无线电物理前沿进展.pptVIP

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2019-02-18 发布于安徽
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无线电物理前沿进展.ppt

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* G. Lerosey, J. de Rosny, A. Tourin, A. Derode, G. Montaldo, and M. Fink Laboratoire Ondes et Acoustique, ESPCI, Universite′ Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris France (Received 9 December 2003; published 14 May 2004) G. Lerosey, J. de Rosny, A. Tourin, A. Derode, G. Montaldo, and M. Fink Laboratoire Ondes et Acoustique, ESPCI, Universite′ Paris VII, UMR 7587, 10 rue Vauquelin, 75005 Paris France (Received 9 December 2003; published 14 May 2004) 光纤技术的创建主要归功于华人Charles K. Gao 美籍华裔光导通讯专家兼中文大学前校长高锟博士 Optical Fiber 美籍华裔光导通讯专家高锟博士 microwave fibre-optic The many advantages of microwave fibre-optic communication links over conventional coaxial or waveguide links are well known. They include reduced size, weight and cost, low and constant attenuation over the entire modulation frequency range, imperviousness to electromagnetic interference, extremely wide bandwidth, low dispersion, and high information transfer capacity. These advantages mean that they are currently viable contenders for a number of applications of commercial importance including: microwave fibre-optic2 Personal Communications Networks, where microcells in a wide area are connected by optical fibres and use radio extension links to the home allowing increased bandwidth (and the possibility of mobile broadband systems) and high spectrum reuse efficiency without the significant expense of installing fibre to the home; Millimetre-wave radio LANs, with the radio nodes (possibly picocells) are fed by optical fibre with similar advantages to the above; Antenna Remoting at satellite earth stations where optical fibre transmission allows the concentration of the remote equipment at a central location and the quick re-routing of traffic to different antennas via centralised switching; Broadband video distribution networks, using subcarrier multiplexing and exploiting the advantages of the broad bandwidth and low loss of optical fibre; Signal distribution for phased array antennas, where