User Terminal RF Systems Architect UT Modem Antenna

Be part of a new era in communications, transforming connectivity with Eutelsat – the world’s first GEO-LEO integrated global satellite operator.

As a leader in satellite communications, we provide global connectivity solutions - connecting businesses, communities, and governments around the world. We can connect you at on land, at sea and in the air. We also deliver broadcast television channels and packages, transmitting vital news reports around the world.

With Eutelsat You’ll Get To:

• Pioneer the future of Space Technology
• Bring connectivity to remote frontiers
• Collaborate with customer-centric experts
• Embrace cultural diversity in our global team

In a dynamic industry where passion drives our teams to make a difference to become the most trusted partner for global satellite connectivity, you will elevate your skills in a stretching, rewarding, and meaningful environment. At Eutelsat, we’re united by inclusion and diversity, striving for gender balance and social responsibility, on Earth and in Space.

Why Eutelsat ?

• Commitment to Diversity & Inclusion: With colleagues from over 75 countries, we embrace our global DNA and are committed to creating an inclusive workplace. We are proud that one-third of our executive team and 60% of our board are represented by women.
• Ways of Working That Drive Us: As "One Team," we work collaboratively towards shared goals, with customer-centricity, respect, and inclusivity as our guiding principles.
• Sustainability at Our Core: At Eutelsat, sustainability is more than just a word; it’s woven into our strategy. We’re dedicated to balancing social, environmental, and economic growth — both on Earth and in space.
• Work-Life Balance: We offer flexible schedules and hybrid work options to help you balance your personal and professional life. At Eutelsat, we are committed to supporting your well-being and ensuring you have the flexibility you need to succeed both at work and at home.

What you'll do

• Own the modem to antenna interface control document and keep it alive through the programme: digital and analogue signal interfaces, JESD204D/E lane rates, subclass and deterministic latency, analogue IQ alternatives, sampling and clocking plan, reference and 1PPS distribution, control and telemetry plane, beam pointing and beam switching commands with their latency, calibration data flow, gain and AGC partitioning between antenna and modem, power sequencing, and the thermal and mechanical boundary conditions;
• Own the end to end RF budgets and their traceability to service performance: G/T and EIRP at terminal level, noise figure and gain cascade, linearity and intermodulation, power amplifier back-off and efficiency, spurious and harmonics, image rejection and IQ imbalance, frequency and LO plan with spur analysis, and filtering and selectivity against adjacent systems;
• Own the phase noise budget across reference oscillator, PLL and synthesisers, converter clocking and SYSREF distribution, and translate it with the modem architect into its effect on carrier phase tracking, EVM and demodulation margin;
• Allocate the impairment budget between the radio chain and the physical layer, and arbitrate the trade-offs that follow: how much correction is done in silicon and how much must be paid for in hardware;
• Assess and challenge the electronically steered antenna design: array architecture and beamforming approach, element and array patterns, scan loss, sidelobe and grating lobe behaviour, polarisation and axial ratio, calibration strategy and its drift over temperature, pointing accuracy, beam switching time, and their consequences on link availability during satellite transitions;
• Review the modem module radio chain: transceiver and RFIC selection, up and down conversion, filtering, amplification, gain distribution and control range, converter interfacing, isolation and coexistence between transmit and receive, and layout and shielding constraints;
• Assess thermal, power and mechanical constraints as RF performance limits: dissipation of the amplification stages, derating, thermal drift of gain and phase, and their effect on the budgets under real operating conditions;
• Define the RF and over-the-air measurement plans, supervise campaigns run internally or in external facilities, and verify measured results against the budgets rather than accepting summary reports: conducted measurements, anechoic or near-field pattern characterisation, EIRP and G/T verification, EVM and spectral behaviour;
• Define acceptance criteria and milestone entry and exit conditions for RF deliverables, and lead the technical reviews with partners and integrators, arbitrating on measured evidence and analysis;
• Contribute to architecture and so