Results 201 to 210 of about 37,561 (266)
Hyperspectral imaging for intraoperative brain tumor identification through fusion of spectral, textural, and spectral index features. [PDF]
PLoS OneLiu J +6 more
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Ka-band Integrated Transmitter for SATCOM
2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2020This paper presents a direct conversion transmitter integrated circuit (IC) implemented in 0.13um SiGe BiCMOS, targeting Ka-band satellite communications. The IC is comprised of an active IQ baseband filter with adjustable cutoff frequency 90 - 720MHz, IQ up-converter with gain control and local oscillator (LO) leakage compensation, LO generation ...
Nikos Naskas +6 more
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International Journal of Infrared and Millimeter Waves, 1994
A balanced upconverter circuit has been developed in planar transmission line configuration using NEC GaAs beam lead Schottky barrier diodes. RF power output of +1.6 dBm SSB is obtained at Ka-band when up converter is driven by +17 dBm IF and +20 dBm LO signal.
Susheel K. Verma +2 more
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A balanced upconverter circuit has been developed in planar transmission line configuration using NEC GaAs beam lead Schottky barrier diodes. RF power output of +1.6 dBm SSB is obtained at Ka-band when up converter is driven by +17 dBm IF and +20 dBm LO signal.
Susheel K. Verma +2 more
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Metasurfaces for Band-Pass Filter in Ka-Band
2021This paper establishes a coupled-mode theory (CMT) to help understand the inherent physics governing the transmission properties of a band-pass filter, based on which a two-layer metasurface exhibiting a wide band pass in Ka-band is designed. This method can be easily extended to other frequency regimes.
Yue Li +4 more
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2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
In the frame of the “Study into Ka-band SAR”, a project funded by the European Space Agency (ESA), the authors investigated new instrument concepts to implement a spaceborne high resolution interferometric SAR operating at Ka-band. In particular, thanks to the antenna separation which is required at these frequencies to achieve accurate height ...
Chiara Germani +5 more
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In the frame of the “Study into Ka-band SAR”, a project funded by the European Space Agency (ESA), the authors investigated new instrument concepts to implement a spaceborne high resolution interferometric SAR operating at Ka-band. In particular, thanks to the antenna separation which is required at these frequencies to achieve accurate height ...
Chiara Germani +5 more
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Proceedings of The 2nd International Conference on Satellite Communications, 2005
Ka-band hermetically Transceiver for radio-relay communications is designed. It has NF 25dB in receiver part and Pout>80mW, Gain>12dB in transmitter part for 38-39GHz.
V.M. Minnebaev, A.Yu Yevgrafov
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Ka-band hermetically Transceiver for radio-relay communications is designed. It has NF 25dB in receiver part and Pout>80mW, Gain>12dB in transmitter part for 38-39GHz.
V.M. Minnebaev, A.Yu Yevgrafov
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Development of Broad Band VCO at Ka-Band
International Journal of Infrared and Millimeter Waves, 2000A broad band VCO has been developed at Ka-band for FMCW Radar applications. To achieve a wide range of frequency variation, VCO has been designed in series configuration. Design steps have been presented. VCO exhibits a tuning range of 600 MHz with the power output of 50 mw, when the controlled varactor voltage varies from 7.5 volts to 15 volts ...
Meena R. Kumar, R. P. Dixit
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Ka/Q-band broadband, Ka and W-band low noise HEMT amplifiers
IEEE Military Communications Conference, 'Bridging the Gap. Interoperability, Survivability, Security', 2003The authors describe the design and fabrication of a Ka/Q-band (27-46-GHz) balanced amplifier, a W-band (81-GHz) low-noise amplifier (LNA), and a Ka-band (28-40-GHz) LNA. These three amplifiers utilize three types of high-electron-mobility-transistor (HEMT) technology.
E.D. Archer, Y.I. Ryu
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The regulatory status of the Ka-band
International Journal of Satellite Communications, 1999Access to frequencies is a major concern for all satellite systems. Even if the Ka-band is currently lightly used by Satellite Systems, the Regulatory rules which will govern its access to planned new Satellite Communication Systems have started to be changed during the last World Radiocommunication Conferences.
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2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2019
A Ka Band front-ended multi-function MMIC is proposed. This chip integrates one single pole double throw switch, low noise amplifier and power amplifier. It can cover relatively broadband frequency, f 0 −4 to f 0 +4 GHz band, with 26.5 dB measured gain and less than 3.5 dB NF at receiving chain.
Yijun Chen +4 more
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A Ka Band front-ended multi-function MMIC is proposed. This chip integrates one single pole double throw switch, low noise amplifier and power amplifier. It can cover relatively broadband frequency, f 0 −4 to f 0 +4 GHz band, with 26.5 dB measured gain and less than 3.5 dB NF at receiving chain.
Yijun Chen +4 more
openaire +1 more source