DOI QR코드

DOI QR Code

A Printed, Wideband Folded Monopole Antenna Coupling with a Parasitic Inverted-L Element for Bluetooth, WiMAX and UWB Systems

Bluetooth, WiMAX, UWB 시스템용 역 L형 무급전 소자 결합 프린트형 광대역 폴디드 모노폴 안테나

  • Kim, Ki-Baek (Department of Radio Science & Engineering, Chungnam National University) ;
  • Ryu, Hong-Kyun (Department of Radio Science & Engineering, Chungnam National University) ;
  • Woo, Jong-Myung (Department of Radio Science & Engineering, Chungnam National University)
  • Accepted : 2011.10.05
  • Published : 2011.11.30

Abstract

This paper presents a printed, wideband folded monopole antenna for laptop and tablet computer applications. The proposed antenna is designed to cover bandwidth(2.3~10.6 GHz) of Bluetooth, WiMAX, and UWB system by using the printed folded monopole antenna having asymmetrical line width coupling with a parasitic inverted- L element. Also, wireless LAN band(5.15~5.85 GHz) which interferes with UWB system is rejected by inserting half-wavelength open stub in the folded monopole antenna. -10 dB bandwidth of the fabricated wideband antenna is 2.27~10.6 GHz (4.7:1) and -10 dB band-rejected bandwidth is measured as 700 MHz(5.15~5.85 GHz, 12.72 %). The gain and efficiency of the antenna except for the rejected band are higher than 3.93 dBi and 91.89 % and are measured as -2 dBi and 14.65 % at 5.5 GHz which is band-rejected frequency. The size of the antenna is suitable to install for small space of tablet and laptop computers as 12.75(1 ${\lambda}$/10)${\times}$12(1 ${\lambda}$/11) $mm^2$(${\lambda}$ is free space wavelength at 2.3 GHz). Therefore, we verified that the designed antenna is appropriate for wideband antenna of tablet and laptop PC applications.

본 논문에서는 테블릿 및 노트북 컴퓨터에 적용될 수 있는 프린트형 광대역 폴디드 모노폴 안테나를 제안하였다. 제안된 안테나는 두 선로의 폭이 비대칭인 프린트형 폴디드 모노폴 안테나와 역 L형 무급전 소자를 결합하여 Bluetooth, WiMAX, UWB 시스템의 대역폭(2.3~10.6 GHz)을 수용할 수 있도록 설계하였다. 또한, 폴디드모노폴 안테나 내부에 반파장 오픈 스터브를 삽입하여 UWB 대역과 간섭을 일으키는 무선 랜 대역(5.15~5.85 GHz)을 차단하였다. 제작된 무선 랜 대역 차단 광대역 안테나의 -10 dB 대역폭은 2.27~10.6 GHz(4.7:1)이며, -10 dB 대역 저지 대역폭은 700 MHz(5.15~5.85 GHz, 12.72 %)로 측정되었다. 안테나의 이득과 효율은 차단 대역을 제외하고 각각 3.93 dBi와 81 % 이상으로 나타났으며, 차단 대역에서 이득은 -2 dBi(5.5 GHz) 효율은 14.65 %로 측정되었다. 안테나의 크기는 12.75(1 ${\lambda}$/10)${\times}$12(1 ${\lambda}$/11) $mm^2$(${\lambda}$는 2.3 GHz의 공기중 파장)로 테블릿 및 노트북의 작은 공간에 탑재하기에 적합한 크기를 가진다. 따라서 설계된 안테나가 테블릿 및 노트북 컴퓨터용 광대역 안테나로 적합함을 확인하였다.

Keywords

References

  1. 이호선, 김종찬, 우종명, "프린트형 역 F 안테나", 마이크로파 및 전파학술대회 논문집, 22(2), pp. 253-256, 1999년 9월.
  2. L. Pazin, N. Telzhensky, and Y. Leviatan, "Multiband flat-plate inverted-F antenna for Wi-Fi/Wi- MAX operation", IEEE Antennas Wireless Propag. Lett., pp. 197-200, Jul. 2008.
  3. C. -T. Lee, K. -L. Wong, "Uniplanar printed coupled- fed PIFA with a band-notching slit for WLAN/ WiMAX operation in the laptop computer", IEEE trans. Antennas Propag., vol. 57, no. 4, pp. 1252- 1258, Apr. 2009. https://doi.org/10.1109/TAP.2009.2015843
  4. N. Choi, "Compact UWB antenna with I-shaped band- notch parasitic element for laptop applications", IEEE Antennas Wireless Prapag. Lett., pp. 580-582, Aug. 2009.
  5. Z. N. Chen, D. Liu, and B. Gaucher, "A plannar dualband antenna for 2.4 GHz and UWB laptop applications", IEEE Vehicular Technology Conference, pp. 2652-2655, May 2006.
  6. K. -H. Kim, Y. -J. Cho, and S. -H. Hwang, "A band rejected UWB planar monopole antenna with a ring-shaped parasitic patch", Asia-Pacific Conference Proceedings, vol. 4, pp. 3, Dec. 2005.
  7. Qing-Xin Chu, Tian-Gui Huang, "A compact UWB antenna with sharp band-norched characterisrics and controllable notched bandwidth", Microwave Conference Proceedings, pp. 630-633, Dec. 2010.
  8. Chen Jun Lei, Zou Wei Xia, and Zhou Zheng, "A compact band-rejected UWB antenna design with time domain analysis", IEEE International Symposium on Knowledge Acquisition and Modeling Workshop, pp. 243-247, Dec. 2008.
  9. K. -B. Kim, H. -K. Ryu, and J. -M. Woo, "Compact wideband folded monopole antenna coupled with parasitic inverted-L element for laptop computer applications", Electron. Lett., vol. 47, no. 5, pp. 301-303, Mar. 2011. https://doi.org/10.1049/el.2010.3258
  10. 이호, 류홍균, 우종명, "저자세를 위한 프린트형폴디드 역 F 안테나", 한국통신학회 하계종합학술발표회 논문집, 37, p. 748, 2008년 7월.
  11. Y. Mushiake, "An exact step-up impedance ratio chart of a folded antenna", IRE Trans. Antennas Propargation, vol. 3. no. 4, pp. 163, Oct. 1954.
  12. X. L. Bao, M. J Ammann, "Printed band rejection UWB antenna with H-shaped slot", IWAT07 International Workshop, pp. 319-322, Mar. 2007.
  13. B. J. Starkey, E. Fitch, "Mutual impedance and self- impedance of coupled parallel aerials", The Proceedings of the Institution of Electrical Engineers, vol. 97, no. 47, May 1950.

Cited by

  1. Wireless Webcam Implementation and Application Utilizing Wireless USB Technology vol.18, pp.3, 2014, https://doi.org/10.6109/jkiice.2014.18.3.569