Konzeptstudie - Linearisierter Verstaerker fuer Satellitenanwendungen (LVS) Schlussbericht

New concepts of telecommunication satellites request very small, highly integrated and linearised travelling wave tube amplifiers (LTWTA). A linearised channel amplifier (LCAMP) and an electronic power conditioner (EPC) was developed to be integrated together building one unit for the C- and Ku-Band. The LCAMP was designed for a short travelling wave tube (STWT) and optimised mechanically for the integration with the developed EPC regarding best electrical performance, volume and weight. This could be realised by applying new components (like SMD-parts, ASIC and MMIC) and the development of a new housing. One major task was the selection of a MMIC-manufacturer, the designing of MMIC and the final testing for the LCAMP. A potential high-rel manufacturer (UMS- united microwave semiconductor) has been selected and the measured results of the MMIC are close to the calculated. An ESA-evaluation was performed in the frame of LVS-Study at UMS successfully. Bosch evaluated the market for microwave packages and selected finally Kyocera who provides packages for applications up to 20 GHz. The experience during procurement of packages was important for integration of MMIC into LCAMP. The LCAMP was integrated with the EPC in C- and Ku-band and finally tested with the STWT. Particular good results were measured for intermodulation products and phase shift behaviour. All other requirements of the integrated LTWTA were fulfilled, if they are in the nature of the LCAMP and EPC only. The achieved size of the EPC is 198 x 110 x 60,5 mm and the total weight of the LTWTA is about 2300 grams (including channel amplifier, lineariser, EPC, STWT and connecting cables). (orig.)SIGLEAvailable from TIB Hannover: F00B751+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany); DLR Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Bonn (Germany)DEGerman