Microwave technology

Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations and terrain. The term RADAR was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term radar has since entered English and other languages as an anacronym, a common noun, losing all capitalization.

kitchen cooking appliance

thumb|A telecommunications tower with a variety of dish antennas for microwave relay links on [[Frazier Peak, Ventura County, California. The apertures of the dishes are covered by plastic sheets (radomes) to keep out moisture.]]

device for generating microwaves

300px|thumb|upright=1.7 |The first prototype ammonia maser in front of its inventor [[Charles H. Townes. The ammonia nozzle is at left in the box, the four brass rods at center are the quadrupole state selector, and the resonant cavity is at right. The 24 GHz microwaves exit through the vertical waveguide Townes is adjusting. At bottom are the vacuum pumps.]] thumb|right|260px|A hydrogen radio frequency discharge, the first element inside a #Hydrogen maser|hydrogen maser (see description below)

type of spacecraft propulsion that takes advantage of solar radiation

structure used to propagate electromagnetic waves

250px|thumb|right|400 kW klystron used for spacecraft communication at the Canberra Deep Space Communications Complex. This is a spare in storage. thumb|upright=2|5 kW klystron tube used as power amplifier in UHF television transmitter, 1952. When installed, the tube projects through holes in the center of the cavity resonators, with the sides of the cavities making contact with the metal rings on the tube.

form of diode

device used to amplify radio frequency signals in the microwave spectrum

technology of transmitting information or energy by the use of microwaves

a diode with a wide, undoped intrinsic semiconductor region between a p-type semiconductor and an n-type semiconductor region

the property that an increasing voltage results in a decreasing current

thumb|High-power 140 GHz gyrotron for plasma heating in the Wendelstein 7-X fusion experiment, Germany. A gyrotron is a class of high-power linear-beam vacuum tubes that generates millimeter-wave electromagnetic waves by the cyclotron resonance of electrons in a strong magnetic field. Output frequencies range from about 20 to 527 GHz, covering wavelengths from microwave to the edge of the terahertz gap. Typical output powers range from tens of kilowatts to 1–2 megawatts. Gyrotrons can be designed for pulsed or continuous operation. The gyrotron was invented by Soviet scientists at NIRFI, based

electronic component which reduces a signal's amplitude

set of multiple antennas which work together as a single antenna

field-effect transistor incorporating a heterojunction as the channel

thumb|right|200px|Cross-section of microstrip geometry. Conductor A is separated from ground plane D by dielectric substrate C. Upper dielectric B is typically air.

a type of integrated circuit (IC) device that operates at microwave frequencies

thumb|upright=1.6|MESFET schematic A MESFET (metal–semiconductor field-effect transistor) is a field-effect transistor semiconductor device similar to a JFET with a Schottky (metal–semiconductor) junction instead of a p–n junction for a gate.

radio technology devices

electric charge treated as continuously distributed in space

vacuum tube used to generate microwaves

type of electronic filter circuit

rectangular Microstrip Antenna is a radio antenna constructed from a single metal patch suspended over a ground plane

specialized vacuum tube used as a microwave amplifier

non-nuclear weapon that creates an electromagnetic pulse

type of bipolar junction transistor (BJT) which uses differing semiconductor materials for the emitter and base regions, creating a heterojunction

radiometer that measures energy in the one millimetre to meter wavelengths

Antenna used in wireless communication

antenna fabricated using photolithographic techniques

two-port device that transmits microwave or radio frequency power in one direction only

transmission line-based electrical circuit

type of radio-frequency coupler

whole-body imaging device

study and design of microwaves

electronic filter that is constructed with waveguide technology

microwave network module

radar system

transmission line with a flat, ribbon-shaped conductor

thumb|Tellurometer model M/RA-1 thumb|Tellurometer model MRB2

A vircator (VIRtual CAthode oscillaTOR) is a microwave generator that is capable of generating brief pulses of tunable, narrow band microwaves at very high power levels. Its application is mainly in the area of electronic warfare, by way of interfering with electronic equipment such as radars or radio equipment.

Magnetic device

type of radio-frequency coupler

type of planar transmission line

thumb|right|250px|Cross-section diagram of stripline geometry. Central Electrical conductor|conductor (A) is sandwiched between ground planes (B and D). Structure is supported by [[dielectric (C).]]

Television Broadcast Transmitter Power Amplifier

electronic instrument used to measure the frequency of radio waves

type of klystron for generating low intensity microwaves

RF signal splitter with special properties

synthetic rectangular electromagnetic waveguide

single wire transmission line used to conduct radio waves at UHF and microwave frequencies

thermotherapy by microwaves for cancer

resonator device that can hold a standing microwave