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Sector 3: Technology

Europe’s own non-dependent ”Large Deployable Reflector Subsystem” (LDRS)

LEA Logo – Large European Antenna
Chapter 3.1.

Milestone History

LEA (Large European Antenna)

  • Planned DateMilestoneAchieved date
  • 11/2017 (√)Kick-Off Meetingachieved on 02.11.2017
  • 01/2018 (√)Mission Selection Workshopperformed on 18.01.2018
  • 03/2018 (√)Specification Definition Workshopperformed on 22.03.2018
  • 07/2018 (√)Preliminary Design Review (PDR)performed on 20.07.2018
  • 10/2018 (√)Sample & Breadboard Campaign Status Meeting and 1st EC Reviewperformed on 22.01.2019
  • 04/2019 (√)Critical Design Review (CDR)performed on 11.04.2019
  • 05/2020Breadboard Qualification achieved on 01.05.2020
  • 01/2021Final Test Readiness Review (TRR)
  • 04/2021Delivery LEA Protoflight Model (PFM)
Chapter 3.2.



ParameterDeployable reflector subsystem specs LEA-Follow-Ons
Antenna TypeSingle- or multi-feed offset parabolic circular apertureFor LEA project: just test-feedFlight model feed cluster/chains
Frequency BandX-band for reflector Mesh targets Ku-bandPFM: X-band up to 10.65 GHz;
RF-tests on mesh: up to 18.7 GHz
Technologies and processes target Ka-band
Dimensions (deployed)RF-aperture diam.: > 5.1 mmaximum diameter of the reflector ring structure: > 6.0 mReflector/arm design fit fordiameter/lengths of up to 20 m (25 m tbc.)
F/D (lengths/diam.)1.0Requirements are set to fulfill both earth observation as well as telecom missionsF/D adaptable between 0.5 and 2.0
Surface Accuracyup to λ /50 RMS
(RMS ≤ 0.56 mm)
Pointing Accuracy0.04° (tbc) beam de-pointing half cone angleAn active pointing mechanism is not foreseen as baseline in the LEA-PFM-developmentActive pointing mechanism is under evaluation and can be implemented
Reflective surfaceKnitted metallic mesh of gold-plated tungsten wireRF losses ≤ 0.1 dB for incidence angle ≤ 40°
Electronics and SoftwareSensors, heaters, harness, control electronics, EGSEControl electronics in LEA only EM level, architecture: flightFlight model onboard control electronics and software

Deployed LEA dimensions © HPS GmbH

Deployed LEA dimensions © HPS GmbH

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