![]() ![]() ![]() The privately held startup is comprised of veterans of the satellite industry with expertise in propulsion systems. Note the "adjustable in-orbit altitude", "highly maneuverable" and "low cross-sectional area" attributes that the company highlights. Thus, we believe that given its performance and efficiency, our strategy may lead to an even greater number of small satellites in lower Earth orbit, and a more well-connected world.Earth Observant's Stingray satellite with its Space Shuttle-shaped "bus" or body. Shirane, "was found to be comparable to other state-of-the-art technologies at reducing gain variation. "Using the distributed on-chip radiation sensors and the current sharing techniques, we were able to drastically reduce the impact of radiation degradation and make the phased-array transceiver more energy efficient. Overall, this strategy was able to reduce the main lobe degradation and bring down gain variation while using a minimal amount of power, solving two major problems faced by existing small satellites. The current sharing techniques also brought down the power consumption of the satellite to the lowest reported value. Upon testing this new strategy, the researchers found that it led to less than 10% of the typical gain variation seen in small satellites. This was combined with current-sharing techniques to mitigate the gain variation and thus reduce the impact of non-uniform ionizing radiation on the radio and power consumption. These sensors can detect the gain variation between the chips of the antenna. To solve this the researchers created a phased-array transceiver with on-chip distributed radiation sensors. The team of researchers found out that in the conventional design of the phased-array transceiver on small satellites, the signal from the main lobe degraded by 3.1 dB in a year due to ionizing radiation. This helps to drastically reduce the effects of radiation degradation on the radio and power consumption." Shirane explains, "We propose a new phased array receiver strategy which involves on-chip distributed radiation sensors and current-sharing techniques. Their findings have been shared and published in the 2023 International Solid-State Circuits Conference. Thus, there is a need to mitigate radiation degradation to make small satellites more viable.įortunately, a team of researchers led by Associate Professor Atsushi Shirane of Tokyo Institute of Technology (Tokyo Tech) have reported a novel phased array receiver strategy to reduce the effects of radiation degradation in these satellites. This affects the performance of the satellite's radio due to the variation in the strength of signal they can sense - also known as gain variation. They also have a deployable membrane attached to the main body for a large phased-array transceiver, which causes non-uniform radiation degradation across the transceiver. However, due to their smaller size, these satellites have lesser radiation shield. They can reduce launch costs and increase the number of satellites in orbit, providing a better network with wider coverage. In this regard, small satellites have a lot of potential. Given the wide array of uses for satellites, especially in low Earth orbit (LEO), researchers are constantly trying to develop better ones. These satellites serve many different purposes in space, from GPS and weather tracking to military reconnaissance and early warning systems. ![]() A database updated in 2022 reported around 4,852 active satellites orbiting the earth. ![]()
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