Results 31 to 40 of about 1,083 (258)
Heterodyne mixing of millimetre electromagnetic waves and sub-THz sound in a semiconductor device [PDF]
Scientific Reports, 2016 AbstractWe demonstrate heterodyne mixing of a 94 GHz millimetre wave photonic signal, supplied by a Gunn diode oscillator, with coherent acoustic waves of frequency ~100 GHz, generated by pulsed laser excitation of a semiconductor surface. The mixing takes place in a millimetre wave Schottky diode and the intermediate frequency electrical signal is in ...
Sarah L. Heywood +9 more
openaire +2 more sources
Towards topological protection based millimeter wave devices [PDF]
Physical Review B, 2019 20 pages, 7 ...
Gentili G. G. +3 more
openaire +4 more sources
A Novel Meander Line Metamaterial Absorber Operating at 24 GHz and 28 GHz for the 5G Applications
Sensors, 2022 Fifth generation (5G) communication systems deploy a massive MIMO technique to enhance gain and spatial multiplexing in arrays of 16 to 128 antennas. In these arrays, it is critical to isolate the adjacent antennas to prevent unwanted interaction between
Syed Aftab Naqvi +5 more
doaj +1 more source
A Prototype of Automotive 77 GHz Radar
Известия высших учебных заведений России: Радиоэлектроника, 2021 Introduction. Automotive radars are the main tools for providing traffic safety. The development of such radars involve a number of technical difficulties due to the manufacture of high-precision extremely high-frequency (EHF) printed circuit boards.
O. I. Bureneva +5 more
doaj +1 more source
Solid state Ka-band pulse oscillator with frequency electronic switching
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2015 Transmitting devices for small radars in the millimetre wavelength range with high resolution on range and noise immunity. The work presents the results of research and development of compact pulse oscillators with digital frequency switching from pulse ...
V. P. Dvornichenko +3 more
doaj +1 more source
IEEE Access, 2021 Due to the rapid development of wireless communication technologies, the number of wireless users are radically increasing. Currently, ~23 billion wireless devices are connected to the internet, and these numbers are expected to increase manifolds in the
Arshad Karimbu Vallappil +4 more
doaj +1 more source
Improved Capacity and Fairness of Massive Machine Type Communications in Millimetre Wave 5G Network
Computers, 2018 In the Fifth Generation (5G) wireless standard, the Internet of Things (IoT) will interconnect billions of Machine Type Communications (MTC) devices. Fixed and mobile wearable devices and sensors are expected to contribute to the majority of IoT traffic.
Naser Al-Falahy, Omar Alani
doaj +1 more source
3D segmentation denoising technology of millimeter wave human body security imaging
Electronics LettersTo meet the demand of noise reduction in millimeter‐wave human body security imaging, this paper proposes a new method for 3D segmentation denoising in millimeter‐wave images.
Deyue An, Huakun Zhang, Hao Tu
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives We aimed to determine the frequency of subclinical optic nerve (ON) lesions using MRI, optical coherence tomography (OCT), and visual evoked potentials (VEP) in radiologically isolated syndrome (RIS), and to assess their diagnostic and prognostic significance.
Christine Lebrun‐Frenay +13 more
wiley +1 more source
Sensors, 2023 Providing energy from fusion and finding ways to scale up the fusion process to commercial proportions in an efficient, economical, and environmentally benign way is one of the grand challenges for engineering. Controlling the burning plasma in real-time
Bruno Gonçalves +21 more
doaj +1 more source