Results 211 to 220 of about 2,770 (262)
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Terrain imaging millimetre wave radar
7th International Conference on Control, Automation, Robotics and Vision, 2002. ICARCV 2002., 2004This paper presents an overview of the work being conducted by the Australian Centre for Field Robotics (ACFR) and the CRC for mining technology and equipment (CMTE) into sensors and systems for real-time environment imaging. Radar is perhaps the only sensor capable of performing imaging tasks in environment where high levels of dust, water vapour, and
Steve Scheding +4 more
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The generation of millimetre waves
Proceedings of the IEE - Part B: Radio and Electronic Engineering, 1955Problems in the generation of millimetre waves are considered, and further study of sparked generators is found desirable. A contribution is made to the simple theory of such generators. Experiments made to verify the theory are not wholly successful, but their evidence, together with that of other workers, strongly suggests that this simple theory is ...
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Millimetre wave spectroscopy of PANHs: phenanthridine
Phys. Chem. Chem. Phys., 2007The pure rotational spectrum of phenanthridine (C(13)H(9)N), a small polycyclic aromatic nitrogen heterocycle (PANH), has been measured from 48 to 85 GHz employing Stark modulated millimetre wave absorption spectroscopy of a supersonic rotationally cold molecular beam.
Don, McNaughton +3 more
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Proceedings of the IEE Part C: Monographs, 1956
The construction and performance of a pulsed-millimetre-wave magnetron are described. The performance is compared with that of a “parent” valve, using Slater's scaling laws, and with theoretical standards. Some problems encountered in designing the valve and in holding close tolerances on the performance are discussed.
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The construction and performance of a pulsed-millimetre-wave magnetron are described. The performance is compared with that of a “parent” valve, using Slater's scaling laws, and with theoretical standards. Some problems encountered in designing the valve and in holding close tolerances on the performance are discussed.
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Physics in Technology, 1981
Advances of millimetre wave astronomy are discussed, particular attention being paid to the developments of receivers reflector antennas radiotelescopes and to the selection of suitable observing ...
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Advances of millimetre wave astronomy are discussed, particular attention being paid to the developments of receivers reflector antennas radiotelescopes and to the selection of suitable observing ...
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A diode modulator for millimetre waves
Proceedings of the IEE - Part B: Electronic and Communication Engineering, 1959A description is given of a small and inexpensive germanium pointcontact diode which has been developed for the high-speed switching of a carrier at 35000 Mc/s. The diode can typically modulate several hundred milliwatts of carrier power with a response time less than 3 millimicrosec. A novel modulator is described in which the insertion loss with such
K.J.S. Cave, W. Neu, A.C. Sim
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The millimetre-wave spectrum of estragole
Chemical Physics Letters, 2013Abstract The rotational spectrum of estragole has been investigated using a free-jet millimetre-wave spectrometer. Computational chemistry calculations at different levels of theory predict three possible conformers of estragole that are within 200 cm − 1 of each other.
Peter D. Godfrey +2 more
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Millimetric Waves Technologies: Opportunities and Challenges
2011Providing an available wideband and better antenna beam forming are two good profits of millimeter wave (mmWave) technology. MmWave technology makes radio systems lighter and smaller and radars more precise. Today, commercial MmWave equipment work below 90GHz frequencies. MmWave radios work to transport Internet traffic in the backhaul of communication
Jahangir Dadkhah Chimeh +1 more
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1987
In the millimetre wave frequency range, scaling becomes a problem so that copies of microwave devices become difficult to manufacture with adequate accuracy. Then special techniques suitable only for millimetre wave devices become necessary. This chapter concentrates on those techniques which are peculiar to ferrite devices operating at millimetre wave
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In the millimetre wave frequency range, scaling becomes a problem so that copies of microwave devices become difficult to manufacture with adequate accuracy. Then special techniques suitable only for millimetre wave devices become necessary. This chapter concentrates on those techniques which are peculiar to ferrite devices operating at millimetre wave
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Passive millimetre wave imaging
Electronics & Communication Engineering Journal, 1991The paper discusses the current status of passive millimetre wave radiometry as an imaging technique. The major problems are poor spatial resolution and lack of thermal sensitivity. Techniques for overcoming these difficulties are identified, including the use of aperture synthesis, multichannel receivers, correlation and inverse transform techniques.
R. Appleby, A.H. Lettington
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