| 1. | Electromagnetism and Radar - ONERA / DEMR |
| | The DEMR's strategic areas are : electromagnetic modeling, radar systems, signal processing and electronic warfare, radar imaging, antennae, radioelectrical propagation, low frequency radars ,... |
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| 2. | No Slide Title |
| | Why Antennas for Optics ? ? ?... An antenna is an intermediate resonator between local fields and far-field radiation... Single photon emitter couples to antenna mode photons object plasmon... Object Exciton Antenna Plasmon Radiation Photon... Antenna resonances : shape, size, metal matters... Nanopositioning Quantum Dots to the antenna... |
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| 3. | RiadHaidar |
| | MIM antenna Vertical MIM · total funneling in few % aperture ratio · perfect absorption in ² / 500 reducing the detection volume · Optimization of Idark · Optimization of speed... MIM antenna Vertical MIM : funneling mechanism engineering of the evanescent fields... Basic architectures Plasmonics on chip MIM antenna Vertical MIM : technological process w=150nm, h=2000nm, d=2500nm high aspect ratio nanometric metallic gratings... |
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| 4. | Radar imagery - Two SAR surveys in Sweden for Sethi |
| | A radar technique for imagery that uses the displacement of the radar antenna in order to obtain an angular resolution much greater than that of an static antenna.... As the antenna moves, the same point is illuminated several times : we obtain a series of data for each point under the radar.... By combining the variation of amplitude and phase of these returns, the aperture synthesis processing yields images of the zones observed as if we were using a wide, very high resolution antenna.... |
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| 5. | News Releases - December 2006 - Onera |
| | A fifty meter high antenna in the form of a cross equipped with 121 microphones was deployed in order to record the signals exploited in the band between 200 Hz and 4,000 Hz. The Germans from the DLR in Berlin deployed a smaller antenna to record signals in the higher band up to 10 kHz.... A fifty meter high antenna equipped with 121 microphones for locating the noise sources of aircraft... |
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| 6. | GRAVES Space Surveillance System - ONERA's Science Pictures |
| | GRAVES Space Surveillance System : the receiving antennas. (DCPS)... Transmitting antennas emit a continuous low-frequency signal towards a given angular section of space.... The receiving site, located nearly 400 kilometers away, houses a large number of omnidirectional antennas.... Based on the elementary signals picked up by these antennas, a narrow-lobe beam is produced.... |
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| 7. | ONERA - Electromagnetism and Radar (DEMR) - References |
| | Rias, the first low frequency antenna and synthetic pulse radar... |
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| 8. | SAR Radar Image - ONERA's Science Pictures |
| | The spatial resolution of a radar antenna is inversely proportional to its size.... The SAR (Synthetic Aperture Radar) technology makes use of the movement of the antenna to create a longer " synthetic " antenna, having therefore a higher spatial resolution than the one associated with same fixed antenna.... |
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| 9. | Transhorizon Radar NOSTRADAMUS - ONERA's Science Pictures |
| | Transhorizon Antenna Array (Photograph :... The Nostradamus radar system is a set of 288 bi-cone antenna elements distributed over the arms of a three-branch star, with a buried infrastructure to shelter the transmission and reception electronics.... Whereas transhorizon radars usely require huge linear antenna networks to beam the signals, the special surface distribution of Nostradamus makes it possible to control the electronic beams both in azimuth (360 °) and elevation.... |
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| 10. | Electromagnetism (Index) |
| | Electromagnetism (Index)Array antenna of the NOSTRADAMUS transhorizon radar(AMIL3). |
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