The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Characterization and Analysis of UWB Antennas in Time Domain

시간 영역에서의 초광대역 안테나 특성 해석

  • Song Jong-Hwa (Dept. of Electrical Equipment Information and Communications Eng., University of Science & Tech.) ;
  • Park Young-Jin (Power Telecommunication Network Group, Korea Electrotechnology Research Institute(KERI))
  • 송종화 (과학기술연합대학원대학교 전력정보통신공학과) ;
  • 박영진 (한국전기연구원 전기정보망그룹)
  • Published : 2006.03.01
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Abstract

In the paper, characterization and analysis of UWB(Ultra Wide Band) antennas in time domain are described. The impulse propagation channel including UWB antennas is proposed for the analysis in time domain. Using the proposed propagation channel, the technique of obtaining impulse response of UWB antenna is proposed. Also, ringing, peak value of the impulse response, and the width of the impulse response are introduced as parameters for characterizing a UWB antenna in time domain. A modified UWB conical monopole antenna, a UWB TEM horn antenna, and a UWB stepped fat monopole antenna were fabricated. From the measurement of reflection coefficients, three antennas had bandwidth more than 3 GHz. The impulse responses of the antennas were measured in an anechoic chamber. The results showed that the TEM horn with highest gain has the highest peak amplitude and the stepped fat monopole antenna with narrowest bandwidth for reflection coeffcient had the widest width of the impulse response. Also, ringing in the stepped fat monopole antennas and the UWB conical monopole antenna were observed.

본 논문은 시간 영역에서의 초광대역 안테나 특성 해석에 대하여 기술한다. 시간 영역 해석을 위해 임펄스 전파 채널에 대한 모델링을 제시하였고, 이를 근거로 초광대역 안테나에 대한 임펄스 응답의 유도 방법을 제시하였다. 또한, 시간 영역에서의 안테나의 특성을 나타내는 파라미터로서 떨림(ringing), 임펄스 응답의 첨두치, 그리고 응답 폭을 제시하였다. 임펄스 응답 측정을 위하여, 변형된 초광대역 코니컬 모노폴 안테나, 초광대역 TEM 혼 안테나, 초광대역 stepped fat 모노폴 안테나를 설계 및 제작하였다. 제작된 모든 안테나는 측정을 통하여 3 GHz 이상의 대역폭을 갖는 초광대역 특성을 보였다. 무반향 반사실에서 구한 각 안테나의 임펄스 응답 특성으로부터, 이득이 높은 TEM 혼이 가장 높은 첨두치를 가짐을 보였고, 대역폭이 가장 작은 stepped fat 모노폴 안테나가 가장 넓은 임펄스 응답 폭을 가짐을 확인했다. 또한, 떨림 현상은 TEM 혼안테나를 제외한 두 안테나에서 관찰되었다.

Keywords

References

  1. Federal Communications Commission(FCC), 'Revision of part 15 of the commission's rules regarding ultra wideband transmission system', First Report and Order, ET Docket 98-153, FCC02-48, Adopted Feb. 2002, Released Apr. 2002
  2. M. Z. Win, R. A. Scholtz, 'Impulse radio: How it works', IEEE Communications Letters, vol. 2, no. 1, Jan. 1998
  3. W. Soergel, F. Pivit, and W. Wiesbeck, 'Comparison of frequency domain and time domain measurement procedures for ultra wideband antennas', in Proc. Antenna and Measurement Tech. Assoc., 15th Ann Meeting and Symp., pp. 72-76, Oct. 2003
  4. E. G. Farr, C. E. Baum, 'Time domain characterization of antennas with TEM feeds', Sensor and Simulation Notes 426, pp. 7-11, Oct. 1998
  5. R. C. Robertson, M. A. Morgan, 'Ultra-wideband impulse receiving antenna design and evaluation', Ultra-Wideband Short-Pulse Electromagnetics, vol. 2, pp. 179-186, 1995
  6. Joon-Yong Lee, Sangsung Choi, 'Through-Material propagation characteristic and time resulution of UWB signal', Ultra Wideband Systems, 2004. Joint with Conference on Ultrawideband Systems and Technologies. Joint UWBST & IWUWBS. 2004 International Workshop, pp. 71-75, May 2004
  7. Zhi Ning Chen, Xuan Hui Wu, 'Consideration for source pulses and antennas in UWB radio systems', IEEE Trans. Antennas and Propagation, vol. 52, pp. 1739-1748, Jul. 2004 https://doi.org/10.1109/TAP.2004.831405
  8. S. L. Marple Jr., 'Computing the discrete-time 'analytic' signal via FFT', IEEE Trans. Signal Processing, vol. 47, pp. 2600-2603, Sep. 1999 https://doi.org/10.1109/78.782222
  9. 박영진, 송종화, 김관호, '임펄스 전파채널에서의 초광대역 안테나 영향 연구', 전자공학회 논문집, 42(12), TC, pp. 165-170, 2005년 12월
  10. W. Sogel, W. Wiesbeck, 'Influence of the antennas on the ultra-wideband transmission', EURASIP Journal on Applied Signal Processing, pp. 196-305, Mar. 2005
  11. B. Scheers, M. Acheroy, and V. Vorst, 'Time domain simulation and characterization of TEM horns using a normalised implse response', IEE Proc. Microw. Antennas Propag., vol. 147, pp. 463-468, Dec. 2000
  12. Y. -J. Park, J. -H. Song, and K. -H. Kim, 'A novel stepped fat monopole antenna for precision location system using impulse waveform', IEEE International Conference on Ultra-Wideband(ICU 2005), vol. 1, pp. 85-88, Sep. 2005