A Novel Unidirectional Radiator with Superb UWB Characteristics for X-band Phased Array Applications

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Tran, D. P.; Tanyer-Tigrek, F. M.; Lager, I. E; Ligthart, L. P. (International Research Centre for Telecommunications and Radar (IRCTR), Delft University of Technology, Mekelweg 4, 2628 CD, Delft, the Netherlands)

We propose a compact, CPWG-fed, single layer UWB-ring-slot antenna for X-band phased array applications. Superb EM-characteristics are obtained for the whole designed frequency band: 1) nearly perfect linear phase, 2) small phase delay, 3) negligible phase dispersion characteristics, nearly constant group delay, (deviation is of sub-nanosecond level), 4) UWB impedance bandwidth, 5) in-band flat, balanced and constant power delivery, 6) nearly constant and repeatable radiation patterns in array plane, 8) over 90% of efficiency, 9) simple and compact, 10) symmetrical fed-and-excited radiator with “uni-directional” radiation pattern, and11) with smallest-form-factor. Other excellent UWB antenna-related characteristics obtained with this design will also be reported.