[天线]22 A NEW TWO-FLARE-SHAPED UWB ANTENNA ELEMENT

A NEW TWO-FLARE-SHAPED UWB ANTENNA ELEMENT 58Xzup_"  
Anatoliy O. Boryssenko1), Dmitriy L. Sostanovsky2) kYzKU2T\W  
1)Antennas & Propagation Laboratoty, University of Massachusetts, Amherst >Gml4vGK  
2)Ratio Research Company, Kiev, Ukraine B;>{0 s  
Abstract FzQTDu9  
A novel compact UWB antenna is based on using of two smoothly shaped flares of a 'k0[rDFc#3  
simple geometrical structure. The first flare, larger in size, serves as an antenna =@&cHY  
base, reflector and one of the radiator arms. The second flare, smaller in size, s$ENFp7P  
operates as the other arm of the radiator. An apparent idea is exploited in this /D&%v*~E  
design that an “ideal” UWB antenna would operate as a broadband well-matched {76c%<`WaP  
transformer for the current at its driving ports to the radiated fields that leave the \JEXX4%  
antenna aperture. Besides terminal matching, the antenna would provide a FY{e2~gi  
necessary spatial distribution of the radiated energy. In order to create such a @mP]*$00  
current-to-field transformer the flares of the proposed antenna are properly shaped RD7^&  
and driven through direct connection to coaxial cables without balun. The antenna CAq/K?:8  
is studied through numerical full-wave simulations and tests with several a8k;(/  
prototypes. The achieved performance in the band >5:1 involves <-10dB return loss, s#~GH6/  
>10dB fr .. nn/?fIZN4  
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