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Miniaturized Design of Log-Periodic Dipole Array Antenna Using Half-Bowtie Dipole Elements

반-보우타이 모양 다이폴 소자를 이용한 대수-주기 다이폴 배열 안테나의 소형화 설계

  • Received : 2016.05.18
  • Accepted : 2016.06.08
  • Published : 2016.06.30

Abstract

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.

Keywords

log-periodic dipole array antenna;half-bowtie dipole element;ultra wideband(UWB);miniaturization

References

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