Results 1 to 10 of about 248,313 (294)
Quad-Band Rectenna for Ambient Radio Frequency (RF) Energy Harvesting [PDF]
Sensors, 2021 RF power is broadly available in both urban and semi-urban areas and thus exhibits as a promising candidate for ambient energy scavenging sources.
Sunanda Roy +5 more
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Optically and radio frequency (RF) transparent meta-glass [PDF]
Nanophotonics, 2020 We propose a radio frequency (RF) and visibly transparent composite metasurface design comprising newly developed transparent multilayer conductive coatings.
Safari Mahdi +4 more
doaj +2 more sources
Effects of radial radio-frequency field inhomogeneity on MAS solid-state NMR experiments [PDF]
Magnetic Resonance, 2021 Radio-frequency field inhomogeneity is one of the most common imperfections in NMR experiments. They can lead to imperfect flip angles of applied radio-frequency (rf) pulses or to a mismatch of resonance conditions, resulting in artefacts or degraded ...
K. Aebischer, Z. Tošner, M. Ernst
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Design of a Highly Efficient Wideband Multi-Frequency Ambient RF Energy Harvester
Sensors, 2022 For low input radio frequency (RF) power from −35 to 5 dBm, a novel quad-band RF energy harvester (RFEH) with an improved impedance matching network (IMN) is proposed to overcome the poor conversion efficiency and limited RF power range of the ambient ...
Sunanda Roy +5 more
doaj +1 more source
Photonics, 2020 Radio frequency (RF) blackout and attenuation have been observed during atmospheric reentry since the advent of space exploration. The effects range from severe attenuation to complete loss of communications and can last from 90 s to 10 min depending on ...
Bruce A. Webb, Richard W. Ziolkowski
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Study of RF Stray Currents in ITER Neutral Beam Test Facilities
Applied Sciences, 2021 The operation of SPIDER (Source for the Production of Ions of Deuterium Extracted from Radio-frequency plasma), full-scale prototype of ITER NBI (Neutral Beam Injector) radio-frequency ion source, pointed out deleterious effects caused by stray Radio ...
Riccardo Casagrande +4 more
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IEEE Access, 2020 In the engineering use of a magnetically coupled resonant radio energy transmission system, both the resonant frequency and the optimal load impedance will be varied because of the external conditions.
Zhihui Huang +3 more
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A SIMPLE METHOD FOR IMPROVING OUT-OF-BAND HIGH-FREQUENCY STABILITY OF RADIO FREQUENCY AMPLIFIERS [PDF]
Radio Physics and Radio Astronomy, 2023 Subject and Purpose. Methods for determining and ensuring the stability of radio frequency (RF) amplifiers have been progressing quite actively over the past decades. However, most of them are not convenient for practical use.
A. D. Khristenko
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Analisis Perbandingan Kinerja Sistem Radio Over Fiber Modulasi Optik Langsung dan Eksternal
Jurnal Elkomika, 2023 ABSTRAK Radio Over Fiber (ROF) adalah sistem komunikasi yang digunakan untuk mentransmisikan sinyal radio frequency (RF) melalui serat optik. Kapasitas dan mobilitas jaringan akses dapat ditingkatkan dengan memanfaatkan sistem ROF. Modulasi sinyal optik
FEBRIZAL UJANG, AINUL YAKIN
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A Comprehensive Experimental Emulation for OTFS Waveform RF-Impairments
Sensors, 2022 The orthogonal time-frequency space (OTFS) waveform exceeds the challenges that face orthogonal frequency division multiplexing (OFDM) in a high-mobility environment with high time-frequency dispersive channels.
Abdelrahman Abushattal +3 more
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