Abdul Rahim, Sharul Kamal and Gardner, Peter (2007) Dual butler matrix active antenna system. Microwave And Optical Technology Letters, 49 (12). pp. 3004-3007. ISSN 0895-2477
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Official URL: http://dx.doi.org/10.1002/mop.22913
This article describes a smart antenna system that employs low noise amplifiers and two cascaded Butler Matrices. The output signals from the first Butler Matrix, which acts as a beamforming network, have high gain and narrowbeam width for long distance communication while the outputs from the second Butler Matrix, which acts as a mirror of the first Butler Matrix, reconstructing the antenna patterns of the individual radiating elements, have high linearity and broad beam width that can be used for short distance communication. Switching or selecting between the two sets of beams allows reception to be optimized for either vehicle to vehicle or vehicle to roadside beacon communications.
|Uncontrolled Keywords:||Butler matrix; cascaded butler matrices; low noise amplifier|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Deposited By:||INVALID USER|
|Deposited On:||06 May 2009 03:11|
|Last Modified:||06 May 2009 03:11|
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