Results 231 to 240 of about 37,561 (266)
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A miniaturised frontend for Ka-band radar applications
2005 European Microwave Conference, 2005This paper presents a four quadrants monopulse frontend including a waveguide slot array antenna. The frontend has an extreme high level of integration due to the use of modern multilayer technologies. The applications for such frontends are imaging systems and military seekerheads operating in Ka-band. The size of the realised frontend is less than 80
A. Brokmeier +3 more
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Interoperability challenges for Ka‐band satellite systems
Space Communications, 2002For Ka‐band satellite systems to compete successfully in the broadband marketplace, two fundamental challenges must be addressed: cost, and the quality and performance of the offered services/applications. Specific issues related to these challenges are discussed and a set of solutions is proposed.
Prakash Chitre, Thomas Inukai
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Global mapping of attenuation at ku- and ka-band
IEEE Transactions on Geoscience and Remote Sensing, 2003The propagation of radio waves for Earth-space slant path at C-band and higher frequencies is dominated by precipitation in the atmosphere. At a given frequency, attenuation depends on the length of the radio path, the size distribution, and the phase state of the hydrometeor profile. Using the observations from the Tropical Rainfall Measuring Mission (
V. Chandrasekar 0001 +2 more
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Ka-Band Monolithic GaAs Balanced Mixers
Microwave and Millimeter-Wave Monolithic Circuits, 1983Monolithic integrated circuits have been developed on semi-insulating GaAs substrates for millimeter-wave balanced mixers. The GaAs chip is used as a suspended stripline in a cross-bar mixer circuit. A double sideband noise figure of 4.5 dB has been achieved with a monolithic GaAs balanced mixer filter chip over a 30- to 32-GHz frequency range.
C. Chao +3 more
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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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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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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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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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A Dual-Band High Gain Antenna for $K$ and $Ka$ Bands
2022 IEEE/CIC International Conference on Communications in China (ICCC), 2022Bing Jie Xiang, Kwai-Man Luk
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