Results 11 to 20 of about 333,895 (294)
A Mini-survey of Ultracool Dwarfs at 4.9 GHz [PDF]
Astronomy & Astrophysics, 2008 Context. A selection of ultracool dwarfs are known to be radio active, with both gyrosynchrotron emission and the electron cyclotron maser instability being given as likely emission mechanisms. Aims.
J. G. Doyle +9 more
core +5 more sources
WiMAX performance at 4.9 GHz [PDF]
2010 IEEE Aerospace Conference, 2010 Worldwide Interoperability for Microwave Access (referred to as WiMAX) is a MAC and physical layer wireless communications technology for outdoor broadband wireless coverage.
Pressly, Will +7 more
core +2 more sources
Wandering spur suppression in a 4.9-GHz fractional-N frequency synthesizer [PDF]
IEEE Journal of Solid-State Circuits, 2022 Fractional-N frequency synthesizers that use a digital Δ-Σ modulator (DDSM) to control the feedback divider can exhibit spurious tones that move about in the frequency domain; these are known colloquially as ``walking'' or wandering spurs.
Tulisi, Stefano +19 more
core +4 more sources
A 4.9-GHz Low Power, Low Jitter, LC Phase Locked Loop [PDF]
Journal of Instrumentation, 2010 An LC phase locked loop ASIC, fabricated in a commercial 0.25-µm Silicon-on-Sapphire CMOS technology, has been characterized in lab. Random jitter and deterministic jitter are less than 2.5 ps and 10 ps, respectively.
T Liu, Liu, T
core +3 more sources
ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference (ESSCIRC), 2021 Apart from the well-known nonlinearity-induced fixed spurs, a DDSM divider-based fractional-N frequency synthesizer can manifest spurs with time-varying frequency offsets from the carrier; these are called wandering spurs.
James Breslin +19 more
core +3 more sources
Single-ended and balanced frequency doublers 2.45 to 4.9 GHz using GaN FETs [PDF]
2024 54th European Microwave Conference (EuMC)In this work, hybrid GaN-based single-ended and balanced active frequency doubler prototypes, from 2.45 to 4.9 GHz, have been designed. To minimize the balanced topology area, the Moore space-filling curve has been used in the design of the 180º hybrid ...
Tasker, Paul J. +9 more
core +3 more sources
A Wideband Beamforming Antenna Array for 802.11ac and 4.9 GHz in Modern Transportation Market [PDF]
IEEE Transactions on Vehicular Technology, 2020 In this work, a novel antenna structure has been proposed, which consists of multiple sub-array features i.e., a field selectable beam (90°, 180°, 270°, and 360°) and the choice of gain (11.16, 14.59 and 17.25 dBi) that can be easily adapted to cater for the dynamic scenarios in the transportation environment.
Moh Chuan Tan +3 more
openaire +2 more sources
On the Feasibility of 4.9 GHz Public Safety Band as Spectrum Option for Internet of Vehicles
2022 International Conference on Electronics, Information, and Communication (ICEIC), 2022 There is an unprecedented impetus on the advancement of internet of vehicles (IoV). The vehicle-to-everything (V2X) communication is well acknowledged as the key technology in constitution of the IoV. Nevertheless, the spectrum for V2X communication is undergoing a massive change in the United States: a majority of the bandwidth has been reallocated to
Muhammad Faizan Rizwan Khan, Seungmo Kim
openaire +3 more sources
Design of Dual-Band Microstrip Patch Antenna for Wireless Local Area Network Applications
Engineering Proceedings, 2023 This study focuses on the design of a dual-band microstrip patch antenna, which is capable of operating in two different frequency bands, specifically the 4.9 GHz and 6.7 GHz WLAN (Wireless Local Area Network) bands.
Muhammad Bilal Hussain +4 more
doaj +1 more source
High-performance integrated graphene electro-optic modulator at cryogenic temperature
Nanophotonics, 2020 High-performance integrated electro-optic modulators operating at low temperature are critical for optical interconnects in cryogenic applications. Existing integrated modulators, however, suffer from reduced modulation efficiency or bandwidth at low ...
Lee Brian S. +7 more
doaj +1 more source