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Hybrid beamforming for downlink multiuser millimetre wave MIMO-OFDM systems
IET Communications, 2019In this study, the authors consider multi-user millimetre wave (mmWave) multiple-input multiple-output (MIMO) downlink communications for multi-carrier scenarios, e.g.
Didi Zhang +3 more
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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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Generation of 60-GHz Millimetre Wave with 20-GHz DSB Optical Millimetre Wave
Chinese Physics Letters, 2008A new scheme to generate a 60-GHz millimetre (mm) wave by tripling the frequency of the 20-GHz DSB optical mm wave is proposed. According to our analysis and numerical simulation of transmission along a fibre, this scheme can not only eliminate code form distortion, but also reduces the influence of fading effect as it transmits along the fibre ...
Ma Jian-Xin +5 more
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Effect of atmospheric absorption on millimetre wave frequencies for 5G cellular networks
IET Communications, 2019Wireless Communication technologies are growing rapidly to meet increasing demands of users. This creates overhead in existing wireless systems. This manifests in the continuous development of wireless systems to keep pace with the increasing capacity ...
Yusra Banday, G. M. Rather, G. Begh
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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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The millimetre wave future of telecommunications
Physics Bulletin, 1969There now appears little doubt that telecommunications with millimetric microwaves will play a leading part in the transmission of visual, audio and digital information. The prospects for the millimetric region of the electromagnetic spectrum appear much more attractive than for the wavelengths at which lasers can operate, for a number of reasons.
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Tenth International Conference on Antennas and Propagation (ICAP), 1997
A modern innovative measurement system is presented. The system allows for the measurement of millimetre wave propagation in urban and sub-urban areas. The system was expressly designed to allow easy propagation modelling. These features were obtained by acquisition in a georeferred basis of measured data in order to facilitate their comparison with ...
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A modern innovative measurement system is presented. The system allows for the measurement of millimetre wave propagation in urban and sub-urban areas. The system was expressly designed to allow easy propagation modelling. These features were obtained by acquisition in a georeferred basis of measured data in order to facilitate their comparison with ...
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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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