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Qu'est-ce (qui) est Radar Absorbent Material - définition

RAM TECHNOLOGY

Iron ball paint; Radar Absorbant Material; Radar Absorbent Material; Radar-absorbing materials; Jaumann layer; Radar Absorbing Material; Radar absorbing material; Jaumann absorber; Radar absorbent material; Radar-absorbing material; Radar-absorbent; Radar-absorbent material

Radiation-absorbent material

Radiation-absorbent material, usually known as RAM, is a material which has been specially designed and shaped to absorb incident RF radiation (also known as non-ionising radiation), as effectively as possible, from as many incident directions as possible. The more effective the RAM, the lower the resulting level of reflected RF radiation.

https://en.wikipedia.org/wiki/Radiation-absorbent_material

radar

$Echo heights above ground<br /><math>H=\left (\sqrt{r^{2}+(k_{e}a_{e})^{2}+2rk_{e}a_{e}sin(\theta _{e})} \right )-k_{e}a_{e}+h_{a}</math> <br />Where : <br />  r : distance radar-target <br />ke : 4/3 <br />ae : Earth radius <br />θe : elevation angle above the radar horizon <br />ha : height of the feedhorn above ground$

OBJECT DETECTION SYSTEM BASED ON RADIO WAVES

Radio detection and ranging; Airport radar; Radars; RADAR; Radio detecting and ranging; Radar illumination; Radio Detection and Ranging; Radar Homing and Warning; Radar station; Coherent processing interval; Radar system; Microwave radar; Fill pulse; Radar equation; Centimetric radar; Coherent Processing Interval; Radar distance measurement; Radar communication; Air search radar; Radar systems; Remote Radar Head; Applications of radar; Palmer Scan; Radar signal processing; Derax; Radar antenna design

n. early-warning radar

radar

$Echo heights above ground<br /><math>H=\left (\sqrt{r^{2}+(k_{e}a_{e})^{2}+2rk_{e}a_{e}sin(\theta _{e})} \right )-k_{e}a_{e}+h_{a}</math> <br />Where : <br />  r : distance radar-target <br />ke : 4/3 <br />ae : Earth radius <br />θe : elevation angle above the radar horizon <br />ha : height of the feedhorn above ground$

OBJECT DETECTION SYSTEM BASED ON RADIO WAVES

Radio detection and ranging; Airport radar; Radars; RADAR; Radio detecting and ranging; Radar illumination; Radio Detection and Ranging; Radar Homing and Warning; Radar station; Coherent processing interval; Radar system; Microwave radar; Fill pulse; Radar equation; Centimetric radar; Coherent Processing Interval; Radar distance measurement; Radar communication; Air search radar; Radar systems; Remote Radar Head; Applications of radar; Palmer Scan; Radar signal processing; Derax; Radar antenna design

¦ noun a system for detecting the presence, direction, and speed of aircraft, ships, etc., by sending out pulses of radio waves which are reflected off the object back to the source.

Origin

1940s: from ra(dio) d(etection) a(nd) r(anging).

Wikipédia

Radiation-absorbent material

In materials science, radiation-absorbent material, usually known as RAM, is a material which has been specially designed and shaped to absorb incident RF radiation (also known as non-ionising radiation), as effectively as possible, from as many incident directions as possible. The more effective the RAM, the lower the resulting level of reflected RF radiation. Many measurements in electromagnetic compatibility (EMC) and antenna radiation patterns require that spurious signals arising from the test setup, including reflections, are negligible to avoid the risk of causing measurement errors and ambiguities.

https://en.wikipedia.org/wiki/Radiation-absorbent material