X-Nico

unusual facts about Radio Frequency



Gregory Charvat

Charvat has authored or co-authored numerous journals, proceedings, magazine articles, and seminars on topics including applied electromagnetics, synthetic aperture radar (SAR), and phased array radar systems, radio frequency (RF) and analog design.

Overvoltage

Filters are used to prevent spikes entering or leaving the equipment through wires, and the devices coupled electromagnetically to space (such as radio-frequency pick-up coils in MRI scanners) are protected by shielding.

Telit

Its m2m module portfolio include products in GSM/GPRS, EDGE, UMTS, EV-DO, HSPA, LTE and CDMA products as well as short-range modules in Wi-Fi, ZigBee, Short Range RF (proprietary mesh and point-to-point networks for unlicensed frequency bands), Wireless MBus and GPS/GLONASS (Machine-to-Machine) modules.

TV-band device

TV band devices or TVBDs are new unlicensed radio frequency devices operating in the vacant channels or white spaces between US television channels in the range of 54 to 698 MHz.


see also

High voltage

High-voltage lightning discharges in the atmosphere of Jupiter are thought to be the source of the planet's powerful radio frequency emissions.

HIRF

The U.S. Food and Drug Administration (FDA), and U.S. Federal Communications Commission (FCC) set limits for the amounts of Radio Frequency Energy exposure permitted in a standard work-day.

Long Range Anti-Ship Missile

The LRASM is based on the AGM-158B JASSM-ER, but incorporates a multi-mode radio frequency sensor, a new weapon datalink and altimeter, and an uprated power system.

Mobile phone radiation and health

Australian research conducted in 2009 by subjecting in vitro samples of human spermatozoa to radio-frequency radiation at 1.8 GHz and specific absorption rates (SAR) of 0.4 to 27.5 W/kg showed a correlation between increasing SAR and decreased motility and vitality in sperm, increased oxidative stress and 8-Oxo-2'-deoxyguanosine markers, stimulating DNA base adduct formation and increased DNA fragmentation.

Radio Frequency Systems

RFS, Radio Frequency Systems, is a commercial company working in the field of wireless communication equipment (cable, Base station subsystem, diplexer and parabolic antenna).

RECCO

During the northern-hemisphere winter of 1978/1979 Magnus worked in conjunction with the Royal Institute of Technology in Stockholm, painstakingly conducting an experiment to measuring radio frequency penetration of snow.

Relativistic quantum mechanics

Lamb and Retherford experimentally measure stimulated radio-frequency transitions the 2S1/2 and 2P1/2 hydrogen levels by microwave radiation.

Smart tag

Smart label, a type of radio-frequency identification (RFID) transponder

SSETI Express Satellite

Other mission objectives include the acquisition of Earth images by a commercial off-the-shelf digital camera and the operation of a message transmission service using an amateur radio frequency.

TWT

Traveling-wave tube, a device used to amplify radio frequency signals to high power

Vanbrugh College

Between A and X Block a shed once used as cleaners cupboard is used by University Radio York which broadcast radio locally at the 1350AM Radio Frequency.