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Multi-Band Antenna Using Folded Monopole Line and Log-Periodic Structure

폴디드 모노폴 선로가 부착된 대수주기 구조를 이용한 다중대역 안테나

  • Received : 2014.08.18
  • Accepted : 2014.09.12
  • Published : 2014.09.30

Abstract

In this paper, an antenna which has quad band in GSM/DCS/PCS/Bluetooth is proposed. This structure is designed with miniaturization for wide band characteristic based on monopole antenna and log-periodic toothed trapezoid patch antenna which has slots. To achieve multi-bandwidth is used the microstrip line on the substrate. An antenna size is $35mm{\times}20mm$ on FR-4(${\varepsilon}r=4.4$) ground substrate of $35mm{\times}75mm{\times}1mm$ size. And proposed antenna is satisfied with impedance bandwidth(VSWR ${\leq}$ 3). The simulated maximum radiation gain is 1.92 dBi, 3.26 dBi, 3.97 dBi at the center frequency of 0.92 GHz, 1.97 GHz, 2.45 GHz, respectively.

본 논문에서는 4중대역 GSM/DCS/PCS/Bluetooth에서 동작 가능한 안테나를 제안하였다. 제안된 안테나는 소형화하여 광대역의 특성을 얻기 위해 모노폴 안테나를 기반으로 대수주기 톱니 형 사다리꼴 패치 안테나 안에 슬릿을 부설하였고, 다중 대역을 만족시키기 위해 마이크로 스트립 라인으로 설계하였다. 비유전율 4.4, 두께가 1 mm(GND포함), $35mm{\times}75mm$의 크기를 갖는 기판에 $35mm{\times}20mm$ 크기의 안테나를 설계하였으며, 제안된 안테나는 전 대역에서 임피던스 대역폭(VSWR ${\leq}$ 3)을 만족하고, 공진주파수는 920 MHz, 1.97 GHz, 2.45 GHz이며, 최대이득은 각각 1.92 dBi, 3.26 dBi, 3.97 dBi의 값으로 측정 되었다.

Keywords

References

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