Development of alexandrite laser crystal treatment prior to coating deposition for high power space applications

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

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High power SP4T MEMS switch for space applications

2012 42nd European Microwave Conference ◽

10.23919/eumc.2012.6459296 ◽

2012 ◽

Cited By ~ 1

Author(s):

Paola Farinelli ◽

Hamza El Ghannudi ◽

Giuseppe Resta ◽

Benno Margesin ◽

Mirko Erspan ◽

...

Keyword(s):

High Power ◽

Space Applications ◽

Mems Switch

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Qualification and reliability testing of a commercial high-power fiber-coupled semiconductor laser for space applications

Optical Engineering ◽

10.1117/1.1902993 ◽

2005 ◽

Vol 44 (5) ◽

pp. 054204 ◽

Cited By ~ 2

Author(s):

Malcolm W. Wright

Keyword(s):

Semiconductor Laser ◽

High Power ◽

Reliability Testing ◽

Space Applications ◽

Coupled Semiconductor

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Volume and Mass Estimation of Three-phase High Power Transformers for Space Applications

2nd International Energy Conversion Engineering Conference ◽

10.2514/6.2004-5711 ◽

2004 ◽

Author(s):

Greg Kimnach

Keyword(s):

High Power ◽

Power Transformers ◽

Space Applications ◽

Mass Estimation ◽

Three Phase

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Highly Efficient and Multipaction-Free P-Band GaN High-Power Amplifiers for Space Applications

IEEE Transactions on Microwave Theory and Techniques ◽

10.1109/tmtt.2015.2493550 ◽

2015 ◽

Vol 63 (12) ◽

pp. 4429-4436 ◽

Cited By ~ 3

Author(s):

Natanael Ayllon ◽

Pier Giorgio Arpesi

Keyword(s):

High Power ◽

Power Amplifiers ◽

Space Applications ◽

Highly Efficient

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High Power Combline Filter for Deep Space Applications

International Journal of Microwave Science and Technology ◽

10.1155/2014/396494 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

A. V. G. Subramanyam ◽

D. Siva Reddy ◽

V. K. Hariharan ◽

V. V. Srinivasan ◽

Ajay Chakrabarty

Keyword(s):

High Power ◽

Filter Design ◽

Test Results ◽

Rf Power ◽

Space Applications ◽

Power Filter ◽

Rejection Filter ◽

Design And Testing ◽

High Rejection ◽

Orbiter Mission

An S-band, compact, high power filter, for use in the Mars Orbiter Mission (MOM) of Indian Space Research Organization (ISRO), has been designed and tested for multipaction. The telemetry, tracking, and commanding (TT&C) transponder of MOM is required to handle continuous RF power of 200 W in the telemetry path besides simultaneously maintaining an isolation of greater than 145 dBc to its sensitive telecommand path. This is accomplished with the help of a complex diplexer, requiring high power, high rejection transmit path filter, and a low power receive path filter. To reduce the complexity in the multipaction-free design and testing, the transmit path filter of the diplexer is split into a low rejection filter integral to the diplexer and an external high rejection filter. This paper highlights the design and space qualification phases of this high rejection filter. Multipaction test results with 6 dB margin are also presented. Major concerns of this filter design are isolation, insertion loss, and multipaction. Mission performance of the on-board filter is normal.

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