Results 11 to 20 of about 836 (216)
Compact Multilayer Yagi-Uda Based Antenna for IoT/5G Sensors
Sensors, 2018 To increase the capacity and performance of communication systems, the new generation of mobile communications (5G) will use frequency bands in the mmWave region, where new challenges arise. These challenges can be partially overcome by using higher gain
Amélia Ramos +2 more
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Experimental Evaluation of the Shadowing of a Planar Antenna Caused by a Quadcopter Frame
Electrical, Control and Communication Engineering, 2020 The use of mobile data transfer can significantly increase the range of the remote-controlled operation of multirotor aerial vehicles. The planar antennas of ready-to-use 3G/LTE cellular communication dongles provide a low-cost and lightweight ...
Heydarov Ibrahim, Brodnevs Deniss
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IEEE Access, 2022 Metamaterials (MTMs) are artificially engineered materials with unique electromagnetic properties not occurring in natural materials. MTMs have gained considerable attention owing to their exotic electromagnetic characteristics such as negative ...
Bashar A. F. Esmail +2 more
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Three-Mode Vortex Wave Generator with Double-Layer Patch Antennas
International Journal of Antennas and Propagation, 2019 With the development of Multiple-Input Multiple-Output technologies, researches on radio vortex wave with orbital angular momentum have become active. At the same time, generators of miniaturized planar antennas have become very interesting.
Jun Hu +4 more
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Antenna Designs for CubeSats: A Review
IEEE Access, 2021 Cube Satellites, aka CubeSats, are a class of nano satellites that have gained popularity recently, especially for those that consider CubeSats as an emerging alternative to conventional satellites for space programs.
Suhila Abulgasem +5 more
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Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag
International Journal of Antennas and Propagation, 2019 Planar UHF RFID antimetal tag can be widely used for the metallic products or packages with metal material inside. A double loop inductive feed planar patch antenna is proposed for UHF RFID tag mounted on metallic objects.
Lingfei Mo, Chenyang Li
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A compact multiband planar antenna using modified L-shape resonator slots
Heliyon, 2020 A multiband planar antenna designed and proposed with resonator slots is presented. The proposed antenna consists of a planar hexagonal patch composed of two pairs of resonator slots.
Indu Jiji Rajmohan, Mousa I. Hussein
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An Ultra-Wideband Ridged Biconical Multibeam Antenna
IEEE Access, 2023 This paper presents an ultra-wideband multibeam antenna with eight radiating elements that are connected to the central cylindrical part. Each radiating element consists of a TEM horn fed by a coaxial to ridged planar waveguide transition. The connection
Mahdi Zoghi +2 more
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Application of metasurfaces in the design of performance-enhanced low-profile antennas
EPJ Applied Metamaterials, 2018 This paper presents a review of metasurface-based antennas conducted at the Microwave Communication Laboratory (MCL) of Ajou University in the Republic of Korea.
Park Ikmo
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Acute caffeine treatment protects the developing retina from ischemia‐induced cell death
FEBS Open Bio, EarlyView.Caffeine reduces cell death in the developing retina under ischemia (OGD). This effect does not involve BDNF upregulation or antioxidant pathways (NRF2/VEGF). Neuroprotection occurs mainly through adenosine A2A receptor antagonism, decreasing glutamate release and excitotoxicity, highlighting caffeine's potential as an acute neuroprotective agent in ...
Amanda Alves Nascimento +6 more
wiley +1 more source