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Design of wideband microstrip monopole slot antenna

광대역 마이크로스트립 모노폴 슬롯안테나의 설계

  • Lee, Young-Soon (Department of Electronic Engineering, Kumoh National Institute of Technology) ;
  • Cho, Yun-Ki (Department of Advance test team, SL Corporation)
  • 이영순 (금오공과대학교 전자공학부) ;
  • 조윤기 (SL 주식회사 종합시험팀)
  • Received : 2012.08.21
  • Accepted : 2012.10.30
  • Published : 2012.10.30

Abstract

In the present study, wideband microstrip monopole slot antennas which can be applied to the RF4CE Zigbee remote controller are designed. First I-shaped monopole slot antenna which has ${\lambda}g/4$ length at 2.45GHz is designed. In particular, a conducting via is used to connect the microstrip feed line and the ground plane surrounded with the etched slot for the bandwidth improvement. In order to reduce the antenna size, it is changed into L-shaped and T-shaped monopole slot antennas for which improve results of antenna performance are observed. In case of T-shaped monopole slot antenna, impedance bandwidth(VSWR<2) is about 3.32GHz, and also its radiation efficiency and gain is more than 90% and 2.1dBi respectively at whole operating frequency range. In particular, all of proposed monopole slot antennas have the end-fire radiations which has a maximum radiation power toward direction of open ends of monopole slots.

본 논문에서는 RF4CE ZigBee 리모컨에 적용할 수 있는 광대역 모노폴 슬롯 안테나를 설계 하였다. 먼저 사용 주파수 대역인 2.45GHz에서 ${\lambda}/4$길이를 가지는 I형 노폴 슬롯안테나를 설계 하였고, 마이크로스트립 급전선과 슬롯을 둘러싸고 있는 접지면과의 비아를 통한 직접연결 방법을 사용하여 광대역의 특성을 얻을 수 있었다. 안테나 점유공간의 축소를 위해 슬롯의 형태를 L형과 T형으로 변경하였고, 그 결과 안테나 성능이 개선되어짐을 확인 할 수 있었다. 최종적인 안테나 구조인 T형 모노폴 슬롯안테나의 경우 VSWR<2 대역폭이 약 3.32GHz였으며, 전 대역에서 90%이상의 방사효율과 2.1dBi 이상의 이득을 얻을 수 있었다. 본 논문에서 설계되어진 3가지 구조의 방사패턴은 모두 슬롯이 개방된 방향으로 엔드파이어 방사특성을 가진다.

Keywords

References

  1. B. Z. W. Qing-Qiang He, Zhong-Liang Yin, "Research on broadband characteristics of double folded-slot antenna with back ground conductor," Microwave and Optical Technology Letters, vol. 49, no. 8, pp. 1829-1833, 2007. https://doi.org/10.1002/mop.22603
  2. W. R. Deal, V. Radisic, Q. Yongxi and T. Itoh, "A broadband microstrip-fed slot antenna," Technologies for Wireless Applications, Digest. 1999 IEEE MTT-S Symposium on, pp. 209-212, 1999.
  3. P. Y. L. Ching-Lieh Li, Chun-Kai Huang, "Impedance bandwidth improvement for microstrip-fed slot antennas using short-circuited termination," Microwave and Optical Technology Letters, vol. 45, no. 1, pp. 67-70, 2005. https://doi.org/10.1002/mop.20726
  4. H. S. Tsai, M. J. W. Rodwell and R. A. York, "Planar amplifier array with improved bandwidth using folded-slots. IEEE Microwave Guided Wave Letter, pp. 112-114, 1994.
  5. A. Axelrod, M. Kisliuk, and J. Maoz, "Broadband Microstrip-fed Slot Radiator," Microwave Journal, pp. 81-94, Jun. 1989
  6. S. K. Sharma, L. Shafai, N. Jacob, "Investigation of Wide-Band Microstrip Slot Antenna," IEEE TRANSACTIONS on ANTENNAS and PROPAGATION, vol. 52, no. 3, pp. 865-872, March 2004. https://doi.org/10.1109/TAP.2004.825191
  7. S. I. Latif, L. Shafai, and S. K. Sharma, "Bandwidth Enhancement and Size Reduction of Microstrip Slot Antennas." IEEE TRANSACTIONS on ANTENNAS and PROPAGATION, vol. 53, no. 3, pp. 994-1003, March 2005. https://doi.org/10.1109/TAP.2004.842674
  8. Trade mark of CST corp.

Cited by

  1. 소형 광대역 L-형 슬롯 안테나 vol.18, pp.4, 2012, https://doi.org/10.12673/jant.2014.18.4.376