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Miniaturized Design of Log-Periodic Dipole Array Antenna Using Half-Bowtie Dipole Elements
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 Title & Authors
Miniaturized Design of Log-Periodic Dipole Array Antenna Using Half-Bowtie Dipole Elements
Yeo, Junho; Lee, Jong-Ig;
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In this paper, a design method for a compact log-perio dic half-bow-tie dipole array antenna for an operation in a UWB band(3.1-10.6 GHz) is studied. The proposed antenna is miniaturized by using half-bow-tie shaped dipole elements instead of strip-type dipole elements, which are commonly used in a general log-periodic dipole array(LPDA) antenna, and by reducing the element spacing. The effects of the flare angle of the half-bow-tie elements and the spacing factor on input reflection coefficient and realized gain characteristics of the proposed log-periodic antenna are analyzed. The optimized antenna is fabricated on an FR4 substrate, and the experiment results show that the antenna has a frequency band of 2.95-11.31 GHz for a VSWR < 2, which assures the operation in the UWB band. In addition, the length and width of the proposed antenna are reduced to 32.1 % and 18.3 %, respectively, compared to the LPDA antenna.
log-periodic dipole array antenna;half-bowtie dipole element;ultra wideband(UWB);miniaturization;
 Cited by
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