Ultra Low Noise Amplifier

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We provide the Callisto range of ultra low noise amplifiers for use in satellite ground stations. The ultra-low noise performance is achieved by cryo-cooling the amplifier to leverage superconducting properties of the key electronic components.

Ultra-low noise amplifiers are necessary for satellite missions where link margins are critical, for example for Deep Space Missions. The use of cryogenically cooled LNAs can provide improved ground station G/T at a fraction of the cost of increasing the antenna diameter.

Applied to antennas from 9m to 35m in diameter, the increased amplifier performance can reduce antenna build costs by up to 50%. This way the unique designs reduce maintenance and running costs of satellite earth stations.

Below is an overview of the Callisto product line. Frequency bands not mentioned are available on request.

Ultra Cryogenic Low Noise AmplifiersAvailable in frequency bands: S, X and Ka-band.
Noise temperatures between 10 and 35K depending on the frequency band.
The refrigerator used to cool the amplifier down is designed for continuous operation with service intervals of more than one year.
Compact Ultra‐Low Noise AmplifierAvailable in frequency bands: X, K and Ka-band.
Callisto employs world leading cryogenic technology for its products and the Compact Cryo-LNA uses a light-weight, highly efficient and long-life cryogenic cooler. A Stirling-cycle cryo-cooler is used working at 80K, which combines the cold finger and compressor into one compact unit that can work in any orientation without maintenance intervention for over 10 years.
Miniature Cryogenic Low Noise AmplifiersThe LNA is intended for use on K band SATCOM antennas operating around 20 GHz for reception.  The LNA has two operating modes: Normal and Turbo. The difference between the two modes is the noise figure performance.  In Turbo mode the noise figure is significantly reduced (by a factor of 3) compared to Normal mode by cooling the LNA circuit.  The intended application is for military and civil critical data communications that require to boost the performance of the receiving system for certain periods of times such as Satcom-On-The-Move applications.