have been fabricated on 2-cm square gallium-arsenide wafers with 1600 Schottky-barrier varactor diodes. Shorted diodes are detected with a liquid-crystal technique, and the bad diodes are removed with an ultrasonic probe.
Chen, Howard Z. +5 more
core +1 more source
Millimeter wave carbon nanotube gas sensor [PDF]
, 2007 This Letter reports experimental observations regarding the significant changes in the transmission modulus and phase of the propagating microwave signals up to 110 GHz in a micromachined coplanar waveguide supported on a dielectric membrane with a ...
Bary, Laurent +6 more
core +3 more sources