Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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An Unequal Divider with Enhanced Physical Isolation Between Output Ports

출력포트 사이의 물리적 격리도를 향상시킨 비대칭분배기

  • Kim, Young (Department of Electronic Engineering, Kumoh National Institute of Technology) ;
  • Yoon, Young-Chul (Department of Electronic Engineering, Kwandong University)
  • 김영 (금오공과대학교 전자공학과) ;
  • 윤영철 (관동대학교 전자정보통신공학부)
  • Received : 2014.07.10
  • Accepted : 2014.08.21
  • Published : 2014.08.30
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Abstract

This paper presents the design and performance of an unequal divider with physical separation and electrical isolation. This divider has a series $18{\Omega}$ resistor and 0.7 pF capacitor circuit between two quarter-wave transmission lines at half phase angle from input terminal. This design method was improved a physical isolation between output ports and easy connected other circuit because of unnecessary of extra transmission line. To show the validity of the unequal divider with complex isolation components, a 4:1 ratio unequal divider was designed and measured at center frequency of 2 GHz. The measured divider performances have the return loss of 17 dB, insertion loss of 1.5 dB and 7.7 dB, and isolation of 18 dB. Its performance is in good agreement with the simulated results.

본 논문은 출력 포트 사이의 물리적인 분리와 전기적 격리도를 개선시킨 비대칭 분배기기의 설계와 성능을 나타낸 것이다. 이 분배기는 입력 포트와 연결된 두 개의 ${\lambda}/4$ 전송선로의 중앙에 격리소자 저항 $18{\Omega}$과 캐패시터 0.7 pF를 직렬로 연결하여 출력 포트 사이에 격리도를 높였고, 출력 포트가 다른 회로에 연결이 쉽도록 하는 설계 방법을 제시하였다. 이러한 설계는 출력포트의 격리도를 물리적으로 향상시켜주며, 이 분배기와 다른 회로가 연결 될 때 별도의 전송선로가 필요 없이 연결할 수 있는 특징을 갖고 있다. 이러한 특성을 확인하기 위하여 중심 주파수 2 GHz에서 4:1 비대칭 분배기를 설계하였고 측정된 결과는 반사계수가 17 dB 이상, 삽입손실은 1.5 dB 와 7.7 dB, 그리고 격리도는 18 dB 이상 특성을 얻었다. 이러한 전기적 특성은 시뮬레이션 결과와 일치함을 확인하였다.

Keywords

References

  1. J. G. Kim, H. S. Lee, H. S. Lee, J. B. Yoon, and S. C. Hong, "60 GHz CPW-Fed Post-Supported Patch Antenna Using Micromachining Technology," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 10, pp. 635-637, Oct. 2005. https://doi.org/10.1109/LMWC.2005.856690
  2. J. H. Kim, J. H. Cha, I. D. Kim, and B. M. Kim, "Optimum Operation of Asymmetrical-Cells-Based Linear Doherty Power Amplifiers- Uneven Power Drive and Power Matching," IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 5, pp. 1802-1809, May 2005. https://doi.org/10.1109/TMTT.2005.847073
  3. E. Wilkinson, "An N-way Hybrid Power Divider," IRE Transactions on Microwave Theory and Techniques, Vol. 8, No. 1, pp. 116-118, Jan. 1960. https://doi.org/10.1109/TMTT.1960.1124668
  4. M. Hamadallah, "Microstrip Power Dividers at mm-wave Frequencies," Microwave Journal, Vol. 31, No. 7, pp. 115-127, July 1988.
  5. D. Antsos, R. Christ, and L. Sukamoto, "A Novel Wilkinson Power Divider with Predictable Performance at K and Ka-Band," 1994 IEEE MTT-S Symposium Digest, pp. 907-909, May 1994.
  6. S. Horst, R. Bairavasubramanian, M. Tentzeris, and J. Papapolymerou "Modified Wilkinson Power Dividers for Millimeter-wave Integrated Circuits," IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 11, pp. 2439-2446, Nov. 2007. https://doi.org/10.1109/TMTT.2007.908672
  7. S. Kim, S. Jeon, and J. Jeong, "Compact Two-Way and Four-Way Power Dividers Using Multi-Conductor Coupled Lines," IEEE Microwave and Wireless Components Letters, Vol. 21, No. 3, pp. 130-132, March 2011. https://doi.org/10.1109/LMWC.2010.2100078
  8. C.J. Trantanella, "A Novel Power Divider with Enhanced Physical and Electrical Port Isolation," 2010 IEEE MTT-S Symposium Digest, pp. 129-132, May 2010.
  9. D. M. Pozar, Microwave Engineering, New York, NY: Wiely, 2005.