Efficient up-conversion of radio-frequency signals to an optical carrier would enable their transmission through optical fibres instead of through copper wires, drastically reducing losses, and would give access to the set of established quantum optical techniques that are routinely used in quantum-...
The terahertz (THz) spectral domain offers myriads of applications spanning chemical spectroscopy, medicine, security and imaging1. Terahertz waves are fascinating owing to their peculiar position in the electromagnetic spectrum, bridging microwaves and infrared light. Since metals do not suffer prohibitive...
Rossby waves are a type of global-scale wave that develops in planetary atmospheres, driven by the planet’s rotation1. They propagate westward owing to the Coriolis force, and their characterization enables more precise forecasting of weather on Earth2,3. Despite the massive reservoir of rotationa...
The sensitivity and specificity of RF sponge technology are much higher than published reports of surgical counts or published findings of intraoperative radiographs for retained sponges. 展开 关键词: Morbid obesity Operating room Radio waves Safety Safety management Surgical sponge ...
The physics behind radar systems encompasses two primary types of scattering: forward scattering and backscattering [41,76]. Forward scattering is detailed through a modern perspective, indicating that radar waves can scatter in the direction forward from their original path when the bistatic angle, th...
China sent two satellites for the detection of gravitational waves into planned orbit from Xichang Satellite Launch Center in southwest China's Sichuan Province on Thursday morning. The two satellites, with the Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM...
Detection of solar particle streams by high-frequency radio waves: Lusignan, B. B., Radioscience Laboratory, Stanford University, Journal of Geophysical Research, 68, 20, October 15, 1963, 16 pagesDetection of solar particle streams by high-frequency radio waves: Lusignan, B. B., Radioscien...
Kurth WS, Gurnett DA, Scarf FL, Poynter RL (1984) Detection of a radio emission at 3 kHz in the outer heliosphere. Nature 312:27–29. : 10.1038/312027a0 ADS View ArticleKurth, W. S., Gurnett, D. A., Scarf, F. L., and Poynter, R. L., Detection of a radio emission...
However, these approaches require equipment that is in close proximity to the surface (on the order of mm) and have limited spatial resolution. Ground penetrating radar (GPR) uses high-frequency radio waves to assess conditions by capturing the attenuation of reflected radar waves13. The emitted ...
Radio waves interact with the antenna (the parabolic reflector) where they are carried to a focus. At the focus the radio waves in free space are coupled to an antenna through a device called a feed, that probes the electric field of incoming radiation rotating counterclockwise (right-hand cir...