Radio spectrum Radio spectrum 1.25 Meters is an amateur radio band unique to ITU Region 2. It ranges from 222 to 225 MHz in the United States and from 220 to 225 MHz in the rest of Region 2. The 1.25 meter band is part of the VHF spectrum, and is primarily used for more local communications as opposed to bands lower in frequency. ...more on Wikipedia about "1.25 meters"
The 10 meter amateur radio band is the highest of the High Frequency or "HF" bands. It is a large band, stretching from 28.000 MHz to 29.700 MHz. ...more on Wikipedia about "10 meters"
2 Meters is a popular amateur radio band. It is so named because the wavelength of the radio waves is very close to 2 meters in length. It ranges in frequency from 144 to 148 MHz in the United States and Australia, and from 144 to 146 MHz in most other parts of the world. The 2 Meter band is part of the VHF spectrum, and is primarily used for local communications, within a range of about 100 miles. Because it is local and reliable, and because in many parts of the world, the licensing requirements to transmit on the 2 Meter band is easy to obtain, this band is one of the most popular non-HF ham bands. ...more on Wikipedia about "2 Meters"
33 Centimeters is an amateur radio band. It ranges from 902 to 928 MHz and is unique to ITU Region 2. The 33 centimeter band is part of the UHF spectrum, and is primarily used for very local communications as opposed to bands lower in frequency. ...more on Wikipedia about "33 centimeters"
4 metres is an Amateur Radio frequency band in the lower Very High Frequency spectrum. Traditionally only allocated in a small number of countries in Europe and Africa, the decline in VHF television broadcasts, movement away from the old Eastern European VHF FM broadcast band and migration of commercial stations to higher frequencies have led to slow but steady growth in the number of countries where 4 metre operation is permitted. ...more on Wikipedia about "4 metres"
The 40 meters or 7 MHz band is a core amateur radio frequency band, spanning 7000 to 7300 kilohertz, allocated to radio amateurs in all countries worldwide. One of the five original shortwave bands allocated to amateurs in 1926, 40 meters is considered the most reliable all-season DX band, most useful for inter-continental communication at night. It is extremely useful for short to medium distance contacts from local contacts out to a range of 500-1500 km, depending on conditions, during the day. In higher latitudes, daytime inter-continental communcation is also possible in winter, for example a good path often opens between Japan and northern Europe in the hours leading up to European midday from late November until late January, with a long path opening to the west coast of the United States and Canada after midday. ...more on Wikipedia about "40 meters"
6 Meters is a popular ham radio band. It ranges from 50 to 54 MHz in the United States. The 6 Meter band is part of the VHF spectrum but exhibits some of the HF propagation mechanisms and because of this peculiar behavior it is sometimes called Magic Band. The 6 Meter band is not as popular as 2 Meter band because of antenna size, legal issues, frequency and power restrictions. It is illegal to use in some countries because it is also a popular military communication band. In some nations, the frequency range occupied by the six-meter ham band is used for television transmissions, although most countries have moved the channels to higher frequencies (see channel 1). ...more on Wikipedia about "6 meters"
In broadcasting, 80 meters is a shortwave radio band used by ham radio operators. The band spans frequencies from 3.5 to 4.0 Mhz, at most, although only a small number of countries permit amateurs access to the whole 500 kHz. ...more on Wikipedia about "80 meters radio band"
C band ("compromise" band) is a portion of electromagnetic spectrum in the microwave range of frequencies ranging from 4 to 6 GHz. (For military use, by NATO designation, "C band" is the frequency range between 0.5 and 1 GHz.) ...more on Wikipedia about "C band"
Extremely high frequency is the highest radio frequency band. EHF runs the range of frequencies from 30 to 300 gigahertz, above which electromagnetic radiation is considered to be low (or far) infrared light. This band has a wavelength of one to ten millimetres, giving it the name millimeter band. ...more on Wikipedia about "Extremely high frequency"
Extremely low frequency (ELF) is the band of radio frequencies from 3 to 300 Hz. ...more on Wikipedia about "Extremely low frequency"
High frequency (HF) radio frequencies are between 3 and 30 MHz. This range is often called shortwave. ...more on Wikipedia about "High frequency"
The industrial, scientific and medical (ISM) radio bands were originally reserved internationally for non-commercial use of RF electromagnetic fields for industrial, scientific and medical purposes. ...more on Wikipedia about "ISM band"
K band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging between 12 and 93 GHz. K band between 18 and 26.5 GHz is absorbed easily by water vapor (H2O resonance peak at 22.24 GHz, 1.35 cm). ...more on Wikipedia about "K band"
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The Ka band (kurz-above band) is a portion of the K band of the microwave band of the electromagnetic spectrum. Ka band roughly ranges from 18 to 40 GHz. The 20/30 GHz band is used in communications satellites, downlink 18.3–18.8 GHz and 19.7–20.2 GHz. The term “Ka band” is frequently used to refer to the recommended operating frequencies of WR-28 rectangular waveguide, which is 26.5 to 40.0 GHz. ...more on Wikipedia about "Ka band"
The Ku band ("kay-yoo" kurz-under band) is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 12 to 18 GHz. ...more on Wikipedia about "Ku band"
L band (20- cm radar long-band) is a portion of the microwave band of the electromagnetic spectrum ranging roughly from 0.39 to 1.55 GHz. It is used by some communications satellites, and by terrestrial Eureka 147 digital audio broadcasting (DAB). In the United States, the L band is held by the military for telemetry, thereby forcing digital radio to in-band on-channel (IBOC) solutions. DAB is typically done in the 1452–1492- MHz range as in Canada, but other countries also use VHF and UHF bands. The Global Positioning System carriers are in the L band, centered at 1176.45 MHz (L5), 1227.60 MHz (L2), 1381.05 MHz (L3), and 1575.42 MHz (L1) frequencies. WorldSpace satellite radio broadcasts in the 1467–1492 MHz L sub-band. Mobile phones operate at frequencies between 800 and 1900 MHz. The different NATO L band is defined as frequency band between 40–60 GHz (5–7.5 mm). ...more on Wikipedia about "L band"
(List of medium wave transmitters in Germany) ==See also== ...more on Wikipedia about "List of medium wave transmitters in Germany"
Long delayed echos (LDEs) are a special kind of radio wave echos, defined as radio echoes received 1 to 40 seconds after transmission, and occurring sometimes in the shortwave range. These echos were first observed in 1927. ...more on Wikipedia about "Long delayed echo"
:Longwave can also refer to the economics concept of Kondratiev waves, also called cycles, surges, or K-waves, or to the rock band Longwave. ...more on Wikipedia about "Longwave"
Low Frequency or LF (sometimes called longwave) refers to Radio Frequencies (RF) in the range of 30–300 kHz. In Europe, part of the LF spectrum is used for AM broadcast service. In the western hemisphere, its main use is for aircraft beacon, navigation ( LORAN), information, and weather systems. Time signal stations MSF, DCF77, JJY and WWVB are found in this band. ...more on Wikipedia about "Low frequency"
Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. In most of the world, mediumwave serves as the most common band for broadcasting. The standard AM broadcast band is 525 kHz to 1715 kHz in North America, but remains only up to 1615 kHz elsewhere. ...more on Wikipedia about "Mediumwave"
Microwaves are electromagnetic waves with wavelengths longer than those of infrared light, but shorter than those of radio waves. ...more on Wikipedia about "Microwave"
Modulated continuous wave is defined by the Federal Communications Commission in 47 CFR §97.3(c)(4) as "Tone-modulated international Morse code telegraphy emissions having designators with A, C, D, F, G, H or R as the first symbol; 2 as the second symbol; A or B as the third symbol." ...more on Wikipedia about "Modulated continuous wave"
Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. Such frequencies account for the following parts of the spectrum shown in the table below. ...more on Wikipedia about "Radio frequency"
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