ARTES-5.1 â ESA Telecom Technology Workplan ... - Emits - ESA

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Annex 2Page 51Ref. Activity Title Procurement Policy Budget(KEUR)Planned TenderIssueEstimated Duration(months)7-.016(09.153.43)Objective:Description:COSPAS-SARSAT antennas Open Competitive Tender Type: C1 350 Priority 2 18To design, analyse and implement a breadboard of a body-worn antenna for the COSPAS/SARSAT satellite system.Within a couple of years wearable antennas may find their place in our every day living; they will emerge in various sports and emergency workers’ outfits, military, medical and spaceapplications. The selected application for this particular activity is the COSPAS-SARSAT system where emergency beacons (100 - 400MHz range) are becoming more and more miniaturisedand now reaching a stage where they can be integrated in clothing provided a viable antenna solution exists. COSPAS-SARSAT, initiated in 1982, is an international search-and-rescueprogramme providing service at sea, in the air and on land anywhere on the globe. The system comprises a satellite constellation, orbiting the Earth continuously with the task of listening forsignals emitted by distress beacons.This activity will investigate wearable antenna solutions suitable for the COSPAS-SARSAT system. The wearable antenna shall be body-worn, lightweight and conformal to the body. Thiscan facilitate the hands-free operation of man-satellite communications and satellite search-and-rescue by being integrated in for instance survival suits and inflatable life rafts. Antennabending as well as water exposure, can have dramatic effect on the antenna performance in terms of antenna mistuning on various parameters, such as, gain, impedance matching and crosspolarization. These issues will be dealt with within this activity.The activity will comprise:- preliminary design of a wearable antenna- preliminary tests on materials/processes to verify approach- breadboarding and testing of a wearable antennaThe currently running <strong>ARTES</strong> 5 activity on wearable antennas considers antennas for L-band integrated in textile. The use of 100MHz to 400 MHz frequencies implies a need for largerantennas than at L-band, thus other techniques are required to make the antennas wearable.NOTE: This activity has been designated as "Priority 2". Priority 2 activities will only be initiated on the explicit request of at least one delegation.
Annex 2Page 52Ref. Activity Title Procurement Policy Budget(KEUR)7-.017(09.153.21)Objective:Description:Planned TenderIssueAntenna radome for SATCOM user mobile terminals Open Competitive Tender Type: C1 400 3Q 2009 18Estimated Duration(months)To identify suitable radome materials for different mobile satellite ground user terminal antennas operating in Ku- or Ka-band. The activity includes the definition, build and testing of arepresentative radome prototype suitable for one type of ground terminal.Satellite communication antennas for ground applications require radomes to protect them from the outdoor environment. Ideally, these radomes are electrically RF transparent not to affectthe antenna radiating performance. In reality, the radomes do contribute to the antenna performance parameters, such as cross-polarisation, sidelobes, beamwidth and boresight pointing. Allthese performance parameters can vary significantly when the antenna beam is steered at low elevation. The challenge lies in limiting any performance degradation caused by the radome butstill fulfilling the other requirements imposed by the operational environment. The land mobile (automotive, train), maritime and aeronautical environment all present different requirements interms of possible shapes, structural strengths and allowable cost of the radome. The operational frequency and bandwidth also impose constraints on the material build-up. In Ku- and Kabandfor instance, water on the radome can significantly influence the RF performance and coatings to limit aggregation of water are of interest. Another issue that needs to be considered isheat dissipation through the radome. An antenna system typically contains a power amplifier that generates heat and which suffers from performance degradation if not allowed to dissipateheat adequately.Currently available radomes have shortcomimgs in one or more of the following aspects: ability to dissipate the heat generated by the transmitter inside the radome, ability to withstand theimpact of being hit by a bird when the vehicle moves at high speed such as a train at 300 km/hour, transparancy depends on the polarisation of the signal.The activity will investigate state-of-the-art materials, multilayer structures, metamaterials and RF techniques to minimize potential performance degradation while trying to reduce cost.Radome materials suitable for all types of user terminals, i.e. car, train, and airplane, will initially be considered through study and material sample realisation and measurement. A prototypemodel will be designed, manufactured and tested for one selected type of user terminal.In this activity, the contractor shall:- Expand and refine requirements for radomes.- Study and identify suitable material technology candidates for antenna radomes for Ku- and Ka-band and for the aeronautical, maritime and land mobile environment.- RF test these candidates at sample level.- Propose best candidates.- Design, manufacture and RF test a prototype radome for a selected environment (e.g. Ku-band maritime).
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March 2009ARTES-5.1 - ESA Telecom T
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Annex 1Page 1ANNEX 1SUMMARY TABLE F
Page 5 and 6: Annex 1Page 3ActivityRef.Title Cost
Page 7 and 8: Annex 2Page 21. SYSTEM/NETWORKS/PRO
Page 9 and 10: Annex 2Page 4Ref. Activity Title Pr
Page 15 and 16: Annex 2Page 101.2 PropagationRef.al
Page 17 and 18: Annex 2Page 12Ref. Activity Title P
Page 19 and 20: Annex 2Page 142. SPACE SEGMENT - GE
Page 21 and 22: Annex 2Page 162.2 Propulsion System
Page 25 and 26: Annex 2Page 202.3 AOCSRef. Activity
Page 27 and 28: Annex 2Page 222.4 Thermal SystemRef
Page 58: Annex 2Page 53Ref. Activity Title P
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ARTES-5.1 â ESA Telecom Technology Workplan ... - Emits - ESA