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

A NEW TWO-FLARE-SHAPED UWB ANTENNA ELEMENT -car>hQq  
Anatoliy O. Boryssenko1), Dmitriy L. Sostanovsky2) $i@I|y/  
1)Antennas & Propagation Laboratoty, University of Massachusetts, Amherst B *%ey?  
2)Ratio Research Company, Kiev, Ukraine s;cGf+  
Abstract q~`dxq`}  
A novel compact UWB antenna is based on using of two smoothly shaped flares of a otbr8&?-  
simple geometrical structure. The first flare, larger in size, serves as an antenna ]-;M
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base, reflector and one of the radiator arms. The second flare, smaller in size, OJiw
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operates as the other arm of the radiator. An apparent idea is exploited in this 89Ir}bCr  
design that an “ideal” UWB antenna would operate as a broadband well-matched V5'(op/  
transformer for the current at its driving ports to the radiated fields that leave the 1pAcaJzf  
antenna aperture. Besides terminal matching, the antenna would provide a dngG=  
necessary spatial distribution of the radiated energy. In order to create such a ksf6O$  
current-to-field transformer the flares of the proposed antenna are properly shaped yw1-4*$c  
and driven through direct connection to coaxial cables without balun. The antenna 9,[Af
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is studied through numerical full-wave simulations and tests with several Cy dV$!&mP  
prototypes. The achieved performance in the band >5:1 involves <-10dB return loss, h@PE:=  
>10dB fr .. IG&twJR  
3~1Gts  

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