Recent Advances in High Power High Temperature Satellite Multiplexers

Fiedziuszko, George; Howell, A. S.; Lee, Hoover; Holme, S.C.

doi:10.2514/6.2011-8010

Cited by 2 publications

(2 citation statements)

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“…However TE11n INVAR cavities are intrinsically bulky and cannot optimally handle high power levels (> 250 W), due to poor thermal conductance of the material and limited Q of the cavities. Cumbersome thermal control systems, such as heat straps, have been employed [3] but the methods further increases mass and do not solve the problem of very high hot-spots.…”

Section: Discussion Of Problem Areas and Technology Trendsmentioning

confidence: 99%

“…Examples are found in the reverse band 17. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].8 GHz as downlink over Americas (DirecTV 14 and 15) and in the 21.4-22.0 GHz band over Europe (W3A and Sirius 4). Channel separation and recombination is achieved by means of IMUX and OMUX respectively, with an irregular global/shaped beam illuminating a large number of users.…”

Section: A Hdtv Mission (One-way)mentioning

confidence: 99%

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Challenges in the Design of Next Generation Ka-Band OMUX for Space Applications

Paolis

Ernst

2013

31st AIAA International Communications Satellite Systems Conference

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Ka-band satellite payloads conceived to date are largely based on conventional output section equipment and architectures. With many dedicated and hybrid Kaband missions now on the horizon, it is evident that high-performance output multiplexers (OMUX) will be an enabling technology for both Ka-band HDTV and multimedia satellite applications. Unique needs to satisfy multiple challenging requirements in parallel push for an evolution of OMUX hardware, in terms of lower dissipation losses, higher packaging density, and optimized temperature stability. This paper describes the challenges to be faced in OMUX developments for next generation Ka-Band satellite payloads and provides an overview of relevant activities supported by ESA. Nomenclature ARTES = Advanced Research in Telecommunications SystemsCTE = Coefficient of Thermal Expansion DBS = Direct Broadcast Systems EIRP = Effective Isotropic Radiated Power ESA = European Space Agency HDTV = High Definition Television IMUX = Input Multiplexer OMUX = Output Multiplexer Q = Quality Factor TWTA = Travelling Wave Tube Amplifier VAS = Valued Added Service

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Section: Discussion Of Problem Areas and Technology Trendsmentioning

confidence: 99%

Section: A Hdtv Mission (One-way)mentioning

confidence: 99%