X-Band to Ka-Band Compact Ultra-Low Noise Amplifier (LNA)
Callisto has developed an ultra-low noise cryogenic amplifier for satellite ground stations which features zero maintenance cryo-coolers. The Cryo-LNAs improve antenna’s performance from X-band to Ka-Band frequencies.
Callisto designs and produces ultra-low noise cryogenic amplifiers for satellite ground stations. The new generation of Callisto’s LNA is equipped with patented zero maintenance cryo-coolers which allow a service life of 10+ years with no intervention for the cryo-cooler or vacuum integrity.
The device has been successfully used by clients such as CNES and ESA.
The LNA delivers a compelling antenna performance improvement in the sectors of:
- Radio astronomy and remote sensing bands of X-Band (8.0GHz) and Ka-Band (26GHz)
- Satcom K-Band (20GHz)
- Military Satcom (7.5GHz)
- Other frequencies on demand.
Please see the video with the following link: http://www.callisto-space.com/en/actualite/new-video-on-our-compact-cryo-lna.php
Two models are available: single and dual channel
Innovations & Advantages
The benefits of using a cryogenic LNA is that the Noise Temperature (NT) of the LNA can be typically halved, compared to a system with a conventional uncooled LNA. This enables the use of a smaller diameter antenna to achieve the required G/T performance. The Cryo‐LNA benefits include:
- Reducing antenna build costs by 20% or more.
- 150K€ savings for a 10m Earth Observation antenna.
- Reduced surface accuracy issues ‐ affecting side‐lobes, NT and Gain.
- Reduced windage issues and hence reduced tracking equipment costs.
- Improved antenna pointing operation (smaller antenna = wider beam).
- Improved data transfer rates, of up to 60%.
Reducing satellite emission power ‐ the 2dB additional margin allows a decreasing of the satellite transmit power, extending mission life.
The LNA’s specifications are presented Table 1
The Compact cryogenic LNA comprises the main RF and cooler unit (as pictured) and a power supply unit that can be either a compact module, or a 19” rack mount unit.
Current and Potential Domains of Application
The technology is suited for the following main applications:
- Deep Space Probes
- Earth Observation