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MICROWAVE RECEIVER [10 records]

Record 1 2017-03-21

English

Subject field(s)
  • Advanced Technology Weapons
  • Radio Waves
  • Electronic Warfare
DEF

A type of DEW [directed-energy weapon] that uses RF [radio-frequency] energy to upset or damage the electronics of a target.

CONT

RF weapons are usually divided into two categories: high power microwave (HPM) weapons and ultrawideband (UWB) (or video pulse) weapons.

CONT

The primary distinction between RF weapons and more conventional EW systems is that RF weapons actually affect the electronics and not just the electronic environment, thereby causing temporary or permanent electronics failure that persists even after the RF beam has been turned off. RF weapons will mainly target receiver systems with in-band HPM [high-power microwave] radiation or computer systems with ultrawideband impulses.

CONT

In a radio-frequency weapon, electromagnetic radiation at wavelengths similar to that of radar is aimed at a target by means of an antenna. The principal effect would be to damage or destroy the electronic circuits of a missile.

Key term(s)
  • radio frequency weapon

French

Domaine(s)
  • Armes de haute technicité
  • Ondes radioélectriques
  • Guerre électronique
Key term(s)
  • arme à radiofréquence
  • arme à radio-fréquence
  • arme à fréquence radioélectrique
  • arme à fréquences radio-électriques

Spanish

Save record 1

Record 2 2016-03-07

English

Subject field(s)
  • Telecommunications Facilities
  • Radio Transmission and Reception
DEF

A tall metallic structure used as a support for one or more microwave antennas. The associated transmitter and receiver microwave equipment and their power supplies are housed in bays inside a small building located near the tower.

French

Domaine(s)
  • Installations de télécommunications
  • Émission et réception radio
DEF

Structure métallique verticale, qui permet de supporter des antennes de faisceaux hertziens, constituée généralement de pièces tubulaires assemblées entre elles par des boulons à haute résistance.

Spanish

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Record 3 2012-01-04

English

Subject field(s)
  • Radio Transmission and Reception
  • Radar, Radio Guidance and Goniometry
  • Radio Waves
DEF

In communications, a direct propagation path that does not go below the radio horizon.

OBS

Characteristic of some open-air transmission technologies where the area between a transmitter and a receiver must be clear and unobstructed. Said of microwave, infrared, and open-air, laser-type transmissions.

French

Domaine(s)
  • Émission et réception radio
  • Radar, radioguidage et radiogoniométrie
  • Ondes radioélectriques
DEF

État d'une onde radioélectrique qui se propage entre les antennes d'émission et de réception sur un rayon rectiligne.

OBS

en visibilité directe : locution servant à qualifier les moyens qui fonctionnent avec de telles ondes.

Spanish

Campo(s) temático(s)
  • Radiotransmisión y radiorrecepción
  • Guía radárica, radioguía y radiogoniometría
  • Ondas radioeléctricas
OBS

Característica de algunas técnicas de transmisión en el espacio libre que requieren una ruta despejada entre el transmisor y el receptor, como en transmisiones por microondas, enlaces ópticos o por infrarrojos.

Save record 3

Record 4 2011-05-31

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Lasers and Masers
  • Remote Sensing
DEF

An instrument combining a pulsed laser transmitter and optical receiver(usually a telescope) with an electronic signal processing unit used for the detection and ranging of various distant targets in the atmosphere, analogous to the principles of operation of microwave radar.

CONT

The lidar technique operates on the same principle as radar; in fact, it is sometimes called laser radar. The principal difference between lidar and radar is the wavelength of the radiation used. Radar uses wavelengths in the radio band whereas lidar uses light, that is usually generated by lasers in modern lidar systems.

CONT

There are three basic generic types of lidar: range finders, DIAL, and Doppler lidars. Rande finder lidars are the simplest lidars. They are used to measure the distance from the lidar instrument to a solid or hard target Differential Absorption Lidar (DIAL) is used to measure chemical concentrations (such as ozone, water vapor, pollutants) in the atmosphere. Doppler lidar is used to measure the velocity of a target High-resolution DEMs with vertical accuracy as good as 10 cm can be created with Lidar. Lidar is also better able to map bare earth elevations in forested or vegetated areas than other methods because only a single laser pulse needs to be able to reach between trees and the ground.

OBS

lidar: Coined word for light detection and ranging.

Key term(s)
  • laser-radar

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Masers et lasers
  • Télédétection
DEF

Combinaison d'un laser et d'un récepteur accolés, destinée à étudier les échos produits par les particules de l'atmosphère sur des ondes visibles ou infrarouges.

OBS

La détection se fait par des cellules optiques suivies de photomultiplicateurs.

OBS

Le lidar sert également à la localisation et à la poursuite télémétrique d'engins dans le ciel.

OBS

lidar : acronyme dérivé du terme anglais «light detection and ranging» qui veut dire «détection et télémétrie par ondes lumineuses».

Key term(s)
  • radar laser
  • laser-radar
  • laser radar

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Láser y máser
  • Teledetección
DEF

Aparato de detección y localización por ondas luminosas.

Save record 4

Record 5 2008-09-30

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Telecommunications Transmission
CONT

A satellite is a wireless receiver/transmitter that operates in orbit around the earth and acts as a microwave relay station, receiving signals sent from a ground-based station, amplifying them, and retransmitting them on a different frequency to another groundbased station.

OBS

radio relay; RR: term and abbreviation officially approved by the Department of National Defence and the Canadian Forces.

Key term(s)
  • radio relay station

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Transmission (Télécommunications)
DEF

Station réémettrice assurant le relayage d'un faisceau hertzien lorsque l'antenne de réception n'est pas en visibilité directe de l'antenne d'émission.

OBS

Dans le cas le plus fréquent d'un relais hertzien au sol, celui-ci comprend essentiellement un pylône ou une tour portant deux ou plusieurs antennes paraboliques et abritant les appareils de réception et réémission des signaux.

OBS

Peut être constitué par un satellite de télécommunications.

Key term(s)
  • station-relais

Spanish

Save record 5

Record 6 2003-03-17

English

Subject field(s)
  • Control Systems (Electronic Instrumentation)
  • Space Centres
CONT

The three onboard microwave scan beam landing systems are airborne Ku-band receiver/transmitter navigation and landing aids with decoding and computational capabilities. The MSBLS [Microwave Scan Beam Landing System] units determine slant range, azimuth and elevation to the ground stations alongside the landing runway. MSBLS is used during terminal area energy management, the approach and landing flight phases and return-to-launch-site aborts.

French

Domaine(s)
  • Systèmes cybernétiques de contrôle et de commande
  • Centres spatiaux

Spanish

Save record 6

Record 7 2002-12-04

English

Subject field(s)
  • Scientific Instruments
  • Remote Sensing
CONT

Instruments carried by the GFO-2 spacecraft include a two-frequency solid state altimeter, a two-frequency microwave radiometer, a 20-channel encrypted GPS receiver, and a laser retroreflector.

French

Domaine(s)
  • Instruments scientifiques
  • Télédétection
CONT

Cet altimètre européen, [...] l'altimètre à l'état solide (c'est à dire dont les ondes sont créés mécaniquement et non électroniquement, comme celles de TOPEX [expérience de topographie des océans]), utilise la même antenne que TOPEX.

Spanish

Save record 7

Record 8 1994-04-13

English

Subject field(s)
  • Security Devices
  • Corporate Security
  • Protection of Property
  • Protection of Life
CONT

Invisible barrier detectors generate an invisible beam of energy and are intended to detec intruders running, walking, or crawling through the beam. The barrier is formed by a transmitter emitting a beam of either microwave or infrared energy. A corresponding receiver, located in the line of sight of the transmitter at the opposite end of the beam, receives and monitors the transmitted signal for changes characteristics of someone penetrating the beam.

French

Domaine(s)
  • Dispositifs de sécurité
  • Sécurité générale de l'entreprise
  • Sécurité des biens
  • Sécurité des personnes

Spanish

Save record 8

Record 9 1993-02-08

English

Subject field(s)
  • Corporate Security
  • Security Devices
CONT

Active motion detectors fill the volume in range of the detector with either ultrasonic, microwave, or sonic energy. The transmitted energy forms a standing wave pattern as it reflects from the objects and walls in the room. Some of this energy is reflected back to the detector receiver, where it is received and processed. When there is a disturbance in the received signal due to someone moving within the protected area, the processor initiates an alarm.

OBS

Active detection system: a ... system which emits energy as a means of detection.

French

Domaine(s)
  • Sécurité générale de l'entreprise
  • Dispositifs de sécurité

Spanish

Save record 9

Record 10 1987-01-19

English

Subject field(s)
  • Aeroindustry
  • Measuring Instruments
  • Lasers and Masers
CONT

The laser(or lidar) velocimeter [lidar=light radar] operates in a fashion entirely analogous to that of the airborne Doppler weather radars likely soon to be available for detecting turbulence in storm cells. As with radars, the device detects air movements by observing the motion of particles suspended in the air and carried with it. The only significant difference is that a beam of coherent infrared radiation is used to scan ahead of the aircraft, instead of a beam(or series of pulses) of radio energy in the considerably longer-wavelength microwave band. The frequency of the back-scattered echoes or reflections undergoes Doppler shift detection by standard heterodyning techniques, which involve comparing the frequency of the reflected illumination with that of the original laser beam. Any reflecting object or material which has motion relative to the transmitter/receiver will cause a detectable shift in frequency, which can be isolated from the transmitter's own proper motion(over the ground) and thus yield a precise indication of the speed at which the air is moving several hundred metres in front of the aircraft. From this data, it is easy to compute what the air speed of the aircraft will be when it reaches that particular patch of air in a few seconds’ time [and hence detect possible turbulence ahead].

French

Domaine(s)
  • Constructions aéronautiques
  • Appareils de mesure
  • Masers et lasers
CONT

Le principe de fonctionnement du vélocimètre à laser (ou lidar) est exactement le même que celui des radars météorologiques Doppler de bord, qui doivent être mis en service prochainement pour la détection des turbulences dans les systèmes d'orages.

Spanish

Save record 10

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