microwave

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microwave,

electromagnetic wave having a frequency range from 1,000 megahertz (MHz) to 300,000 MHz, corresponding to a wavelength range from 300 mm (about 12 in.) to 1 mm (about 0.04 in.). Like light waves, microwaves travel essentially in straight lines. They are used in radar, in communications links spanning moderate distances, and in other applications, such as microwave ovensmicrowave oven,
device that uses microwaves to rapidly cook food. The microwaves cause water molecules in the food to vibrate, producing heat, which is distributed through the food by induction. A special electron tube called a magnetron produces the microwaves.
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. The equipment used to generate, process, and transmit microwaves is in many respects different from that used with lower frequency radio waves. See waveguidewaveguide,
device that controls the propagation of an electromagnetic wave so that the wave is forced to follow a path defined by the physical structure of the guide. Waveguides, which are useful chiefly at microwave frequencies in such applications as connecting the output
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; magnetronmagnetron
, vacuum tube oscillator (see electron tube) that generates high-power electromagnetic signals in the microwave frequency range. Its operation is based on the combined action of a magnetic field applied externally and the electric field between its electrodes.
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.

microwave

[′mī·krə‚wāv]
(electromagnetism)
An electromagnetic wave which has a wavelength between about 0.3 and 30 centimeters, corresponding to frequencies of 1-100 gigahertz; however, there are no sharp boundaries distinguishing microwaves from infrared and radio waves.

microwave

a. electromagnetic radiation in the wavelength range 0.3 to 0.001 metres: used in radar, cooking, etc.
b. (as modifier): microwave generator

microwave

Meaning "small wave," a microwave is a radio signal in the frequency range from 300 MHz to 300 GHz or from 1 to 300 GHz, depending on the rating system. Except for AM and FM radio, shortwave radio and over-the-air TV, almost all other communications systems transmit microwaves, including satellites, cellular systems, wireless LANs and line-of-sight between buildings and across vast distances. See spectrum and millimeter wave.


Early Microwave Tower
Line-of-sight microwaves were first used to transmit across long distances where the terrain was too difficult to lay cable. This tower was installed in 1969 in Boulder Junction, Colorado. (Image courtesy of AT&T.)
References in periodicals archive ?
today announced enhancements to the N9000A CXA X-Series signal analyzer that broaden its use in RF and microwave applications.
In Nuremberg, Rohde & Schwarz will present its wide range of T&M equipment for microwave applications.
25, 2012 /PRNewswire/ -- KEMET Corporation (NYSE: KEM), a leading manufacturer of tantalum, ceramic, aluminum, film, paper and electrolytic capacitors, and Modelithics have partnered to provide highly accurate and scalable Global (TM) models of KEMET's CBR Series of capacitors, sizes 0201, 0402, 0603, and 0805, for RF and microwave applications.
He provides chapters on microwave applications, transmission lines, microwave components, solid- state devices, and microwave materials.
Combining more than two decades of operation with advanced technology, Anritsu's MTC Fab can manufacture circuits for microwave applications, multi-layer systems (MCM-D), thin film sensors, resistor networks, attenuator circuits, hybrid circuits, and power hybrids used in telecommunications, defense, automotive, civil aviation and space, biotechnology, medical, and calibration designs.
Cree is a leader in the development of GaN HEMT technology for RF and microwave applications," said Jim Milligan, Cree, director of RF.
Serval is the industry's only switch engine family to support MPLS/MPLS-TP LER and LSR and patented LTE-advanced-ready IEEE 1588v2, useable in both fiber and microwave applications.
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In 1994, he joined the University of Birmingham, UK, where he was involved with microwave applications of high temperature superconductors, EM modeling, and circuit optimization.
GenClad 280 is engineered for use in bonding dissimilar and hard to bond materials in multilayer PCB structures, particularly in high speed and microwave applications.
5 GHz synthetic instrument based on the PXI platform for military and commercial RF and microwave applications.

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