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A study of symmetric-pair antenna arrays for direction finding and communications

Titze, Wolfram Albert Ulrich; (1993) A study of symmetric-pair antenna arrays for direction finding and communications. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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A novel type of phased array, called a symmetric-pair array, is described. Its antenna elements are arranged in pairs around a common phase centre, which yields easy-to-process biphase output signals from each pair. Symmetric-pair arrays are attractive for applications such as direction finding and beam forming and, due to the nature of the pair output signals, it is also possible to achieve gain with isotropic coverage on reception. The properties of symmetric-pair arrays are examined, both for ideal conditions and in the presence of phase and amplitude errors. Graphical representations of the pair output signals are introduced to aid in the understanding of the properties of this type of antenna array. The necessary algorithms and techniques to perform unambiguous direction finding with symmetric-pairs are developed. A detailed outline of a symmetric-pair direction finding system is given, and different options to process its baseband signals are discussed. The performance of the direction finder in low signal-to-noise environments is analysed using the mathematics of random processes, and the probability of detection as a function of false-alarm rate and angle of arrival is evaluated. Beam forming techniques for symmetric-pair arrays are explained, and it is shown that this type of array allows savings in the control hardware due to its inherent symmetry. The problem of gain with isotropic coverage for reception is discussed, and it is demonstrated how it can be achieved with symmetric-pair arrays. Computer simulations and experimental results are used throughout the thesis to confirm and support the presented theory.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: A study of symmetric-pair antenna arrays for direction finding and communications
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest.
Keywords: Applied sciences; Antenna arrays
URI: https://discovery.ucl.ac.uk/id/eprint/10099789
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