Results 221 to 230 of about 1,547 (268)
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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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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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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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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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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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Technology for millimetre wave systems
IEEE International Conference on Communications, Including Supercomm Technical Sessions, 1990Summary form only given. The use of the millimeter-wave spectrum above 30 GHz for telecommunications offers considerable bandwidth for broadband services, but power limitations and rain attenuation constrain its prospects to small 'cell' or short-hop systems.
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Journal of the Institution of Electrical Engineers, 1955
W.E. Willshaw +2 more
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W.E. Willshaw +2 more
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Routing techniques for millimetre wave communications
International Journal of Ad Hoc and Ubiquitous Computing, 2023openaire +1 more source