Compact switched-beam array antenna for mobile satellite communications

N. C. Karmakar, M. E. Bialkowski

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8 Citations (Scopus)


This paper presents the design and development of a compact switched-beam array antenna for operation with the Australian mobile satellite communications system. Mobilesat. The antenna is formed by eight aperture-coupled microstrip patch elements that are positioned on the side of a truncated cone. Two elements, facing the satellite, are activated using an eight-way two-ports-on radial switch. The output ports of the radial switch incorporate 1-bit phase shifters. A total of 24 beams are produced using this beam-forming system. In order to reduce the manufacturing cost, inexpensive substrates and low-cost UHF p-i-n diodes are employed. Further reduction in cost is achieved by eliminating coaxial connectors between the beam-forming network and the antenna elements. Experimental results are presented for the individual antenna elements, the beam-forming network, and the entire switched-beam array.

Original languageEnglish
Pages (from-to)186-191
Number of pages6
JournalMicrowave and Optical Technology Letters
Issue number3
Publication statusPublished - 5 May 1999
Externally publishedYes

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