Journal of electromagnetic engineering and science

  • 제12권2호
  • /
  • Pages.166-170
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  • 2012
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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Tunable Composite Right/Left-Handed Delay Line with Large Group Delay for an FMCW Radar Transmitter

  • Park, Yong-Min (Dept. of Radio Science and Engineering, Chungnam National University) ;
  • Ki, Dong-Wook (Dept. of Radio Science and Engineering, Chungnam National University)
  • 투고 : 2012.03.07
  • 심사 : 2012.05.04
  • 발행 : 2012.06.30
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초록

This paper presents a tunable composite right/left-handed (CRLH) delay line for a delay line discriminator that linearizes modulated frequency sweep in a frequency modulated continuous wave (FMCW) radar transmitter. The tunable delay line consists of 8 cascaded unit cells with series varactor diodes and shunt inductors. The reverse bias voltage of the varactor diode controlled the group delay through its junction capacitance. The measured results demonstrate a group delay of 8.12 ns and an insertion loss of 4.5 dB at 250 MHz, while a control voltage can be used to adjust the group delay by approximately 15 ns. A group delay per unit cell of approximately 1 ns was obtained, which is very large when compared with previously published results. This group delay can be used effectively in FMCW radar transmitters.

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참고문헌

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