Results 31 to 40 of about 333,895 (294)
, 2020 [[abstract]]A temperature-insensitive (-25 degrees C-175 degrees C) monolithic concurrent multiband low-noise amplifier (LNA) for 1.8/1.9-GHz GSM, 2.4/4.9/5.2/5.7-GHz WLAN, and 5-7-GHz ultra-wideband (UWB) system applications is realized using a low-cost
Lin, YS, 林佑昇
core +1 more source
Dianxin kexue4.9 GHz作为中国移动特色频率，如何合理规划、有效满足通信和感知等业务需求至关重要。聚焦中国移动4.9 GHz频率使用策略，首先，结合低空通信、感知、地面通信业务现状，分析典型业务需求情况；其次，详细研究通信与通信、感知与感知、通信与感知间干扰，给出低空通信、感知、地面通信频段使用策略建议；最后制定4.9 GHz网络部署建议，为后续移动通信业务有序承载、科学管理运营提供支撑。
张琪璇 +6 more
doaj +4 more sources
Известия высших учебных заведений России: Радиоэлектроника, 2023 Introduction. One of the directions in Fabry–Perot antenna design consists in increasing its operation frequency range. In the present work, we set out to develop a Fabry–Perot antenna with a smooth gain pattern across a wide frequency range. To that end,
A. M. Sosunov +4 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Progressive brain atrophy has now been widely observed in the chronic stages of moderate–severe traumatic brain injury (msTBI), but there is only coarse information regarding its prevalence and magnitude, and whether rate of atrophy accelerates or attenuates across time. We examined these questions in a Canadian inception cohort from
Robin E. A. Green +6 more
wiley +1 more source
Electronically tuned 23 GHz Gunn oscillators for a microwave datalink [PDF]
, 1988 Includes bibliographical references.A market has been identified for 23 GHz, short-haul, low-capacity, digital radio. The dissertation presents the development of the varactor controlled Gunn oscillators that constitute the crystal locked microwave ...
Kratzenstein, L
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Wideband Planar Antenna for New Generation Mobile Applications
International Journal of Antennas and Propagation, 2007 A wideband, compact planar monopole antenna having a 2 : 1 VSWR bandwidth of 98% (1.68 GHz–4.9 GHz) is presented. The omnidirectional radiation pattern with moderate gain and linear polarization in the entire band makes the antenna an excellent candidate
P. C. Bybi +3 more
doaj +1 more source
DC–35 GHz low-loss MMIC switch using 50 nm gate-length MHEMT technology for ultra-low-power applications [PDF]
, 2009 A broadband low-loss, ultra-low-power consumption transmit/ receive switch using high-performance 50 nm gate-length metamorphic high electron mobility transistors (MHEMTs) is presented.
Hwang, C.J. +15 more
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Arthritis Care &Research, EarlyView.Objective Systemic lupus erythematosus (SLE) significantly impacts employment capacity. This study aimed to investigate the impact of burden of disease activity, damage, and treatment on employment outcomes and transitions in patients with SLE. Methods Using data from a single center, we analyzed employment transitions, adjusted mean disease activity ...
Javier Mencia‐Ledo +4 more
wiley +1 more source
PLoS ONE, 2022 This paper presents the design of a triband antenna that can be electronically configured to operate at different frequencies. The proposed antenna is design to operate at sub-6GHz bands at 2.45 GHz (ISM, Wi-Fi, and WLAN), 3.3, 3.5 & 3.9 GHz (WiMAX), and
Musa Hussain +6 more
doaj +2 more sources
Advanced Materials Technologies, EarlyView.A THz metasurface device integrating a metal–dielectric–metal resonator with microwall‐defined recessed regions enables spatially guided, label‐free sensing of micrometer‐scale plastic particles. The as‐fabricated devices exhibit distinct THz reflection resonances for 3.1‐µm polystyrene particles and a concentration‐dependent resonance‐frequency‐shift ...
Naoki Inomata +2 more
wiley +1 more source