Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Design and Fabrication of Wideband DFD Phase Correlator for 6.0~18.0 GHz Frequency

6.0~18.0 GHz 주파수용 광대역 DFD 위상 상관기 설계 및 제작

  • Choi, Won (Department of Electronics Engineering, Incheon National University) ;
  • Koo, Kyung-Heon (Department of Electronics Engineering, Incheon National University)
  • 최원 (인천대학교 전자공학과) ;
  • 구경헌 (인천대학교 전자공학과)
  • Received : 2014.05.29
  • Accepted : 2014.06.10
  • Published : 2014.08.30
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Abstract

This paper has presented the design and fabrication of phase correlator for wideband digital frequency discriminator (DFD) operating over the 6.0 to 18.0 GHz frequency range. Fabricated DFD phase correlator has been measured I or Q output signal, and analyzed frequency discrimination error. The operation of the proposed mixer type correlator has been analyzed by deriving some analytic equations. To design the phase correlator, this paper has modeled and simulated IQ mixer and 8-way power divider by using RF simulation tool. Designed phase correlator has fabricated and measured. The phase error and frequency discrimination error have been presented using by measured I and Q output signal. Over the 6.0~18.0 GHz range, the root mean square(RMS) phase error is $4.81^{\circ}$, RMS and frequency discrimination error is 1.49 MHz, RMS.

본 논문은 6.0~18.0 GHz 대역에서 동작하는 광대역 디지털 주파수 변별기(DFD, digital frequency discriminator)의 위상 상관기(phase correlator)를 설계하고 제작하였으며, 제작된 DFD 위상 상관기의 I와 Q 신호를 측정하고, 주파수 변별 오차를 분석하였다. 믹서형 위상 상관기의 동작 특성에 대한 해석적 관계식을 유도하였으며, 위상 상관기에 포함되는 IQ 믹서(mixer)와 8-way 전력분배기(power divider)는 RF 시뮬레이션 툴(tool)을 이용하여 모델링하였다. 설계된 위상 상관기는 제작되어 측정하였다. 제작된 위상 상관기의 I와 Q 출력신호를 측정하여 제시하였으며, 측정된 I와 Q 출력신호를 이용하여 위상오차(phase error)와 주파수 변별오차(frequency discrimination error)를 나타내었다. 위상 상관기의 평균 위상오차(phase error)는 $4.81^{\circ}$, RMS(root mean square)이고, 주파수 변별 오차는 1.49 MHz, RMS 이다.

Keywords

References

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