Multibeam satellite systems make it possible to reduce the size of earth stations and hence the cost of the earth segment. Frequency re-use from one beam to another permits an increase in capacity without increasing the bandwidth allocated to the system. With single beam antenna coverage, it is therefore …
Read More »The overarching goal of quantum information science and its enabled emerging quantum technologies is to demonstrate capabilities beyond what is allowed by their classical counterparts. Sensing is an arena that quantum technologies can achieve advantages over classical sensing technologies for practical applications in the near term. Quantum metrology studies the …
Read More »
The electromagnetic spectrum is a series of frequencies ranging from radio waves to microwaves, visible light, X-rays, and gamma rays. As the wavelength of the electromagnetic radiation shortens, the waves have a higher frequency—how quickly electromagnetic waves follow each other—and therefore more energy. Ultraviolet (UV) is electromagnetic radiation with …
Read More »
Today, we are witnessing the second quantum revolution, where quantum states, which can exhibit superposition and entanglement, are harnessed for quantum technological applications. Quantum Sensing exploits the high sensitivity of quantum systems to external disturbances to develop highly sensitive sensors. Breaking the limitations of today’s established imaging schemes is a …
Read More »What exactly happens to the body in space and what are the risks? Are the risks the same for astronauts who spend six months on the space station versus those who may be away on a Mars mission for years? The simple answer is “no.” NASA is researching risks for …
Read More »
Nanosatellite and microsatellite refer to miniaturized satellites in terms of size and weight, in the range of 1-10 Kg and 10-100 kg, respectively. ‘CubeSat’ is one of the most popular types of miniaturized satellites. These are the fastest growing segments in the satellite industry. One of the major advantages of nano …
Read More »
Internet access has historically been terrestrial or based on networks, such as fiber or other data cabling that is based on the ground. Cellular data is another common method of providing internet access. Satellite Internet access is Internet access provided through communication satellites. Satellite connections are often employed in remote …
Read More »
Satellite communication offers a number of advantages over traditional terrestrial point-to-point networks. Satellite networks can cover wide geographic areas and can interconnect remote terrestrial networks (“islands”). In the case of damaged terrestrial networks, satellite links provide an alternative. Satellites have a natural broadcast capability and thus facilitate multicast communication. Finally, …
Read More »
The design of digital circuits is currently dominated by hardware description languages such as Verilog and VHDL. This automation of circuit design has enabled the development of modern computer processors with billions of transistors. Integrated photonic devices, on the other hand, are still designed by hand. A designer first picks …
Read More »
There is global space race among countries to build Moon bases, harness it’s mineral resources and helium-3, fuel for future nuclear fusion power plants. Space agencies in China, Japan, Europe, Russia, Iran , Canada and a few private companies all hope to send people to the moon by as early …
Read More »
International Defense Security & Technology Your trusted Source for News, Research and Analysis