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

Annex 2Page 40Ref. Activity Title Procurement Policy Budget(KEUR)5C.093(09.153.39)Objective:Description:Planned TenderIssueCompact High Power S -band Output Matrix Open Competitive Tender Type: C 450 Priority 2 24Estimated Duration(months)The objective of this activity is to develop and test a Breadboard of a large compact multiport coupler for high power output matrices needed for 8x8 or larger MPAs in S-band. RFperformance, mass, footprint and cost savings shall be evaluated.Output matrices such as Butler Matrices are an enabling technology for multiport amplifiers (MPA) to achieve beam switching and steering in satellite systems. Standard output matrixconfigurations employed today consist of several stages of hybrids that are interconnected. For matrices larger than 4x4 this requires crossovers of connections resulting in complexassemblies. However, existing concepts of n -dimensional Riblet couplers or other single layer coupling concepts could offer considerable footprint reduction and significantly simplerassemblies. For output matrices this opens the possibility for improved thermal designs and less risk of PIM due to reduced number of piece parts as well as enabling compact high powerequipments for next generation satellite systems handling twice the power per channel compared to current designs. In addition it is well known that noise reduction of MPAs can be achievedby careful design of the output matrix. Thus the propagation of intermodulation products shall be analysed and considered in the selection of the design concept In order to demonstrate theadvantages and limitations of the developed concepts a compact S-band high power output matrix Breadboard shall be built and tested.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.Ref. Activity Title Procurement Policy Budget(KEUR)5C.102(09.153.40)Objective:Description:Planned TenderIssueInput Filters for L-, S-band applications Open Competitive Tender Type: C1 400 4Q 2009 24The objective of this activity is to manufacture and test breadboards of a new class of compact low loss L-, S-band input filters.Estimated Duration(months)Coaxial filters are currently standard technologies for L-, S-band input filters. The technology offers a wide range of flexibility as it can be tailored to narrow bandwidths, but also bandwidthsup to one octave can be achieved whilst maintaining excellent out-of band performance. However, this technology is inherently large and bulky since it is based on TEM air resonators. In thisactivity a new class of input filters shall be developed and tested based on TM mode dielectric resonators. Preliminary work has shown that a resonator footprint reduction up to 50% can beachieved compared with coaxial technology whilst maintaining the same in-band RF performance. However, this need to be carefully traded-off against the spurious performance and a designconcept for in-line and cross coupled filters for complex transfer functions shall be developed. Other challenges exist in mounting the dielectrics, which shall be addressed and solutionssuitable for space application shall be developed. In order to evaluate the developed concepts, different breadboards (3) shall be built and tested to validate this new technology including theachievable bandwidth and out-of band performance.