document title / titre du document TRP W ORK PLAN ... - emits - ESA

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TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 5.2 - Engineering and Verification Tools & Techniques TRP Reference: Title: T506-01EE European Antenna Modelling Component Library - Telecommunications The library shall be based on existing tools, while being able to easily incorporate the implementation of any new algorithms developed to satisfy emerging antenna engineering needs. The present activity will focus on the development of components specific to Telecommunication missions. In particular it will be articulated in two components: a structural component to ensure the background activity to pursuit the common objective of bringing forward antenna modelling technology and tools and a thematic component, dedicated to specific needs.-The structural component will focus on: the Earth Observation-specific aspects,electromagnetic modelling data domain standardisation, geometrical CAD tuned to electromagnetic modelling needs for telecommunication specific antenna configurations.-The thematic components will focus on: refinement of reflector antenna analysis tools , multi-frequency multi-coverage synthesis, improvement of antenna interaction models.The present activity will be carried out as part of the global development of the "European Antenna Modelling Component Library" foreseen by the above Dossier. Deliverables: Software component library with relevant documentation. Validation hardware (satellite and antenna mock-ups) Current TRL: Target TRL: Application Need/Date: Application/Mission: Contract Duration: SW Clause : - Dossier0 Ref.: Consistency with Harmonisation Roadmap and Conclusions: TRP Reference: T506-02MC Title: Modelling of Porous Shells Porous materials, such as triaxial woven fabrics, are being employed in antenna technology due to the significant mass reduction and acoustic load relaxation. The drawback being the RF transparency, limiting the application of current ultralight technologies to the Ku frequency band. Therefore, a reduction of hole size is needed and consequently the acoustic load case comes back to the scene. The objectives of this activity are:1.Vibroacoustic modelling of porous materials and triaxial fabrics, comprising material characterisation and a procedure for implementation into Finite/Boundary-Element vibroacoustic simulation.2.Thermo-elastic modelling of porous/triaxial shell. Material characterisation and implementation into Finite Element simulation. Deliverables: Identification of relevant parameters (analysis + existing data). Thermo-elastic/acoustic/RF characterisation (coupons + samples). Finite Element and Boundary Element modelling procedure. Correlation with sample tests. Current TRL: TRL2 Target TRL: TRL3-4 Application Need/Date: TRL5 >=2009-2010 Application/Mission: all spacecraft with reflectors) Contract Duration: 18 months SW Clause : - Dossier0 Ref.: T-7750 Consistency with Harmonisation Roadmap and Conclusions: Page 103 of 227
TRP Work Plan 2005-2007 Description of Activities TEC-SB/7935/dc 12/Feb/09 5.3 - High capacity multi-beam systems TRP Reference: Title: T501-02EE Active multi-beam antenna concept using advanced very high order multilayer BFN The objective of this activity is the design, manufacturing and test of critical components for a very high order Analog Beam Forming Network (BFN) for future Ka band broadband multimedia telecommunication missions. A promising approach may consist in implementing an active lens able to generate a very high number of adjacent beams (>50). This system includes a fine antenna pointing electronic correction for surface shape/deployment inaccuracy compensation. This innovative concept is foreseen to provide improvement toward in-orbit performance tuning, implementation feasibility, manufacturing accuracy relaxation, high reliability due to graceful degradation performance, low sensitivity to multipaction and PIM, and excellent power to beam flexibility. Such antenna architecture with high order BFNs represent a challenge and this activity will prove the capabilities of technology for their implementation. Advanced multilayer technologies and advanced design concepts and technologies are expected to be used leading to a compact and cost effective solution. Deliverables: Detailed design and critical breadboard. Current TRL: TRL1 Target TRL: TRL2 Application Need/Date: TRL5 by 2010 Application/Mission: Multibeam Telecom Contract Duration: 12 months SW Clause : - Dossier0 Ref.: T-7746 Consistency with Harmonisation Roadmap and Conclusions: TRP Reference: T501-04EE Development of high order propagation models for multimedia Satellite Communication Title: Systems The proposed activity is aimed to the development of models of high order statistics of radiowave propagation parameters relevant for Satellite Communication Systems operating at frequencies from 20 to 50 GHz. Existing models are mainly focused on the description of first order statistics of propagation parameters (like the atmospheric attenuation cumulative distribution function), but, because the design of advanced SatCom systems relies on Propagation Impairment Mitigation Techniques (PIMT) and on its integration with network control, additional information on higher order or conditioned statistics (e.g. fade duration, fade slope, seasonal and diurnal effects, instantaneous and long-term frequency scaling, spectral propertied and spatial and time correlation, etc. ) are needed. As well issues related to exploitation of Ka Band for EO and Science missions data downlink require new models. This new activity shall start by a critical review of existing models based on current and expected system requirements (like the QoS - Quality of Service - issues or PIMT design) along with the existing dataset collected during propagation experiments. The main core of the activity shall be constituted by: • Collection of data from past propagation measurements. • A new experimental propagation campaign, based on existing satellite beacons. • A data analysis and model development activity. • A validation and testing activity for the assessment of the accuracy of new models. Deliverables: Propagation models / SW Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: SW operational by 2009 Application/Mission: Satellite Telecommunication systems Contract Duration: 24 months SW Clause : Operational SW Dossier0 Ref.: T-7916 Consistency with Harmonisation Roadmap and Conclusions: Not directly linked to harmonised technology. Page 104 of 227
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