nonionizing electromagnetic radiation with a frequency range of 0.1 to 300 Ghz, corresponding to a wavelength of 1mm to 3 m.
Refers to the part of the radio spectrum above 500 Megahertz (short-wave length) used for point-to-point communications where line of sight communications is not possible or necessary. Microwaves do not follow the curvature of the earth and are not reflected by the ionosphere. They are greatly affected by obstacles.
Invisible radiation that is part of the elctromagnetic spectrum with wavelength ranging from about one millimeter to one meter. This type of radiation is used in heating foods with microwaves.
n.: Signal from a friendly micro.
A high-frequency electromagnetic radio wave, in the spectrum between infrared light and short-wave radio wavelengths.(Added: 12-Sep-1999 517 Hits Rating: 2.71 Votes: 7)
Line-of-sight radio transmission using super-high frequencies.
A very short electromagnetic wave in the range of 1 to 30 GHz. It has a wavelength less than one meter.
Loosely, an electromagnetic wave having a wavelength from 300 mm to 10 mm (1 GHz to 30 GHz). Microwaves exhibit many of the properties usually associated with light waves, such as being easily concentrated into a beam.
Any electromagnetic wave in the radio frequency spectrum above 890 megahertz.
A short (usually less than 30 cm) electrical wave.
Common usage of electromagnetic waves that refers to the frequency range of 700 MHz to 40 GHz in the electromagnetic spectrum.
FCC regulations define microwaves as frequencies above 900 MHz, but the technical boundary for "microwave" signals is 3000 MHz (3 GHz). Microwave frequencies are often used to link studios or dispatch sites to distant transmitters and/or receivers.
Circuitry that operates at frequencies between 3 GHz and 300 GHz. See RF.
The portion of the electromagnetic spectrum above about 760 megahertz. Many communication technologies employ microwave frequencies, including line-of-sight, open-air microwave transmission facilities and, increasingly, satellite communications.
An electromagnetic radio wave that has a very short frequency.
electromagnetic wave roughly in the range 0.01-1 m in wavelength (ordinary broadcasting utilizes waves in the 200-600 m range; the "short waves" used in long-distance communications are rarely shorter than 10 m).
1) Portion of the electromagnetic spectrum above about 760MHz. 2) Describing high-frequency transmission signals and equipment that employ microwave frequencies, including line-of-sight open-air microwave transmission and, increasingly, satellite communications.
Radio spectral region in the millimeter to centimeter wavelengths.
The frequency range from approximately 1 to 300 GHz, covering the frequency range suitable for satellite communications.
Radio frequency signals between 890 MHz and 20 GHz.
1. The portion of the radio frequency spectrum at or above 1000 mHz. 2. A terrestrially based transmission system that uses parabolic dishes separated by distances that allow line-of-sight communication.
electromagnetic radiation which has a longer wavelength (between 1 millimeter and 30 centimeter) than visible light. Microwaves can be used to study the Universe, communicate with satellites in Earth orbit, and cook popcorn.
Electromagnetic radiation with a wavelength of between 0.3 and 30 centimeters (between infrared and radio), corresponding to frequency of 1 to 100 gigahertz (GHz). Favored for radar because of its cloud-penetrating properties.
microwave radiation. Electromagnetic radiation with wavelength between 3 mm and 30 cm.
The term "microwave" refers to electromagnetic waves in the frequency range of about 2-40 GHz.
The region of the electromagnetic spectrum with wavelengths in the range of 2.5 x 10-6 meters to 10-4 meters. Microwave photons are between optical and radio in the electromagnetic spectrum.
Radio frequencies in the gigahertz range are often called microwave frequencies.
a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
kitchen appliance that cooks food by passing an electromagnetic wave through it; heat is produced by the absorption of microwave energy by the water molecules in the food
a form of electro-magnetic radiation
a form of energy that falls within the electromagnetic spectrum
a form of energy that travels in high frequency waves
an electromagnetic wave with a frequency and a wavelength that are intermediate between those of a radio wave and those of light
an electromagnetic wave with a very short wavelength, between
a really high frequency alternating waveform
A microwave is any electromagnetic radiation having a wavelength in the approximate range from one millimeter to one meter, the region between infrared and short-wave radio wavelengths.
an ultra short radio wave, used in telecommunications to transmit signals. Microwave towers have dish-shaped antennae to receive the signals and a transmitting unit to forward the signal to the next tower.
(communications usage) High-frequency radio waves used for point-to-point and omnidirectional communication of audio, data and video signals. Microwave frequencies require direct line-of-sight to operate; obstructions such as trees or building distort the signal.
Terrestrial microwave line between two radio transceivers using parabolic dish antennas pointed directly at each other - carrying bandwidths that include DS1, DS2, DS3, STS1, and OC1, with ranges up to 50 miles (depending on weather, antenna size, and power emitted).
Electromagnetic waves in radio frequencies above 890 MHz and below 20 GHz. They only travel in straight lines, and are used for communication between satellites.
Electromagnetic radiation having a wavelength of 1 to 300 mm (frequency between infrared and radio waves).
Usually referring to all radio frequencies above 2 GHz or so.
Electromagnetic wave, with wavelengths spacing ranging from approximately 1 meter to 1 millimeter, which are used extensively for line-of-sight communications and cooking.
High-frequency radio waves used for the transmission of audio, video or data. Requires a clear line of sight between transmitter and receiver.
high frequency radio waves used for point-to-point communication of audio, video, and data signals. They can be simplex (omnidirectional) or duplex. The microwave spectrum is generally above 2 GHz. Microwave transmission requires line of sight transmission between sending and receiving antennas.
Line-of-sight, point-to-point transmission of signals at high frequency. Many CATV systems receive some television signals from a distant antenna location with the antenna and the system connected by microwave relay.
A high-frequency electromagnetic radio wave, in the spectrum between infrared light and short-wave radio wavelengths.(Added: 12-Sep-1999 44 Hits Rating: 4.00 Votes: 1)
One definition refers to the portion of the electromagnetic spectrum that ranges between 300 MHz and 3000 GHz. The other definition is when referring to the transmission media where microwave links are used. Frequencies in microwave transmission are usually between 1 GHz and 12 GHz.
Part of electromagnetic spectrum that is longer than infrared but shorter than short-wave radio. It ranges from 1 GHz to 300 GHz, corresponding to wavelength from 30 cm to 1mm. It spans UHF, SHF, and EHF bands. However, the frequency range of microwave is not strictly defined in handbooks or standards. Microwave has been very long used in radar and satellite communications. But the most familiar application is in microwave oven. In cellular networks, microwave is used to link base stations to the mobile switching system. And due to its bandwidth potential, microwave is the choice for broadband wireless access technologies such as WiMAX. Also see electromagnetic and radio wave.
A portion of the radio spectrum having radio waves that are physically very short, ranging in length between about 30 cm and 0.3 cm and generally used to refer to frequencies above 2 GHz.
That portion of the electromagnetic spectrum lying between the far infrared and conventional radio frequency range. The microwave frequency range extends from 1 GHz to 300 GHz. Microwaves are usually used in point-to-point communications because they are easily concentrated into a beam.
Radio signals with wavelengths of 10cm or shorter; frequencies above 1GHz
Technically, the term describes any frequency above 1.0 GHz.
A catheter is placed within the bladder and positioned within the prostate, then the antenna emits microwaves. This procedure increases the passageway allowing for easier urination.
Radio frequencies between 1 - 30 GHz used for video transmission over medium/long distance.
A term loosely used to describe a range of frequencies between 1 and 40 GHz.
An electromagnetic wave with wavelength in the micron range.
Band of very short wavelength radio waves within the UHF, SHF and EHF bands.
The region of the electromagnetic spectrum in the wavelength range from 1 mm to beyond 1 m.
A wireless technology that uses the high frequency band of the radio spectrum to transmit analog and digital information. Microwave systems can have bandwidths up to 300 times greater than broadcast TV networks and several times greater than cable TV networks.
1) Radio transmission which uses very short wave lengths (i.e., ultra-high frequency waveforms); and 2) A microwave system is a broadband facility which provides line-of-site radio communications and which requires that repeater stations be placed approximately every 40 kilometers (25 miles) because of the curvature of the earth.
a type of electromagnetic radiation with wavelengths between infrared radiation and radio waves
Microwave signals propagate in straight lines and are not refracted or reflected by ionized regions in the upper atmosphere. Microwave beams do not readily diffract around barriers such as hills, mountains and large human-made structures. Some reduction in strength occurs when microwave energy passes through trees and frame houses. Radio-frequency energy at longer wavelengths is affected to a lesser degree by such obstacles. The microwave band is well suited for wireless transmission of signals having a larger bandwidth.
RF carrier waves with wavelengths of less than one metre and frequency above 300 MHz. Typically used to refer to frequencies above 1 GHz.
Electromagnetic radiation with frequencies higher that 1,000 MHz; highly directional signal used to transmit radio frequencies from point-to-point at a relatively low power level.
Electromagnetic waves that travel in a straight line and are used to and from satellites and for short distances (i.e., up to 30 miles).
Wireless transmission at very high frequency to deliver telecommunications services, including TV distribution, between two points. It is dependent on line of sight.
A high frequency form of radio transmission.
Electromagnetic radiation which has a long wavelength (between 1 mm and 30 cm). Microwaves can be used to study the Universe, communicate with satellites in orbit around Earth, and cook popcorn.
A type of radiation used in treatment for atrial fibrillation. The use of microwave energy cures atrial fibrillation in approximately 80 percent of patients.
A motion detector that uses high frequency radio waves to detect motion. Similar to an ultrasonic.
high-frequency energy which is converted into heat when it is absorbed by food; these energy waves are especially attracted to water, liquid, sugar, and fat in foods, and cook more quickly than most other methods.
Any electromagnetic wave of microwave frequency having a wavelength from 30cm to 1mm used in many areas of signal broadcast within television or aviation. Also commonly known and used in the domestic and commercial kitchen environment for rapid cooking.
Electromagnetic radiation having wavelengths ranging from 1 millimeter to 1 meter.
Electromagnetic radiation with wavelengths of a few centimeters. It falls between infrared and radio wavelengths on the electromagnetic spectrum. The radio wave beam can deliver electrical energy over long distances.
A transmission medium which uses transmitter and receives and transmits video/communication signals through space with no connection between the transmitter/receiver. A line of sight is required for this medium.
electromagnetic radiation with a wavelength of 30 centimeters to 1 millimeter. Mid Ultraviolet Light – electromagnetic waves with a wavelength of 300 to 350 nanometers.
Electromagnetic waves with a wavelength on the order of a few inches. Microwaves are longer than infrared radiation and shorter than radio waves.
Line-of-sight, point-to-point transmission of signals at that portion of the electromagnetic spectrum above one GHz in frequency.
The subset of the Electromagnetic Spectrum encompassing wavelengths between .03 and 30 centimeters, corresponding to frequencies of 1-100 gigahertz.
High-frequency radio waves used for point-to-point and omnidirectional communication of audio, data, and video signals. Microwave frequencies require direct line of sight to operate. Obstructions in the path usually distort or block the signal. Growth of fiber optic networks have tended to curtail the growth and use of microwave relays.
Line-of sight, point-to-point transmission of signals at high frequency. Microwaves are also used for data, voice, and indeed all types of information transmission. The growth of fiber optic networks have tended to curtail the growth and use of microwave relays.
The frequency range from approximately 1 to 30 GHz and above.
High capacity radio waves used for point-to-point and multi-directional communication of audio, data and video signals. Microwave frequencies require direct line of sight between sending and receiving station to operate.
Line-of sight, point-to-point transmission of high-frequency radio signals (about 1 GHz and above).
A signal in the generic frequency range from above 1 GHz to an upper end of perhaps 30 or 40 GHz. This is the frequency range where coaxial cabled TEM mode signal propagation is viable.
the region of the radio spectrum above 1 gigahertz (GHz)
A high-frequency transmission that can be used for television signals or computer data. Microwave transmissions are said to be line of sight, which means that they cannot pass through tall buildings or mountains.
Electromagnetic radiation having wavelengths between approximately 1 mm and 1 m (corresponding to 0.3- and 300-GHz frequency) bounded on the short-wavelength side by far infrared ( 1 mm) and on the long-wavelength side by very high frequency radio waves ( 1 m). Passive systems operating at these wavelengths are sometimes called passive microwave systems. Active systems operating at these wavelengths are called radar, although the definition of radar requires a capability to measure distance that is not always included in active microwave systems. The limits of the microwave region are not precisely fixed.
Light, or electromagnetic radiation, whose wavelength ranges from millimetres to almost one metre. The cosmic microwave background radiation emits strongly in microwaves.
(1) The portion of the electromagnetic spectrum ranging between 1GHz and 100GHz. (2) High-frequency transmission signals and equipment that employ microwave frequencies, including line-of-sight open-air microwave transmission and satellite communications.
Electromagnetic waves in the range 1 to 30 GHz. Microwave-based networks are an evolving technology gaining favor due to high bandwidth and relatively low cost.
High frequency radio waves such as audio, video and data signals transmitted over comparatively short electromagnetic waves, usually between 1 millimeter and 1 meter in wavelength. Microwave requires direct line-of-sight to operate; obstructions such as trees or buildings interfere with the signal.
Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) frequencies, but relatively short for radio waves. Microwaves have wavelengths approximately in the range of 30 cm (frequency = 1 GHz) to 1 mm (300 GHz). This range of wavelengths has led many to question the naming convention used for microwaves as the name suggests a micrometer wavelength.