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A shaped reflector antenna for 60-GHz indoor wireless LAN access points

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3 Author(s)
P. F. M. Smulders ; Fac. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands ; S. Khusial ; M. H. A. J. Herben

This paper addresses the design of a 60-GHz shaped reflector antenna that has to illuminate a predefined circular area without substantial spatial variation. At the boundary of this coverage area, the field strength has to fall off rapidly. Such efficient and confined illumination may be required in wireless networks that have to cope with a stringent link budget and/or require low channel dispersion. Typical examples are the emerging broadband wireless networks for customer premises and residential applications that will operate in the millimeter-wave frequency region. The particular property of the considered reflector is its diverging surface instead of the commonly applied converging shape. It is shown that the spatial variation within the defined coverage area can be within 1 dB, provided that the antenna is perfectly constructed. It is also shown that practical imperfections such as axial and lateral feed displacement and mispointing of the feed on top of effects due to blocking by the feed can contribute to spatial field variations on the order of a few decibels

Published in:

IEEE Transactions on Vehicular Technology  (Volume:50 ,  Issue: 2 )