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Compact Dual-band CPW-fed Slot Antenna Using Split-Ring Resonator

분할 링 공진기를 이용한 소형 이중 대역 CPW-급전 슬롯 안테나

  • Yeo, Junho (School of Computer and Communication Engineering, Daegu University) ;
  • Park, Jin-Taek (Department of Mobile Communication Engineering, Changshin University) ;
  • Lee, Jong-Ig (Department of Electronics Engineering, Dongseo University)
  • Received : 2015.10.02
  • Accepted : 2015.11.09
  • Published : 2015.11.30

Abstract

In this paper, a design method for a compact dual-band coplanar waveguide-fed slot antenna using SRR(split-ring resonator) conductor is studied. The SRR conductor is loaded inside a rectangular slot of the proposed antenna for dual-band operation. When the SRR conductor is inserted into the slot, the original rectangular slot is divided into a rectangular loop region and a rectangular slot region, and frequency bands are created by the loop and slot, separately. A prototype of the proposed dual-band slot antenna operating at 2.45 GHz WLAN band and 3.40-5.35 GHz band is fabricated on an FR4 substrate with a dimension of 30 mm by 30 mm. Experiment results show that the antenna has a desired impedance characteristic with a frequency band of 2.38-2.51 GHz and 3.32-5.38 GHz for a voltage standing wave < 2, and measured gain is 1.7 dBi at 2.45 GHz, and it ranges 2.4-3.2 dBi in the second band.

본 논문에서는 분할 링 공진기(SRR; split-ring resonator)를 이용한 소형 이중 대역 코플래너 도파관 급전 슬롯 안테나에 대한 설계 방법을 연구하였다. 제안된 슬롯 안테나의 이중 대역 동작을 위해 SRR 도체를 직사각형 슬롯 내에 장하하였다. 기존의 직사각형 슬롯에 SRR 도체가 삽입되면 직사각형 루프 영역과 직사각형 슬롯 영역으로 나누어지며, 루프와 슬롯에 의해 각각 주파수 대역이 발생한다. 2.45 GHz WLAN 대역과 3.40-5.35 GHz 대역에서 동작하는 이중 대역 슬롯 안테나를 FR4 기판 상에 $30mm{\times}30mm$ 크기로 제작하였다. 실험 결과, 전압 정재파비 < 2인 대역이 2.38-2.51 GHz, 3.32-5.38 GHz으로 원하는 이중대역에서 동작하는 것을 확인하였고, 이득은 2.45 GHZ에서 1.7 dBi이고 두 번째 대역에서는 2.4-3.2 dBi로 측정되었다.

Keywords

References

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