منابع مشابه
Energy Efficient Antenna Arrays for Indoor Three-dimensional Microwave Imaging
The effect of antenna array size, transmit power, component noise and other parameters on the performance of microwave imaging algorithms is characterized, with the focus on indoor applications where objects are in the array nearfield. A large antenna array testbed was built to capture threedimensional images of objects in the 17-20GHz band, and the quality of these images evaluated. The standa...
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This research involves the overlaps of antenna theory, fractal geometry, and numerical calculations. Its goal is to investigate how random or periodic antenna array geometry can be improved through the use of fractals. Using a program we developed in Matlab, we plotted the radiation of linear/planar antenna arrays. We were able to correctly analyze radiation of three two-dimensional arrays. Ano...
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The ubiquitous trend to “go wireless” is a symbol of our need for independence and flexibility. To allow for such an “all-wireless” world, large amounts of information with widely varying content have to be exchanged, utilising a limited wireless spectrum. Wireless capacity is thus the keyword and research concentrates on an efficient utilisation of the available frequency spectrum. Recently, i...
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PERFORMANCE IMPROVEMENTS IN WIRELESS CDMA COMMUNICATIONS UTILIZING ADAPTIVE ANTENNA ARRAYS by Weichen Ye This dissertation studies applications of adaptive antenna arrays and spacetime adaptive processing (STAP) in wireless code-division multiple-access (('D11 A) communications. The work addresses three aspects of the CDMA communications problems: (I) near-far resistance, (2) reverse link, (3) ...
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Antennas have become ubiquitous devices and occupy a salient position in wireless systems. Radio and TV as well as satellite and new generation mobile communications have experienced the largest growth among industry systems. The global wireless market continues to grow at breakneck speed and the strongest economic and social impact nowadays comes from cellular telephony, personal communication...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 1982
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.93053