Results 221 to 230 of about 37,561 (266)
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Ka-band services and technologies
IEE Colloquium on Current Developments in INTELSAT, 1997This paper summarizes the potential interactive multimedia services to be offered by future Ka-band systems. The focus is on examining the nature and characteristics of the potential end-user services and system configurations. In addition, the Ka-band system technologies facilitating deployment of these services are reviewed, strongly indicating that ...
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LHCP/RHCP reconfigurable transmitarray in Ka-band
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015In this contribution, we propose the design of a circularly-polarized reconfigurable transmitarray based on a 1-bit unit-cell (i.e. with two phase states, 0° and 180°) operating in linear polarization. Applying the sequential rotation technique, the possibility to switch between the two circular (LHCP/RHCP) polarizations will be presented.
Di Palma, Luca +5 more
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Materials Science Forum, 2018
In this thesis, the RF front-end was done at K/Ka (18-27 GHz/26.5-40 GHz) bands used for satellite communication and satellite TV [1]. In this study, vertical polarized signal transmission and horizontal polarized signal reception were performed. The design is set to be compatible with TURKSAT 4B [2]. RF front-end is consist of an offset dish providing
Torpi, Hamid, Mecidoğlu, Harun
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In this thesis, the RF front-end was done at K/Ka (18-27 GHz/26.5-40 GHz) bands used for satellite communication and satellite TV [1]. In this study, vertical polarized signal transmission and horizontal polarized signal reception were performed. The design is set to be compatible with TURKSAT 4B [2]. RF front-end is consist of an offset dish providing
Torpi, Hamid, Mecidoğlu, Harun
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IEEE MILCOM 2004. Military Communications Conference, 2004., 2005
The rapid growth of the digitized battlefield is placing greater demands on spectrum use. High bandwidth/data rate requirements and non-line-of-sight communication links move one toward the use of high frequency and high bandwidth satellite communications.
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The rapid growth of the digitized battlefield is placing greater demands on spectrum use. High bandwidth/data rate requirements and non-line-of-sight communication links move one toward the use of high frequency and high bandwidth satellite communications.
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Characteristics of microfabricated rectangular coax in the Ka band
Microwave and Optical Technology Letters, 2004AbstractMiniaturerectangularcoaxial transmission line (with a 300 × 300 μm outer conductor) is simulated, fabricated, and tested up to the Ka band. It is made by the electrochemical fabrication (EFAB™) of nickel such that the center conductor is supported primarily by ≈λ/4 stubs that also establish a resonant passband. The minimum insertion loss of a 1.
Brown, Elliott R. +7 more
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Ka-band scintillations: measurements and model predictions
Proceedings of the IEEE, 1997New propagation data from a 30/20-GHz propagation experiment at several US sites, including Fairbanks, AK, and Norman, OK, are presented to examine existing models for scintillations. Beacon measurements were collected at one sample per second continuously and at 20 samples per second for selected intervals. The widely separated measurement frequencies
Charles E. Mayer +3 more
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Radar Reflectivity Measurements Of Ice at Ka Band
IEEE Antennas and Propagation Magazine, 2011Naval and helicopter radars may face operational scenarios where radar returns from the surface of ice become valuable. Partly due to that, we have measured the radar reflectivity of sea ice at Ka band for very small grazing angles. For an angle of 0.7°, an effective reflectivity of -26 dBsm ± 2 dB was observed with horizontal polarization.
Ruoskanen, Jukka +3 more
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IEE Seminar Microwave and RF Power Amplifiers, 2000
The design and measured results of a Ka-Band (26-40 GHz band) power amplifiers (PA) are introduced and discussed. Ka-band PAs are intended for military purposes. With PAs frequently being the primary focus in a communication system, Ka-band power amplifier applications will become more prominent in the near future. (6 pages)
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The design and measured results of a Ka-Band (26-40 GHz band) power amplifiers (PA) are introduced and discussed. Ka-band PAs are intended for military purposes. With PAs frequently being the primary focus in a communication system, Ka-band power amplifier applications will become more prominent in the near future. (6 pages)
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A Ka-Band Electronically Tunable Ferroelectric Filter
IEEE Microwave and Wireless Components Letters, 2009This letter presents a three-pole tunable Ka-band coplanar filter that includes six high-Q BST ferroelectric capacitors. It tunes from 29 GHz up to 34 GHz (17%) with low bias voltages ranging from 0 V to 30 V. The filter has fractional bandwidths of 9.5-12.2%.
Courrèges, Stanis +7 more
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A Ka-Band GaAs Monolithic Phase Shifter
IEEE Transactions on Microwave Theory and Techniques, 1983The design and performance of a GaAs monolithic 1800 one-bit switched line phase shifter test circuit for Ka-band operation is presented. A self-aligned gate (SAG) fabrication technique is also described that reduces resistive parasitic in the switching FET's.
V. Sokolov +4 more
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