An analysis of conditional site diversity: a study at Ka-band


Hodges, D. D. and Watson, R. J., 2009. An analysis of conditional site diversity: a study at Ka-band. IEEE Transactions on Antennas and Propagation, 57 (3), pp. 721-727.

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    The use of ERF and SHF frequencies above 20 GHz is becoming increasingly important for high-capacity communication systems. Whether these systems are slant-path links, terrestrial fixed links, or deep-space links, the high bandwidths available and the relatively low spectral congestion are very attractive. One of the main disadvantages of these frequency bands is that the attenuation caused by meteorological effects can become significant, and the attenuation caused by clouds, rain, and atmospheric gases becomes very large. The largest attenuation events are caused by rain and clouds with a high liquid water content. In order to provide high-availability links, it is possible to use site diversity, by providing two spatially independent terminals. The spatial separation of the terminals reduces the probability of both terminals being faded. In this paper, we present an analysis of two spatially unique measurements of a satellite-based 20.7-GHz beacon. The results show that even at modest separations there is still the opportunity for significant availability improvements using site diversity. The probability density functions (pdfs) conditioned on the single-site attenuation level are presented. These demonstrate a characteristic shape and could form the basis of future modeling approaches.


    Item Type Articles
    CreatorsHodges, D. D.and Watson, R. J.
    Related URLs
    URLURL Type
    Uncontrolled Keywordsmicrowave communication,satellite communication,diversity methods
    DepartmentsFaculty of Engineering & Design > Electronic & Electrical Engineering
    Publisher Statementhodges-57-3-2009.pdf: Copyright © 2009 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bath’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
    ID Code14181


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