Results 131 to 140 of about 36,878 (167)
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A broadband linearizer for Ka-band satellite communication
1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 1998A compact, broadband linearizer has been developed at Space Systems Loral for Ka-band communication satellite (20 GHz down link). The pre-distortion type linearizer is capable of providing up to 10 dB gain compensation and 80 degree phase compensation, and is suitable for a broadband communication satellite.
W-M. Zhang, C. Yuen
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Ka‐band phased array system characterization
Space Communications, 2002Phased Array Antennas (PAAs) using patch‐radiating elements are projected to transmit data at rates several orders of magnitude higher than currently offered with reflector‐based systems. However, there are a number of potential sources of degradation in the Bit Error Rate (BER) performance of the communications link that are unique to PAA‐based links.
Roberto J. Acosta +3 more
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Broadband payloads for the emerging Ka‐band market
Space Communications, 2002In response to the demands for broadband satellite systems and services, TRW initiated the Gen*Star processing payload in 1995. The Gen*Star system objectives of profitable broadband connectivity with seamless interfaces to a terrestrial infrastructure imply highly reliable network nodes in space.
Mark Bever +4 more
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1963
Abstract : A K-band to X-band converter has been developed and placed in operation at a field site. The crystal is mounted in a modified K-band crystal mount. Several crystals were calibrated for field use. The measured parameters of bandwidth and conversion loss were 200 Mc and 12 to 15 db, respectively.
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Abstract : A K-band to X-band converter has been developed and placed in operation at a field site. The crystal is mounted in a modified K-band crystal mount. Several crystals were calibrated for field use. The measured parameters of bandwidth and conversion loss were 200 Mc and 12 to 15 db, respectively.
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1992
A Ka-band (20/30 GHz) prototype terminal has been developed to demonstrate the effectiveness of using Ka-band for small terminal communications. The design of a versatile VSAT is presented and each key component with its integration into the prototype unit is analysed and discussed.
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A Ka-band (20/30 GHz) prototype terminal has been developed to demonstrate the effectiveness of using Ka-band for small terminal communications. The design of a versatile VSAT is presented and each key component with its integration into the prototype unit is analysed and discussed.
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Ka-Band radar missions for earth observation
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013The use of Ka-Band in remote sensing creates new opportunities in Earth observation for science and civil security applications due to the unique characteristics of this higher frequency range. Several Ka-Band satellite missions and instruments are currently under development or close to launch (e.g. ALTIKA altimeter, SWOT satellite, etc). In addition,
Michael Ludwig +2 more
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2009
In this thesis holographic antennas are investigated as an alternate technology to reflectors and microstrip phased arrays for use in Ka-band applications. These antennas combine the advantages of low profile printed technology with an unconstrained feed to avoid excessive losses associated with conventional phased array feeds. The main purpose of this
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In this thesis holographic antennas are investigated as an alternate technology to reflectors and microstrip phased arrays for use in Ka-band applications. These antennas combine the advantages of low profile printed technology with an unconstrained feed to avoid excessive losses associated with conventional phased array feeds. The main purpose of this
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A comparative study of RADAR Ka-band backscatter
SPIE Proceedings, 2014Ka-band RADAR frequency range has not yet been used for Synthetic Aperture Radar (SAR) from space so far, although this technology may lead to important applications for the next generation of SAR space sensors. Therefore, feasibility studies regarding a Ka-band SAR instrument have been started [1][2], for the next generation of SAR space sensors.
Daniele Mapelli +7 more
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LTCC-technology for miniaturized Ka-band frontends
33rd European Microwave Conference Proceedings (IEEE Cat. No.03EX723C), 2003A modern state-of-the-art radar frontend for use in Ka-band radar applications like small seekers for missiles or drones has stringenst requirements to electrical, mechanical and thermal aspects. It has surely also be taken care on economical and environmental demands.
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Design of a Ka-band upconverter for satellite communication
2011 IEEE EUROCON - International Conference on Computer as a Tool, 2011This paper presents an upconverter which can be used in a Ka-band satellite transmitter. It can be a part of satellite interactive terminal for digital video broadcasting — return channel via satellite (DVB-RCS) or can be used in a point-to-point backhaul microwave link for mobile telephony. Using complex signals, polyphase filters are analysed so that
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