Government agencies divide the radio frequency spectrum into frequency bands that are authorized for specific uses defined geographic regions (such as a city). In the United States, the responsibility ...

GSM radio systems operate in a specific frequency band (or frequency bands) that has been allocated to the system. The radio frequency channel that the system operators may be reused at different cell ...

and as a result they can also be used for things like this incredibly accurate frequency reference. This project is what’s known as a GPSDO, or GPS-disciplined oscillator. Typically they use a ...

This review introduces the innovative application of radio frequency (RF) treatment in fluid and semifluid foods, and it is ...

David Rutledge, California Institute of Technology 'Tom Lee's love of, and deep involvement in, radio-frequency integrated circuits is ... for the new generation of RF engineers … and is a valuable ...

which is ham-speak for radio frequency interference caused by man-made sources. Indiscriminate, often broadband in nature, and annoying as hell, QRM spews forth from all kinds of sources ...