Jean Maynard

High accuracy wide band analog predistortion linearizer for Telecom satellite transmit section

This paper proposes a new predistortion linearizer module for TWTA allowing to reach high linearity performance on a wide frequency bandwidth for Telecom satellite transmit section. This linearizer module includes a new advanced shape tuning capability associated with an embedded limiting function. A C/I3 improvement of more than 16dB at −7dB IBO per carrier and a NPR increase of 5dB at −3dB OBO were for instance obtained thanks to this new linearizer architecture on the overall 10.7 – 12.75GHz Ku-band (2.05GHz bandwidth). NPR performance is now very close to the optimal theoretical response of the “ideal limiter”.

Ka Band power limiter for satellite channel amplifier

Some Ka-Band payloads request an anti-jamming capacity to be protected against RF interference attacks. This performance can be provided by Thales Alenia Space Ka-Band channel amplifiers thanks to the new Ka-band hard limiter. The power limiter presented in this paper allows to perform this limitation over a 10 dB power dynamic range in the frequency band 20.2 – 20.9 GHz providing in addition tuning capabilities and taking into account the design de-rating rules mandatory for space application.

Very High efficiency Dual Flexible TWTA, a flexible concept allowing to deal with performances and schedule constraints of Telecommunication Payloads

TWTA remains the most efficient solution for Power Amplifiers dedicated to Telecommunication Payloads. In answer to the request from Satellite Operators, Integrators and Designers for more and more flexible solutions, Thales Alenia Space proposes a Very High Efficiency Dual TWTA with Flexibility features directly accessible from ground. This Dual Flexible LCTWTA offers opportunities of independent TWT Power controls over a 3dB range, together with the TWTs efficiency maximization at the operating frequency within the TWT product family frequency band.

1GHz instantaneous wide-band analog predistortion linearizer for new Telecom satellite transmit section

This paper proposes a new predistortion linearizer module for TWTA enabling to use broadband multi-carrier signals for new Telecom satellite transmit sections. A state-of-the-art NPR performance was obtained over the entire 10.7-12.75GHz Ku-band for multi-carrier signals up to, at least, 1GHz instantaneous bandwidth.

New Analog Predistortion Linearizer for Ku-band TWTA allowing 1GHz Instantaneous Wide-Band Satellite Operation

This paper proposes a new wideband predistortion linearizer for TWTA enabling to use broadband multi-carrier signals for the new Telecom satellite transmit sections. The linearizer has been embedded in a channel amplifier equipment and successfully tested with a wideband Ku-band TWTA. A state-of-the-art NPR performance was obtained over the entire 10.7–12.75GHz Ku-band with multi-carrier signals up to 1GHz instantaneous bandwidth.

Advanced Flexible Ku band MPM ARTES 3

TWTA + LCAMP assembly takes a major place in most of today communication Payloads. It is therefore a strategic product in which Thales Electron Devices, Thales Alenia Space Belgium, Thales Alenia Space France, (respectively for TWT, EPC, and Linearized CAMP) have either the world-wide leadership or a major situation in the satellite market.

New Linearizer Channel Amplifier family designed to optimize TWT operation

This paper presents a complete new family of Linearizer / Channel Amplifier designed to further optimize the Traveling Wave Tube (TWT) operation by providing close-to-ideal TWT linearization and offering new features improving TWT operating point management. The building block approach allows to handle a rich portfolio of needs from C to Ka band, with all known ground command and telemetry interface formats. Designs can also readily be adjusted to specific mechanical interface constraints while remaining compatible with mass production to cope with the sharp growth of the telecommunications satellite demand.

New wide band advanced predistortion lineariser for space applications

This paper proposes a new predistortion lineariser architecture allowing a new advanced shape tuning capability in addition to the classical magnitude control of the gain expansion and phase shift. This new feature is compatible with a wide band operation. A frequency bandwidth of 1.8 GHz has been demonstrated with a Ku-band TWTA between 10.95 and 12.75 GHz. A C/I3 improvement of about 20 dB at -6 dB IBO per carrier and a NPR increase of 7 dB at -6 dB IBO were obtained thanks to this new lineariser concept with regard to a conventional diode predistortion lineariser. This advanced lineariser is currently introduced in the new Thales Alenia Space Linearised Channel Amplifier space equipment (LCAMP).