대한전자공학회논문지TC (Journal of the Institute of Electronics Engineers of Korea TC)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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CATV/DBS용 신호분기기의 새로운 해석법 및 광대역 설계

A New Analysis Method and Broad-Band Design of Tap-Offs for CATV/DBS Systems

  • 발행 : 2000.12.01
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초록

CATV(Cable Television) 및 DBS(Direct Broadcasting Satellite)시스템용 신호분기기(Tap- 011)에 대한 4-Port 회로망의 해석법과 3-port회로망의 해석법을 제안하고, 이를 비교 및 검토한다. 해석법으로는 결합선로형 방향성결합기의 우·기 모오드 이론을 도입하여 변성기형 방향성결합기에 적용하였다. 제안한 해석방법의 타당성을 입증하기 위하여 등가회로를 제안하고, 분기특성을 시뮬레이션한 결과와 실험결과를 비교 검토하여 서로 잘 일치함을 보이고, 5 MHz∼2,500 MHz까지 광대역화하였다.

A new analysis method of Tap-011 for CATV and DBS systems was proposed and investigated by using 4-port and 3-port equivalent circuits. As an analysis method the even odd-mode theory for a symmetrical coupled-line directional coupler was introduced, and then it was applied to transformer type directional coupler. By comparing the results of simulation and measurement, the validity of the proposed analysis method was confirmed. Furthermore, the Tap-off has been broadened from 5 MHz to 2.500 MHz by adopting the proposed theory.

키워드

참고문헌

  1. David M. Pozar, Microwave Engineering, Addison-Wesley, 1990
  2. Dong Il Kim, Kyeong Sik Min, Se-Mo Chung, 'A study on the Fine Adjusting Method of Tap-off for CATV Trans-mitting Circuit Using Coupled Line Theory,' Journal of the Korean Institute of Telematics and Electronics, vol. 31-A, no. 6, Jun. 1994
  3. Dong Il Kim, Michiharu Takahashi, Kiyomichi Araki, Yoshiyuki Naito, 'Optimum Design of the Power Dividers with Ferrite Toroids for CATV and/or MATV Systems,' IEEE Trans. on Consumer Electronics, vol. CE-29, no. 1, pp. 27-38, Feb. 1983 https://doi.org/10.1109/TCE.1983.356256
  4. Y. Natio, 'Formulation of Frequency Dispersion of Permeability,' Trans. IECE, vol. 59-c, pp.297-304, May. 1976
  5. Guillermo Gonzalez, Microwave Transistor Amplifiers : Analysis and Design, Prentice Hall, 2nd ed. 1997