Phased-Array antenna beam squinting related to frequency dependency of delay circuits


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Garakoui, Seyed Kasra and Klumperink, Eric A.M. and Nauta, Bram and Vliet van, Frank E. (2011) Phased-Array antenna beam squinting related to frequency dependency of delay circuits. In: 41st European Microwave Conference, EuMA 2011, 10-13 October 2011, Manchester, UK.

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Abstract:Abstract-Practical time delay circuits do not have a perfectly linear phase-frequency characteristic. When these delay circuits are applied in a phased-array system, this frequency dependency shows up as a frequency dependent beam direction (“beam squinting”). This paper quantifies beam squinting for a linear one-dimensional phased array with equally spaced antenna elements. The analysis is based on a (frequency-dependent) linear approximation of the phase transfer function of the delay circuit. The resulting relation turns out to be invariant for cascaded cells. Also a method is presented to design time-delay circuits to meet a maximum phased-array beam squinting requirement.
Item Type:Conference or Workshop Item
Copyright:© 2011 IEEE
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/79644
Official URL:http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6101846
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