Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical...
15 KB (1,091 words) - 02:25, 15 April 2024
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists...
107 KB (12,430 words) - 03:26, 27 April 2024
radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range...
44 KB (2,909 words) - 06:53, 14 May 2024
Radio-frequency (RF) engineering is a subset of electrical engineering involving the application of transmission line, waveguide, antenna and electromagnetic...
8 KB (737 words) - 00:22, 9 April 2024
In radio-frequency engineering and communications engineering, waveguide is a hollow metal pipe used to carry radio waves. This type of waveguide is used...
34 KB (3,523 words) - 04:33, 5 December 2023
mechanical vibrations, audio signals (sound), radio waves, and light. For example, if a heart beats at a frequency of 120 times per minute (2 hertz), the period—the...
21 KB (2,288 words) - 15:55, 24 May 2024
Electromagnetic interference (redirect from Radio Frequency Interference)
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external...
37 KB (4,394 words) - 05:00, 6 November 2023
much radio spectrum is set aside for amateur radio transmissions. Individual amateur stations are free to use any frequency within authorized frequency ranges;...
51 KB (3,943 words) - 03:50, 28 May 2024
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the...
27 KB (3,039 words) - 07:41, 25 April 2024
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is...
16 KB (1,844 words) - 17:36, 10 May 2024