TESAT can offer appropriate Laser Terminals for a wide range of applications. In the case of the SpaceDataHighway, this is the LCT135, which can transmit up to 1.8 Gbps over distances of up to 80,000 kilometers, safely, quickly and completely fail-safe. Through this geostationary backbone, TESAT technology enables worldwide data transmission in near real-time.
For applications in Low-Earth Orbits (LEO) there is the SmartLCT, which can be deployed on smaller, lighter satellites with huge weight and size savings. Data transmission over distances of up to 45,000 kilometers while maintaining the high data rate of up to 1.8 Gbps, the SmartLCT weighs just about 30 kilograms.
For even smaller satellites, TESAT's Laser Portfolio offers the TOSIRIS and CubeLCT, which can transmit Direct-to-Earth data at speeds of 10 Gbps (TOSIRIS) or 100 Mbps (CubeLCT). Particularly impressive is the associated reduction in weight. The already small representative TOSIRIS comes to only 8 kilograms while the CubeLCT with an edge length of just 10 centimeters weighs only 360 grams.
The groundbreaking feature is that TESAT LCTs are already helping to increase the satellite's reception capacity by up to 50%, as more data can be transmitted in less time. This makes it possible to re-record the entire global land mass (150 million km²) in just 5 days, while making it available in less than 15 minutes.
Revenues in laser products
Optical Satellite Links
Success rate in performing ISLs
Years of in orbit operation
The ConstellationLCT from TESAT is up for another, new challenge on global satellite market: LEO constellations. This addresses the demand of evolving digital infrastructure and increasing data requirements. Facing the hottest developments in the “constellation race”, the development of the ConstellationLCT was driven by the idea to revolutionize communication technology and to excel the prevailing.
The SmartLCT, is following big footprints and has its area of application on smaller and more agile satellites in lower orbits – first designated launch will be later this year. Beyond, it is already scheduled for operation on European Commissions’ Copernicus Next Generation mission. Having its focus on Earth observation mission, the SmartLCT with its adjustable building blocks is also suitable for inter-satellite links on satellite navigation missions.
Data rate: 1.8 Gpbs LEO to GEO
Range: 45,000 km
Volume: 4 subunits: < 35 x 35 x 20 cm³ per subunit
The LCT135 is still the undisputed top dog and working horse in cases of space-based laser communication. 9 terminals have been put to work in orbit yet and performing flawlessly for by now up to 12 years, executing more than 1,000 laser links per month. While aging, the 135 is far from getting old and achieved in 2019 with the launch of EDRS-C another great milestone.
The CubeLCT answers the rising demand for low latency and high bandwidth for small spacecraft in a world of increasing data and decreasing frequency band disposability. It is the product of a longterm research cooperation between the Institute of Communications and Navigation of the German Aerospace Center (DLR-IKN) and TESAT, which has now come to full bloom bearing a ready-to-launch LCT for Small and especially for CubeSatellites.
The TOSIRIS was developed in a cooperation with the DLR-IKN. After years of development and improvement, this compact LCT is awaiting its next big milestone with its installation on the International Space Station. After being shipped to the customer in October 2020, TOSIRIS will be deployed to Bartolomeo, the new platform for the research module Columbus, in the beginning of 2021, and so catapulting the ISS into the gigabit era.
Data Downlink Subsystems in X-Band have a considerable heritage in numerous Earth Observation programs conducted for more than 20 years. Based on this long experience, Tesat is developing an integrated Downlink Transmitter solution.
Frequency band: X-Band 8,025-8,400 MHz
Power Amplifier: 20 W SSPA (GaN based)
Modulation: QPSK, 8PSK, 16-APSK, 32-APSK, 64-APSK
Coding: SCCC (CCSDS 131.2.B.1)
Data rate: up to 1,300 Mbps (symbol rate of up to 250 Mbps)
The TESAT approach is to be able to offer a family of TT&C transponders for different application scenarios. Further to the available S-Band transponder, a Ku-Band transponder has been qualified. Within the developments further operational modes will be implemented, which are contained within the TT&C standards, allowing systems to expand the functionality of the TT&C links. A Ka-Band Demonstrator incl. Spread Spectrum technology has been validated, whilst our universal S-Band TT&C Transponder has a flight heritage of up to 50 units and is suited for all kind of missions.
HDI TR Module
The TR modules are optimized for broadband efficiency between in- and output (power added efficiency) and consist of an Active RF magazine and a Housing & RF transition. This concept results in a maximized reduction in space, weight and time. For cost optimization, the Magazine is produced on a mass-customization approach man-less hybrid assembly line that is capable of a maximum output of over 100,000 units per year. The Housing for the standard interfaced Magazine is manufactured on TESAT’s well-established passive manufacturing line.
Frequency band: Ku- / Ka- Band
Output power: up to 35 W
Power added efficiency: >30 %
Solid State Power Amplifier
Based on 30 years experience, TESAT has designed and manufactured several hundreds of SSPAs for space applications. With the new generation, we are now able to offer up to 120 W SSPA in L- and S-Band and up to 60 W in C-Band. To serve market needs and high volume production of SSPAs, we have harmonized our capabilities between MPM and SSPA manufacturing lines. New aims in this segment are higher integrated solutions and to develop SSPAs for Ku-/Ka-Band.
Over the last years, we have invested into the new GaN-Technology to develop high efficiency and reliable SSPA in the lower frequency bands (L-, S-, C-, X-Band). In the future, we will extend our portfolio with Ku- and Ka-Band. In terms of functionality and complexity TESAT can deliver either high power hybrids usable in active antennas or SSPAs as equipment with a DC/DC converter and extended functionality like channel amplification etc.
Microwave Power Module
The Microwave Power Module (MPM) is our standard amplifier. This “all-in-one” comprising of the TWT, the EPC and the Linearized Channel Amplifier (LCAMP) provides significant mass and footprint savings whilst additional cost and mass savings can be found within the use of Dual-MPM versions.
This integrated solution gives many advantages in terms of mass, mounting area and simplification in payload integration. In addition we can achieve better EMC characteristics and centralized connections to the EPC for DC and all TC/TM functions of the MPM. MPMs exist as single as well as dual units. Dual units use one EPC to supply two independent TWTs. Most MPMs are also available with radiation or conduction cooled TWTs.
Key parameters Q-Band MPM
Frequency band: Q-Band 37.5 GHz - 42.5 GHz
Output Power: up to 80 W
Power added efficiency: > 60 %
OMUXes are designed and produced in different technologies to meet customer demands. The classical OMUX technology based on Invar filter is complemented with the upcoming Aluminium technology to provide high power-handling capability in Ku- and Ka-Band. Diplexers are combining output signals of OMUXes to increase the number of channels per antenna. To reduce footprint and integration effort on the Payload, TESAT is providing assemblies with three or more layers. These highly integrated subunits can be configured and designed to customer specifications.
IMUXes feature excellent RF performance and temperature stability. Due to forward-looking stock policy for parts, a good delivery time and a high producibility can be ensured. A proven concept of modularity opens up the benefit of flexibility to provide customer-specific IMUX configurations.
Waveguide Switches are a key component for redundancy and configuration concepts. These switches have a high reliability and excellent RF performance. Sequential and random access actuators for changing switch branching can be provided for Payloads. The product spectrum was increased in continuously responding to market request for TESAT to offer all frequency bands from 3 to 40 GHz.
Components such as Couplers, Loads or Circulators are designed and manufactured from 3 to 40 GHz. These products have a high producibility and some follow ESA guidelines of manufacturing. For high-power components such as Loads and Circulators, a dedicated test setup is available to ensure a systematic screening process.