UWB Monopole Antenna with a Top-hat Sleeve
نویسندگان
چکیده
This paper presents a top-hat sleeve monopole antenna for ultra-wideband (UWB) applications. The proposed antenna comprises a stem, a dielectric coat, and a top hat sleeve. A modal expansion technique used in cylindrical coordinate system is applied to study the impedance and radiation characteristics of the antenna. Influences of varying parameters of the antenna on impedance matching and radiation patterns are examined. The design demonstrates an extraordinarily broad bandwidth of up to 105% (2.65-7.95GHz), which covers the lower UWB band of 3.1-4.8 GHz very well and quite stable radiation performances across the bandwidth.
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