Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Wideband 6-port Phase Correlator Using Caxial Cable Impedance Transformer and Wireline Coupler

동축선 임피던스 변환기와 Wireline Coupler를 이용한 광대역 6-단자 위상 상관기

  • Park, Ung-hee (Department of Electronic Engineering, Kangwon University)
  • Received : 2022.07.07
  • Accepted : 2022.07.18
  • Published : 2022.08.31
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Abstract

The 6-port phase correlator consists of one in-phase power divider and three 3-dB 90-degree phase difference power dividers, and is mainly used in a demodulation circuit that determines the phase of an input signal. This paper proposes the wideband 6-port phase correlator that consists of an in-phase power divider using a wideband 2:1 impedance transformer with three 37.5-Ω coaxial cables, and a 3-dB 90-degree phase difference power divide using Wireline. The proposed wideband phase correlator fabricated at a center frequency of 1000MHz has the value of the input reflection coefficient(S11 and S22) -14dB or less in the frequency range of 640~1270MHz. Also, the signal transmission characteristic(Si1), from the in-phase power divider input port to four output ports, has the amplitude of -6.5±0.6dB and the phase error of within ±3.4°, and the signal transmission characteristic(Si2), from the 90 degree phase difference power divider input port to four output ports, has the amplitude of -6.1±0.6dB and the phase error of within ±6.2°.

6-단자 위상 상관기는 동위상 전력 분배기 한 개와 3-dB 90도 위상차 전력 분배기 세 개로 구성된 회로로 입력 신호의 위상을 판별하는 복조 회로에 주로 사용된다. 본 논문에서는 37.5-Ω 동축선 3개를 이용한 광대역 2:1 임피던스 변환 회로 구조의 동위상 전력 분배기와 Wireline 이용한 3-dB 90도 위상차 전력 분배기를 사용하여 광대역에서 동작하는 6-단자 위상 상관기를 제안하였다. 중심 주파수 1000MHz에서 제작된 제안된 광대역 6-단자 위상 상관기는 640~1270MHz 주파수 범위에서 동위상 전력 분배기 입력 신호에 대한 4개의 출력 단자로의 신호 전달 특성(Si1)은 세기 -6.5±0.6dB와 위상 오차 ±3.4° 이내, 90도 위상차 전력 분배기 입력 신호에 대한 신호 전달 특성(Si2)은 세기 -6.1±0.6dB와 위상 오차 ±6.2° 이내, 입력 반사계수(S11 and S22) -14dB 이하의 안정적인 값을 가졌다.

Keywords

References

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