Radio frequency techniques encompass experimental and analytical methods that generate, manipulate, and detect electromagnetic fields in the radio frequency (RF) range, typically from kHz to tens of GHz, for probing, controlling, or characterizing physical, chemical, or biological systems. These techniques include RF spectroscopy, RF reflectometry, impedance and network analysis, RF trapping and manipulation of charged particles or spins, and RF-based imaging or sensing modalities. They rely on precisely engineered transmission lines, resonators, antennas, and matching networks to control field distributions, optimize signal-to-noise ratios, and extract quantitative parameters such as permittivity, conductivity, relaxation times, or device response functions under well-defined RF excitation conditions.
A pocket-size gizmo that puts the "pop" in microwave popcorn could soon fuel particle accelerators of the future.
General Physics
Aug 5, 2024
0
101
A research team from the Department of Functional Composites in Composites Research Division at Korea Institute of Materials Science (KIMS) has successfully developed electromagnetic wave absorbers based on metal-organic ...
Condensed Matter
May 14, 2024
0
128
In the 1880s Heinrich Hertz discovered that a spark jumping between two pieces of metal emits a flash of light—rapidly oscillating electromagnetic waves—which can be picked up by an antenna. To honor his groundbreaking work, ...
Optics & Photonics
May 8, 2024
0
233
Electromagnetic waves in the terahertz frequency range offer many advantages for communications and advanced applications in scanning and imaging, but realizing their potential poses challenges. Researchers at Tohoku University ...
Optics & Photonics
Mar 11, 2024
0
196
Imagine tiny magnets powering our world, silently switching energy on and off in phones, cars, and even power grids. These unsung heroes are called soft magnetic materials. However, as devices become faster and more efficient, ...
Condensed Matter
Mar 5, 2024
0
236
Scientists from Australia and the United States have found a new way to alter the DNA of bacterial cells—a process used to make many vital medicines including insulin—much more efficiently than standard industry techniques.
Bio & Medicine
Feb 29, 2024
2
186
The electron is the basic unit of electricity, as it carries a single negative charge. This is what we're taught in high school physics, and it is overwhelmingly the case in most materials in nature.
Quantum Physics
Feb 21, 2024
9
4581
One of the most important components of satellites that enable telecommunication is the waveguide, which is a metal tube for guiding radio waves. It is also one of the heaviest payloads satellites carry into orbit. As with ...
Nanomaterials
Feb 7, 2024
0
199
Radar altimeters are the sole indicators of altitude above a terrain. Spectrally adjacent 5G cellular bands pose significant risks of jamming altimeters and impacting flight landing and takeoff. As wireless technology expands ...
Optics & Photonics
Jan 16, 2024
0
198
The search for and development of efficient terahertz (THz) sources is one of the major scientific goals of the 21st century. The THz region of the electromagnetic spectrum is composed of light frequencies in between the ...
Optics & Photonics
Dec 21, 2023
0
139
